JP2022095374A - Moving image file creation device, creation method for the same, and program - Google Patents

Abstract

To improve editing process such as division on a moving image file of moving image data.SOLUTION: A moving image file creation device controls to acquire moving image data, create a moving image file including the acquired moving image data, and record the created moving image file in a recording medium. The moving image file creation device divides the acquired moving image data into a plurality of pieces of divided moving image data 1105, 1108, creates a moving image file including the plurality of pieces of divided moving image data 1105, 1108, a plurality of pieces of division management information 1103, 1106 corresponding respectively to the plurality of pieces of divided moving image data 1105, 1108, and entire management information on the entire moving image data, and generates the plurality of pieces of division management information 1103, 1106 so that the pieces of information are not referred to from pieces of entire management information moov atom 1101, 1301.SELECTED DRAWING: Figure 11

Description

The present invention relates to a moving image file generator, a method for generating the same, and a program.

Some information processing devices such as an image pickup device have a moving image file generation device for handling captured moving image data and the like. Such video data includes, for example, MP4 format video files standardized by ISO / IEC 14496-14: 2003. In the video file, all video data from the start to the end of the video is recorded. The moving image file generation device records a moving image file about moving image data by imaging or the like on an external recording medium such as an SD card.

By the way, in recent years, the capacity of external recording media has increased. In addition, opportunities for live video transmission are increasing. Due to these factors, the continuous time of a moving image file for one moving image data tends to be long. Information processing devices such as image pickup devices are required to be able to generate moving image data for, for example, several hours or more.

On the other hand, especially for video files of long-time video data, there are increasing opportunities to edit the video data of already generated video files. In the video data editing process, the video data before and after the unnecessary part may be cut and a part thereof may be cut out based on the MP4 format video file generated at the time of imaging. Then, in the editing process, when the amount of data of the editing source becomes large, it takes time to read or update the data. For example, if the size of an MP4 format video file recorded for a long time is large, a long waiting time may occur when copying the video file to a computer device, or it may take a long time to search for a desired scene in the video data. I need it. In particular, in the editing process for cutting out a part of the image data, it is necessary to reconstruct the moving image file so that the cut out image data can be played back each time the cutting process is performed. Further, even when the image file is transmitted to the external device, a long waiting time may occur until the content of the image file can be confirmed by the external device.

In Patent Document 1, the GOP boundary of an audio file in MPEG Audio format is aligned with the cluster boundary, which is a break for a cluster, which is the smallest unit of recording on a recording medium. As a result, the video data of the video file may be easily cut out for each cluster.

Japanese Unexamined Patent Publication No. 11-176083

However, even if the GOP boundary included in the moving image file is aligned with the cluster boundary which is the break for the cluster which is the minimum unit of recording on the recording medium as in Patent Document 1, the moving image data is divided for each cluster. , It cannot be said that the editing process becomes efficient. In order to be able to play the divided video data cut out for each cluster from the video file by the editing process, it is necessary to generate new management information about the divided video data for each cluster cut out from scratch. Even if the video data is divided into clusters in advance in this way, in order to be able to play the video data cut out from a part of it, the video file for the divided video data for each cluster cut out is reconstructed. There is a need to.

In order to solve the above-mentioned problems, it is an object of the present invention to provide a moving image file generation device and a generation method for generating a moving image file capable of simply editing a moving image file of moving image data.

The moving image file generation device according to the present invention generates an acquisition means for acquiring moving image data and a moving image file including the moving image data acquired by the acquisition means, and controls the generated moving image file to be recorded on a recording medium. The control means has a control means, and the control means divides the moving image data acquired by the acquisition means into a plurality of divided moving image data, and the plurality of divided moving image data and a plurality of corresponding divided moving image data, respectively. A moving image file including the divided management information of the above and the overall management information of the entire moving image data is generated, and the plurality of divided management information is generated so as not to be referred to by the overall management information.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to generate a moving image file in which editing processing such as division of moving image data into a moving image file can be simply executed.

It is a block diagram of the image pickup apparatus which has the moving image stream file generation apparatus which concerns on 1st Embodiment of this invention. It is explanatory drawing of an example of the file format of the moving image stream file which can be generated in the image pickup apparatus of FIG. It is explanatory drawing of the variation of the moving image stream file of MP4 format. FIG. 3 is a flowchart of a moving image stream file generation process at the time of imaging, which can be executed by the microcomputer of FIG. 1. It is a detailed flowchart of the moving image data file generation process of FIG. It is a detailed flowchart of the whole moov data generation process of FIG. It is a detailed flowchart of the moov file generation process of FIG. It is explanatory drawing of FAT processing for generating a moving image stream file. It is a flowchart of the moving image stream file generation processing at the time of image pickup in 1st Embodiment. 9 is a detailed flowchart of the divided moov file generation process of FIG. It is explanatory drawing of the moving image stream file generated in the external memory by the moving image stream file generation processing in 1st Embodiment. It is a flowchart of the moving image stream file generation processing at the time of image pickup in 2nd Embodiment. It is explanatory drawing of the moving image stream file generated in the external memory by the moving image stream file generation processing in the 2nd Embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the configurations described in the following embodiments are merely examples, and the scope of the present invention is not limited by the configurations described in the embodiments.

[First Embodiment]
FIG. 1 is a block diagram of an image pickup apparatus 1 having a moving image stream file generation apparatus according to the first embodiment of the present invention. The image pickup device 1 of FIG. 1 includes an image pickup lens 100, an image pickup element 101, an A / D converter 102, a microphone 103, and an A / D converter 104 together with a microcomputer 105 in order to capture a moving image as a moving image file generation device. Has. An A / D converter 102, an A / D converter 104, a volatile memory 106, a still image codec 107, a moving image codec 108, an audio codec 109, and a file generation unit 110 are connected to the microcomputer 105. A non-volatile memory 111, an external memory 112, a display member 113, and an operation member 114 are connected to the microcomputer 105.

The image pickup lens 100 is, for example, a single focus lens or a zoom lens composed of a plurality of lenses. The image sensor 101 is, for example, a CCD or a CMOS sensor. The image pickup device 101 converts the subject image imaged by the image pickup lens 100 into an analog video signal. The A / D converter 102 is connected to the image sensor 101 and converts an analog video signal into a digital video signal. The microphone 103 collects ambient sounds, for example, and converts them into analog sound signals. The A / D converter 104 is connected to the microphone 103 and converts an analog sound signal into a digital sound signal.

The volatile memory 106 is, for example, a semiconductor memory. The volatile memory 106 may record temporary data such as moving image data and still image data obtained by imaging. The volatile memory 106 may temporarily record still image data and audio data extracted from the moving image data by editing or the like. The still image codec 107 compresses and converts the still image data in the volatile memory 106 into a JPEG format. The video codec 108 converts the video data in the volatile memory 106 into H. Compressed and converted to 264 format, H. Data in 264 format is decompressed and converted. The audio codec 109 compresses and converts the audio data in the volatile memory 106 into the AAC format, and decompresses and converts the data in the AAC format. The file generation unit 110 generates a header file of JPEG compressed data converted by the still image codec 107, and generates a still image file in JPEG format. The file generation unit 110 is the H.A. generated by the video codec 108. A moving image data file is generated by multiplexing the data in 264 format and the data in AAC format generated by the audio codec 109. The file generation unit 110 generates a header file for the moving image data file generated by multiplexing. Some video data files can be used, for example, for video streaming playback in MP4 format. The file generation unit 110 may execute an editing process for the moving image data of the moving image stream file. The editing process includes, for example, a process of deleting parts before and after the video data of the editing source and cutting out a part. The editing process also includes, for example, a process of superimposing OSD data on moving image data. The file generation unit 110 may execute a process of reconstructing a video stream file for the edited video data.

The external memory 112 is, for example, a compact flash (registered trademark), an SD card, a smart media, or a hard disk drive. The external memory 112 may be provided so as to be removable from the image pickup apparatus 1. The display member 113 may be, for example, a liquid crystal monitor. The display member 113 may be the display unit of the image pickup apparatus 1. The operating member 114 includes, for example, a switch, a button, a touch panel, and the like. The operation member 114 may be an operation unit of the image pickup apparatus 1. The non-volatile memory 111 is, for example, a semiconductor memory. The non-volatile memory 111 may record the programs and data of the microcomputer 105. Such data may include setting data used for program execution and OSD data based on bitmap data that can be superimposed on moving image data.

The microcomputer 105 reads a program from the non-volatile memory 111 and executes it. As a result, the image pickup apparatus 1 is realized with a control unit that controls the operation of each unit. The microcomputer 105 captures a still image or a moving image based on the operation of the operation member 114, for example. When capturing a moving image, the microcomputer 105 temporarily stores the still image data included in the digital video signal and the sound data included in the digital sound signal in the volatile memory 106. The microcomputer 105 causes the still image codec 107, the moving image codec 108, and the file generation unit 110 to process the still image data and the sound data stored in the volatile memory 106. As a result, the moving image data file is temporarily recorded in the volatile memory 106. The microcomputer 105 records the processed moving image data file recorded in the volatile memory 106 in the external memory 112. In the external memory 112, the microcomputer 105 may record in the external memory 112 a moving image stream file for streaming and reproducing the moving image data generated by the image pickup device 1.

In addition to this, for example, when editing a moving image, the microcomputer 105 reads the data of the moving image stream file to be edited from the external memory 112 and records it in the volatile memory 106. The microcomputer 105 cuts out a part of the moving image data of the moving image stream file read out into the volatile memory 106, and causes the still image codec 107, the moving image codec 108, and the file generation unit 110 to process as necessary. As a result, a new moving image data file for streaming and playing back the cut out moving image data is temporarily recorded in the volatile memory 106. The microcomputer 105 records the processed moving image data file recorded in the volatile memory 106 in the external memory 112. The microcomputer 105 may record in the external memory 112 a moving image stream file for streaming and reproducing the moving image data generated by the editing process in the external memory 112.

In addition to this, for example, when playing a moving image, the microcomputer 105 reads the moving image stream file to be played back from the external memory 112, reproduces the moving image data, and displays it on the display member 113. In this way, the microcomputer 105 of the image pickup apparatus 1 can generate or acquire moving image data by imaging to generate a moving image stream file that can be streamed and reproduced.

FIG. 2 is an explanatory diagram of an example of a file format of the moving image stream file 20 that can be generated by the image pickup apparatus 1 of FIG. The moving image stream file 20 in FIG. 2 is in the MP4 format standardized by ISO / IEC14496-14: 2003. The video stream file 20 is an example of a video file. The moving image stream file 20 of FIG. 2 has an mdat atom 22 including encoded moving image data and a moov atom 21 containing management information of the moving image data.

The mdat atom 22 records all the moving image data from the start to the end of the imaging recorded in the moving image stream file 20. The mdat atom 22 has a plurality of chunk cNs 28. Each chunk 28 has a plurality of samples 29. Each sample 29 corresponds to the coded frame data 30. The frame data 30 basically corresponds to, for example, captured still image data. The moving image data is composed of a plurality of consecutive frame data. For example, the sample (sample s1) 29 corresponds to the coded frame data 30 of I0. The coded frame data 30 of B-2 corresponds to the sample (sample s2) 29. The coded frame data 30 of B-1 corresponds to the sample (sample s3) 29. The sample (sample s4) 29 corresponds to the coded frame data 30 of P3. Here, I0, I1, I2, ..., In are frame data 30 that have been intra-coded (in-frame coding). B0, B1, B2, ..., Bn are frame data 30 that are encoded (inter-frame coding) by reference from both directions. P0, P1, P2, ..., Pn are frame data 30 that are encoded (inter-frame coding) by reference from one direction (forward direction). In either coding, the frame data 30 is encoded with a variable length.

Various management information used when playing back the moving image data recorded in the mdat atom 22 is recorded in the moov atom 21. The moov atom 21 in FIG. 2 is general management information for the entire moving image data stored in the moving image stream file 20. The moov atom 21 has an mvhd atom 23 including header information in which the generation date and time and the like are recorded, and a trak atom 24 containing information regarding the moving image data stored in the mdat atom 22. The trak atom 24 includes a stco atom 25, a stsc atom 26, a stsz atom 27, and the like. The stco atom 25 stores information on the offset value of the mdat atom 22 to each chunk 28. The stsc atom 26 stores information on the number of samples 29 of each chunk 28. The stsz atom 27 stores information on the size of each sample 28. The amount of data of stco atom 25, the amount of data of stsc atom 26, and the amount of data of stsz atom 27 increase or decrease according to the amount of video data recorded in the video stream file 20, that is, the length of the recording time of the video data. .. For example, in the MP4 format moving image stream file 20 that stores 15 frames of 30 frames of image data per second in one chunk 28, the amount of data is about 1 MByte by recording for 2 hours. In this case, the moov atom 21 needs a capacity of about 1 MByte. Further, if the video data recorded in the MP4 format video stream file 20 increases with the passage of recording time, it may be necessary to write the already recorded large video data to the external memory 112 even during the recording. There is sex. However, as described above, the size of the moov atom 21 also increases or decreases depending on the recording time. Therefore, the size of moov atom 21 is unknown until the recording is completed. It is difficult to properly determine the offset position for exporting the already recorded large-sized video data as a video file.

FIG. 3 is an explanatory diagram of variations of an MP4 format video stream file. Similar to FIG. 2, the moving image stream file 31 of FIG. 3A includes the moov atom 21 at the beginning of the file, and the mdat atom 22 after the moov atom 21. In this case, the moov atom 21 is included at the beginning of the moving image stream file 31. By reading the data at the beginning of the video stream file 31, it is possible to read the management information for streaming and playing the video data. After that, when the moving image data included in the mdat atom 22 is read, the information for streaming the moving image data has already been acquired, so that the streaming reproduction can be started without delay. The video stream file 31 of FIG. 3A is suitable for streaming playback of video data.

The moving image stream file 32 of FIG. 3B includes the mdat atom 22 at the beginning of the file and the moov atom 21 after the mdat atom 22. In this case, since the mdat atom 22 is included at the beginning of the moving image stream file 32, even when the final recording time or the like is unknown and the data amount of the trak atom is unknown, for example, the moving image data by imaging or the like is recorded. It is possible to start recording. Even during recording such as during imaging, the offset position and the like described above can be appropriately determined, and a part of the already recorded moving image data can be written to the external memory 112. Moreover, when the recording by imaging is completed and the recording time or the like is clarified and the data amount of the trak atom is determined, the moov atom 21 for the entire moving image data can be recorded after the mdat atom 22.

As described above, in the MP4 format video stream file, one can be selected from a plurality of formats. Since the image pickup apparatus 1 can record in a state where the final image pickup time is unknown, recording in the format of FIG. 3B is preferred. However, when the moving image data of the moving image stream file 32 in the format of FIG. 3B is to be streamed, the reading of the data is started from the beginning of the moving image stream file 32. Then, unless the end of the video stream file 32 is read once, the moov atom 21 used for streaming the video data cannot be read. The video stream file 32 in the format of FIG. 3B is not suitable for streaming playback of video data. For streaming playback of video data, a video stream file 31 in the format of FIG. 3A is desired. In the moving image stream file 31 in the format of FIG. 3A, the moving image data stored in the mdat atom 22 can be immediately accessed by reading the moov atom 21 at the head of the file. In the moving image stream file 31 in the format of FIG. 3A, streaming playback of the moving image data can be started without delay from the start of reading the file.

FIG. 4 is a flowchart of a moving image stream file generation process at the time of imaging, which can be executed by the microcomputer 105 of FIG. The microcomputer 105 of the image pickup device 1 of FIG. 1 can execute the generation process of FIG. 4 as a generation means when the image pickup device 1 captures moving image data in order to generate a moving image stream file. Further, the external memory 112 in which the moving image stream file is finally recorded uses the FAT (FAT Allocation Table) file system generally used in the embedded device. The video stream file finally generated by the process of FIG. 4 has the format shown in FIG. 3A, and includes a moov atom at the beginning of the file and an mdat atom after the moov atom.

In step S501, the microcomputer 105 determines whether or not the moving image imaging for generating the moving image stream file has been started in the imaging device 1. The microcomputer 105 may determine that the moving image imaging has started when, for example, the operation member 114 of the imaging device 1 operates the moving image imaging start button. If the moving image imaging has not started, the microcomputer 105 repeats this process. When the moving image imaging is started, the microcomputer 105 advances the process to step S502. In step S502, the microcomputer 105 acquires moving image data by imaging as an acquisition means and executes a process of generating a moving image data file. Details of the video data file generation process will be described later in FIG. Further, for example, when the size of the moving image data already generated in the moving image imaging is very large, the microcomputer 105 performs a process of saving a part or all of the moving image data from the volatile memory 106 to the external memory 112. You may do it. In step S503, the microcomputer 105 executes the process of generating the entire moov data. Details of the overall moov data generation process will be described later in FIG.

In step S504, the microcomputer 105 determines whether or not the moving image imaging for generating the moving image stream file has been stopped or ended in the image pickup apparatus 1. The microcomputer 105 may determine that the moving image imaging is completed when, for example, the operation member 114 of the imaging device 1 operates the moving image imaging end button. If the moving image acquisition is not completed, the microcomputer 105 returns the process to step S502. The microcomputer 105 repeats the processes of steps S502 to S504 until the moving image imaging is completed. Video recording continues. When the moving image imaging is completed, the microcomputer 105 advances the process to step S505. In step S505, the microcomputer 105 executes the whole moov file generation process using the whole moov data generated by repeating the process of step S503. The microcomputer 105 records the entire moov file including the entire moov data finally generated in step S503 in the external memory 112. Details of the generation process of the entire moov file will be described later in FIG. In step S506, the microcomputer 105 executes the file combination processing for the moving image data file and the moov file recorded in the external memory 112 by the above processing. The external memory 112 uses the FAT file system. Therefore, the microcomputer 105 combines the moving image data file and the moov file recorded in the external memory 112 by rewriting the FAT of the external memory 112. The details of the file combination process will be described later in FIG. As a result, an MP4 format moving image stream file capable of streaming and playing back the moving image data captured by the imaging device 1 is generated in the external memory 112. As described above, the microcomputer 105 of the image pickup apparatus 1 can acquire the moving image data obtained by the image pickup and record the moving image data in the external memory 112 as a recording medium. Further, the microcomputer 105 repeatedly acquires the moving image data by imaging, updates the overall moov data which is the overall management information of the moving image data every time the moving image data is acquired, and obtains the overall moov data as the final overall management information. Can be generated.

FIG. 5 is a detailed flowchart of the moving image data file generation process of FIG. The microcomputer 105 of the image pickup apparatus 1 of FIG. 1 executes the process of generating the moving image data file of FIG. 5 in step S502 of FIG.

In step S601, the microcomputer 105 executes a process of generating moving image data that can be used for streaming playback. When the microcomputer 105 acquires the moving image data by imaging, it records it in the volatile memory 106. The microcomputer 105 instructs the image processing unit 206 to generate moving image data that can be used for streaming playback. The image processing unit 206 reads the image data recorded in the volatile memory 106 by imaging and generates moving image data that can be used for streaming playback. The image processing unit 206 records the generated moving image data in the volatile memory 106. In step S602, the microcomputer 105 determines whether or not the moving image data file has been generated. The microcomputer 105 finally writes out the moving image data recorded in the volatile memory 106 in step S601, for example. It may be determined whether or not the DAT file has already been generated in the external memory 112. stream. The DAT file is a file for storing data that is an mdat atom of an MP4 file. At this point, stream. The DAT file is, for example, a file in the middle of being written to the external memory 112 during imaging when a large-sized moving image data is being imaged. If the moving image data has never been written to the external memory 112 in this imaging, the external memory 112 may have a stream. The DAT file is not recorded. The stream for this imaging. If the DAT file is not recorded in the external memory 112, the microcomputer 105 advances the process to step S603. The stream for this imaging. If the DAT file has already been recorded in the external memory 112, the microcomputer 105 advances the process to step S604.

In step S603, the microcomputer 105 determines the stream for this imaging. A DAT file is newly generated in the external memory 112. After that, the microcomputer 105 advances the process to step S604. In step S604, the microcomputer 105 generates moving image data recorded in the volatile memory 106 that can be used for streaming playback in the external memory 112. Record in a DAT file. The stream of the external memory 112. If the moving image data is already recorded in the DAT file, the microcomputer 105 records it so as to add the moving image data recorded in the volatile memory 106 thereafter. As a result, stream. The DAT file is updated. By repeatedly executing step S502 of FIG. 4, the microcomputer 105 repeats the process of FIG. As a result, at the end of the moving image imaging, the moving image data from the beginning to the end of the imaging is recorded in the external memory 112 in a format that can be used for streaming reproduction. The external memory 112 contains the captured moving image data so that it can be streamed and played back. A DAT file is generated.

FIG. 6 is a detailed flowchart of the entire moov data generation process of FIG. The microcomputer 105 of the image pickup apparatus 1 of FIG. 1 executes the entire moov data generation process of FIG. 6 in step S503 of FIG. In step S701, the microcomputer 105 determines whether or not the entire moov data has been generated in the volatile memory 106. The overall moov data for this imaging was not generated immediately after the process of FIG. 4 was started. If the entire moov data for this imaging has not been generated, the microcomputer 105 advances the process to step S702. If the entire moov data for this imaging has already been generated, the microcomputer 105 advances the process to step S703. In step S702, the microcomputer 105 newly generates the entire moov data in the volatile memory 106. The whole moov data is data that becomes a moov atom of the MP4 file. The whole moov data has stco atom data, stsc atom data, stsz atom data, and other necessary data so as to correspond to the moving image data. After that, the microcomputer 105 advances the process to step S703. In step S703, the microcomputer 105 updates the entire moov data generated in the volatile memory 106. The microcomputer 105 updates the stco atom data, the stsc atom data, the stsz atom data, and other necessary data contained in the entire moov data so as to correspond to the image data up to the processing time point. By repeatedly executing step S503 of FIG. 4, the microcomputer 105 repeats the process of FIG. As a result, the entire moov data generated in the volatile memory 106 is updated. At the end of moving image imaging, the volatile memory 106 generates overall moov data for the entire captured moving image data from the beginning to the end.

FIG. 7 is a detailed flowchart of the entire moov file generation process of FIG. The microcomputer 105 of the image pickup apparatus 1 of FIG. 1 executes the generation process of the entire moov file of FIG. 7 in step S505 of FIG.

In step S801, the microcomputer 105 determines whether or not the final size of the total moov data generated in the volatile memory 106 is the cluster size alignment of the external memory 112 managed by the FAT. .. The cluster size in FAT is the data unit size that is used by recording data. If the cluster size is 32KByte, even if the data of 1Byte is recorded, the area of 32KByte will be used. The microcomputer 105 may determine whether the final size of the total moov data is a multiple of the cluster size. If the final size of the total moov data is not a multiple of the cluster size, the microcomputer 105 proceeds to step S802. For example, if the total moov data is 50 KByte and the cluster size of the external memory 112 is 32 KByte, the final size of the total moov data is not a multiple of the cluster size. The microcomputer 105 advances the process to step S802. If the final size of the total moov data is a multiple of the cluster size, the microcomputer 105 advances the process to step S803. For example, if the total moov data is 64KByte and the cluster size of the external memory 112 is 32KByte, the final size of the total moov data will be a multiple of the cluster size. The microcomputer 105 advances the process to step S803.

In step S802, the microcomputer 105 executes additional processing of the free atom. The microcomputer 105 adds a free atom to the total moov data that is not the cluster alignment size, and sets the total moov data as the cluster size alignment. The free atom may be added after the original whole moov data. As a result, the total moov data becomes a multiple of the cluster size of the external memory 112. Here, the free atom is data that can be literally freely defined, and generally, data indicating a blank is used. For example, if the original total moov data is 50 Kbytes and the cluster size of the external memory 112 is 32 KBbytes, a free atom is added after the original total moov data. In this case, the total moov data after addition may be, for example, 64KByte. After that, the microcomputer 105 advances the process to step S803. In step S803, the microcomputer 105 executes the recording process of the entire moov file. The microcomputer 105 records the entire moov data recorded in the volatile memory 106 as a moov file in the external memory 112. The file name of the entire moov file recorded in the external memory 112 may be the file name of the video stream file. The file name is, for example, MVI_0001. MP4 is fine. By executing step S505 of FIG. 4, the microcomputer 105 executes the process of FIG. 7. As a result, after the end of the moving image imaging, the entire moov file for the entire captured moving image data from the beginning to the end is recorded in the external memory 112.

FIG. 8 is an explanatory diagram of FAT processing for generating a moving image stream file. By the processing from step S501 to step S505 of FIG. 4, the external memory 112 contains a video data file containing the captured video data in a streamable format, and an entire moov file for the entire video data. Recorded. In step S506, the microcomputer 105 rewrites the FAT of the external memory 112, combines a plurality of files recorded in the external memory 112, and generates and records a moving image stream file in the external memory 112.

FIG. 8A is an explanatory diagram of the external memory 112 in which the moving image data file including the moving image data is written. As shown in FIG. 8A as a shaded area, the moving image data file is recorded across the first cluster and the second cluster of the external memory 112. In this case, 0x02 is recorded in the FAT of the external memory 112 in the cell corresponding to the first cluster, which is the start position of the moving image data file. 0x02 indicates that the data of the first cluster is a series of data connected to the data of the second cluster. 0xFF is recorded in the cell corresponding to the second cluster of FAT. 0xFF means that the data in the file ends in the cluster corresponding to the cell. As a result, it is recorded that one moving image data file (stream.DAT file) is recorded in the FAT of the external memory 112 from the first cluster to the second cluster of the external memory 112. When reading the moving image data file, the FAT of the external memory 112 records that a plurality of clusters are read in the order indicated by the arrows in the figure.

FIG. 8B is an explanatory diagram of the external memory 112 in which the entire moov file for the moving image stream file is written in addition to the moving image data file. As shown as a point region in FIG. 8 (b), the entire moov file is recorded in a third cluster of external memory 112. The first half of the whole moov file contains the data of the moov atom, and the second half contains the data of the free atom added for cluster size alignment. By adding the data of the free atom, the size of the whole moov file becomes a multiple of the data amount of the cluster and fits in the cluster. In this case, 0xFF is recorded in the FAT of the external memory 112 in the cell corresponding to the third cluster in which the entire moov file is recorded. As a result, it is recorded in the FAT of the external memory 112 that one whole moov file (MVI_0001.MP4 file) is recorded in the third cluster of the external memory 112.

FIG. 8C is an explanatory diagram of the external memory 112 after the FAT rewriting process in step S506. In order to stream the video stream file, the format shown in FIG. 3A is suitable. On the other hand, in order to generate a moving image stream file, the format of FIG. 3B is suitable. In the external memory 112 of FIG. 8B before the FAT rewriting process, the cluster of the entire moov file is located after the cluster of the video stream files. When these data are read out in order from the beginning of the external memory 112, the streaming playback data resulting from the reading is in the format shown in FIG. 3 (b).

Therefore, in step S506, the microcomputer 105 rewrites the FAT and combines the moving image data file recorded in the external memory 112 with the entire moov file. After the combination, the microcomputer 105 executes the combination process so that the entire moov data is located at the beginning of the moving image stream file. Specifically, the microcomputer 105 rewrites the cell corresponding to the third cluster in which the entire moov file is recorded in the FAT to a value indicating the cluster in which the head of the moving image data file is recorded. In the external memory 112 of FIG. 8B, the head of the moving image data file is the first cluster. The microcomputer 105 rewrites the cell corresponding to the third cluster to 0x01. As a result, an MP4 format moving image stream file capable of streaming and playing back the moving image data captured by the imaging device 1 is generated in the external memory 112. When reading the moving image stream file, the FAT of the external memory 112 records that a plurality of clusters are read in the order indicated by the arrows in the figure. In this moving image stream file, as shown in FIG. 3A, the entire moov data is included at the beginning of the file. Video data is included after the entire moov data. In the generated video stream file, the mdat atom is included at the beginning of the file, and the moov atom is included after the moov atom. The microcomputer 105 is a video data file, stream. A video stream file that can be streamed can be generated without performing a process of reading the DAT to the volatile memory 106 and writing it to the external memory 112 again. In the rewrite, the microcomputer 105 reads the stream to the volatile memory 106. DAT is a whole moov file, MVI_0001. It will be written to continue after MP4.

By the way, the moving image stream file thus generated so as to be streamably reproducible in the external memory 112 may be edited by the image pickup apparatus 1 or another apparatus. In the editing process of a video stream file, the video data before and after the unnecessary part may be cut and a part thereof may be cut out. When the amount of data in the video stream file of the editing source becomes large, it takes time to read or update the data during the editing process. Moreover, when a part of the video data is cut out and edited, it is necessary to reconstruct the video stream file from scratch so that the cut out video data can be played back. Next, the video stream file generation process in the present embodiment, which can be expected to improve the efficiency of such editing process, will be described.

FIG. 9 is a flowchart of the moving image stream file generation process at the time of imaging in the first embodiment. When the image pickup device 1 captures moving image data in order to generate a moving image stream file, the microcomputer 105 of the image pickup device 1 of FIG. 1 executes the generation process of FIG. 9 instead of FIG. 4 as a generation means. .. Further, the external memory 112 in which the moving image stream file is finally recorded uses the FAT (FAT Allocation Table) file system generally used in the embedded device. The video stream file finally generated by the process of FIG. 9 has the format shown in FIG. 3A, and includes a moov atom at the beginning of the file and an mdat atom after the moov atom.

In step S1001, the microcomputer 105 determines whether or not the moving image imaging for generating the moving image stream file has been started in the imaging device 1. The microcomputer 105 may determine that the moving image imaging has started when, for example, the operation member 114 of the imaging device 1 operates the moving image imaging start button. If the moving image imaging has not started, the microcomputer 105 repeats this process. When the moving image imaging is started, the microcomputer 105 advances the process to step S1002. In step S1002, as an acquisition means, the microcomputer 105 acquires moving image data by imaging and executes a process of generating divided moov data for the divided image data obtained by dividing the entire image data into a plurality of parts. Details of the generation process of the divided moov data will be described later in FIG. The microcomputer 105 may generate and record the divided moov data as a divided moov file in the external memory 112, but generate the divided moov data in the volatile memory 106 as a part of the moving image data included in the moving image data file. In step S1003, the microcomputer 105 executes a process of generating a moving image data file. The process of generating the moving image data file may be the same as that in FIG. The microcomputer 105 generates a moving image data file in the external memory 112 for recording the moving image data of the volatile memory 106 including the divided moov data together with the moving image data obtained by imaging. The microcomputer 105 appropriately saves the moving image data in the volatile memory 106 into a moving image data file. In step S1004, the microcomputer 105 executes a process of generating whole moov data for the whole moving image data. The details of the generation process of the entire moov data may be the same as in FIG.

In step S1005, the microcomputer 105 determines whether or not the moving image imaging for generating the moving image stream file has been stopped or ended in the image pickup apparatus 1. The microcomputer 105 may determine that the moving image imaging is completed when, for example, the operation member 114 of the imaging device 1 operates the moving image imaging end button. If the moving image acquisition is not completed, the microcomputer 105 returns the process to step S1002. The microcomputer 105 repeats the processes of steps S1002 to S1005 until the moving image imaging is completed. Video recording continues. When the moving image imaging is completed, the microcomputer 105 advances the process to step S1106. In step S1106, the microcomputer 105 executes the whole moov file generation process by using the whole moov data generated by repeating the process of step S1104 every time the divided moving image data is generated. The microcomputer 105 records the entire moov file including the entire moov data finally generated in step S1104 in the external memory 112. The details of the generation process of the entire moov file may be the same as in FIG. 7. In step S1007, the microcomputer 105 executes a combination process of a plurality of files such as a moving image data file and an entire moov file recorded in the external memory 112 by the above process. The external memory 112 uses the FAT file system. Therefore, the microcomputer 105 combines a plurality of files recorded in the external memory 112 by rewriting the FAT of the external memory 112. The method of file combination processing may be the same as that shown in FIG. As a result, the moving image stream file is generated and recorded in the external memory 112.

FIG. 10 is a detailed flowchart of the divided moov data generation process of FIG. The microcomputer 105 of the image pickup apparatus 1 of FIG. 1 executes the process of generating the divided moov data of FIG. 10 in the process of step S1002 of FIG. In FIG. 10, the microcomputer 105 generates the divided moov data in the volatile memory 106 as a part of the moving image data included in the moving image data file.

In step S1101, the microcomputer 105 determines whether or not the moving image data has a data amount in division units. The unit data amount for dividing the moving image data may be basically arbitrary. The unit data amount may be a fixed amount, but may be a variable amount according to the boundary of the moving image data. The unit data amount may be, for example, a frame at the GOP boundary every 30 minutes of moving image data. The unit data amount may be a frame at the GOP boundary of the moving image data. If the moving image data is not the amount of data in the division unit, the microcomputer 105 is processing one divided moving image data, so the process proceeds to step S1105. When the moving image data has a data amount in a division unit, the microcomputer 105 advances the processing to step S1102 in order to start the processing of the next divided moving image data. In step S1102, the microcomputer 105 updates the stream offset of the moving image data in order to reserve a data area for the divided moov data in the moving image data file. When the amount of data of the divided moving image data is known to some extent, the amount of data that should be secured as the divided moov data can be determined. The microcomputer 105 secures a data area in the moving image data with the amount of data to be used.

In step S1103, the microcomputer 105 determines whether or not it is a processing step of embedding the divided moov data in the moving image data. When the process stage of embedding the divided moov data in the moving image data, the microcomputer 105 advances the process to step S1104. If it is not the processing stage of embedding the divided moov data in the moving image data, the microcomputer 105 advances the processing to step S1105. In step S1104, the microcomputer 105 writes the divided moov data currently generated in the data area secured in step S1102. The uuid may be included in the divided moov data. By using the uuid, it is possible to store unique data in the divided moov data. In the divided moov data, metadata about the divided moving image data and representative still image data of the divided moving image data may be stored. Such divided moov data can be used as division management information when streaming and reproducing the divided moving image data. The divided moov data can be streamed and reproduced by being made into a divided moving image file together with the divided moving image data. Further, the uuid of the divided moov data may be recorded in the whole moov data or the like as the whole management information for managing the whole of the moving image data. Thereby, the division position can be easily specified. In step S1104, the microcomputer 105 updates the divided moov data. The microcomputer 105 updates the stco and stsz of the divided moov data with the current divided moving image data.

FIG. 11 is an explanatory diagram of a moving image stream file generated in the external memory 112 by the moving image stream file generation process in the first embodiment. When the microcomputer 105 executes the moving image stream file generation processing of FIGS. 9 and 10, the moving image stream file of FIG. 11 is generated and recorded in the external memory 112. The moving image stream file of FIG. 11 has an entire moov atom 1101 and an overall header area 1102 of the entire mdat that constitute overall management information for streaming and reproducing the moving image data. The whole moov atom 1101 includes a file type ftyp, a moving image metadata moov. In the whole header area 1102, the total data size of the moving image data is recorded.

Further, the moving image stream file of FIG. 11 has moving image data about the moving image stream file after the whole header area 1102. The moving image data of the moving image stream file is divided and stored in a plurality of mdat atoms 1105 and 1108. Each of the plurality of mdat atoms 1105 and 1108 includes divided moving image data obtained by dividing the entire moving image data into a plurality of parts. Further, the moving image data has a plurality of division management information corresponding to the plurality of mdat atoms 1105 and 1108. The split management information is management information for streaming and playing back each split video data. The division management information may basically have the same configuration as the overall management information. Here, the first division management information of the moving image stream file has a division moov atom 1103 and a corresponding division header area 1104. The split moov atom 1103 includes a file type ftyp, a metadata moov of the first split video data. The data size of the first divided moving image data is recorded in the divided header area 1104. The second division management information has a division moov atom 1106 and a corresponding division header area 1107. The split moov atom 1106 includes the file type ftyp, the metadata moov of the second split video data. The data size of the second divided moving image data is recorded in the divided header area 1107.

The divided moov atom 1103, the divided header area 1104, the divided moov atom 1106, and the divided header area 1107 are data areas that are not referenced by the entire moov atom 1101 that has jurisdiction over the whole. Not referenced means that the area does not correspond to the data storage area calculated from stco and stsz stored in the entire moov atom 1101. On the other hand, the plurality of mdat atoms 1105 and 1108 are referred to as continuous data areas from the whole moov atom 1101 which has jurisdiction over the whole. Further, in the divided moov atom 1103, stco and stsz for the divided image data stored in the mdat atom 1105 are constructed. In the divided moov atom 1107, stco and stsz for the divided image data stored in the mdat atom 1108 are constructed.

As described above, as a generation means, the microcomputer 105 generates the divided management information of the divided moving image data together with the overall management information for streaming and reproducing the entire moving image data when the moving image stream file of the moving image data is generated. Further, the microcomputer 105 generates the divided management information of the divided moving image data so as not to be referred to from the overall management information. Further, the divided management information of the divided moving image data is generated in the same format as the overall management information for streaming and playing the entire moving image data. The division management information may include image capture metadata and representative moving image data for the corresponding divided moving image data. Further, in the overall management information of the generated moving image data, the data size including the area of the management information of the divided moving image data is recorded.

In the moving image stream file of FIG. 11 having such a file format, a plurality of divided moving image data included in a plurality of mdat atoms 1105 and 1108 can be continuously streamed by using the whole moov atom 1101. Although the moving image stream file of FIG. 11 includes the divided moov atom 1103, the divided header area 1104, the divided moov atom 1106, and the divided header area 1107, the video stream file can be streamed without being affected by the divided moov atom 1103. In streaming playback, a plurality of divided video data are played back in order. The moving image stream file of FIG. 11 can be streamed and reproduced with a plurality of divided moving image data, similarly to the moving image stream file of FIG. 2 which does not include the divided management information.

Further, the moving image stream file of FIG. 11 divides and records the moving image data into a plurality of divided moving image data, and further includes a plurality of divided management information for each divided moving image data. Therefore, in the editing process for cutting out, for example, the mdat atom 1105 from the moving image stream file of FIG. 11, the split moov atom 1103 and the split header area 1104 including the split management information can be cut out together with the mdat atom 1105. The divided moving image stream file including these can be streamed and reproduced the divided moving image data of mdat atom 1105. In the editing process for cutting out the mdat atom 1108, the split moov atom 1106 and the split header area 1107 including the split management information can be cut out together with the mdat atom 1108. The divided moving image stream file including these can be streamed and reproduced the divided moving image data of mdat atom 1108. In the editing process for cutting out a part of the moving image data, it is not necessary to newly generate the management information for the cut out divided image data from scratch. There is no need to rebuild the split video stream file from scratch. The editing process for cutting out a part of the video data can be completed in a short time. Further, the moving image stream file of FIG. 11 can be easily divided into a plurality of divided moving image stream files and recorded. Therefore, when editing, copying, and transferring the moving image stream file of FIG. 11, a plurality of divided moving image stream files obtained by dividing the moving image stream file into a plurality of parts can be used instead. By using a plurality of divided video stream files, the editing process time can be shortened.

As described above, in the present embodiment, when the video stream file for the video data is generated, the video data is divided into a plurality of divided video data, and the overall management information for streaming the entire video data is generated. do. In the present embodiment, one moving image stream file including a plurality of divided moving image data obtained by dividing the moving image data and overall management information is generated. Further, in the present embodiment, when the moving image stream file is generated, the divided management information of the divided moving image data is generated so as not to be referred from the overall management information together with the overall management information. As a result, the video stream file uses the overall management information to stream the entire video data divided into a plurality of divided video data without being affected by the divided management information of the embedded divided video data. can do.

Moreover, in the present embodiment, in the moving image stream file of the moving image data, the divided management information of the divided moving image data is generated in association with each divided moving image data. Here, the divided management information of the divided moving image data has the same format as the overall management information for streaming and playing the moving image data. Therefore, each divided moving image data can be streamed and reproduced for each divided moving image data by cutting out the divided moving image data together with the divided management information into one divided moving image stream file in the editing process. In order to be able to play the divided video data cut out from the video data of the video stream file in the editing process, it is not necessary to newly generate the management information about the cut out divided video data from scratch. The editing process for cutting out and playing the divided moving image data can be improved.

As a result, in the present embodiment, when editing the moving image data of the already generated moving image stream file, it is not necessary to newly generate the management information about the cut out divided moving image data from scratch. The divided moving image data can be saved as an image file and used for editing processing by cutting out the management information together with the divided moving image data. In the editing process for cutting out a part of the video data, it is not necessary to reconstruct the video stream file from scratch so that the cut out video data can be played each time the cut out process is performed. A video stream file of the cut out video data can be easily generated in a short time.

Then, for example, even if the size of the MP4 format video stream file recorded for a long time is large, a necessary part of the video stream file can be cut out and copied to a computer device or the like in a short time. Since the image file is created for each divided video data, it is sufficient to search the scene for each divided video data, and it is not necessary to search from the beginning of the video data each time the search is performed, and the time required for the search can be shortened. .. Even when the image file is transmitted to an external device, it can be transmitted in a short time by transmitting the required divided moving image data of the divided image file.

[Second Embodiment]
Next, the image pickup apparatus 1 having the moving image stream file generation apparatus according to the second embodiment of the present invention will be described. In the following description, differences from the above-described embodiments will be mainly described.

FIG. 12 is a flowchart of the moving image stream file generation process at the time of imaging in the second embodiment. When the image pickup device 1 captures moving image data in order to generate a moving image stream file, the microcomputer 105 of the image pickup device 1 of FIG. 1 executes the generation process of FIG. 12 instead of FIG. 9 as a generation means. .. Further, the external memory 112 in which the moving image stream file is finally recorded uses the FAT (FAT Allocation Table) file system generally used in the embedded device. The moving image stream file finally generated by the process of FIG. 12 has the format shown in FIG. 3A, and includes a moov atom at the beginning of the file and an mdat atom after the moov atom.

In step S1201, the microcomputer 105 determines whether or not the moving image imaging for generating the moving image stream file has been started in the imaging device 1. The microcomputer 105 may determine that the moving image imaging has started when, for example, the operation member 114 of the imaging device 1 operates the moving image imaging start button. If the moving image imaging has not started, the microcomputer 105 repeats this process. When the moving image imaging is started, the microcomputer 105 advances the process to step S1202. In step S1202, the microcomputer 105 acquires moving image data by imaging as an acquisition means and executes a process of generating a moving image data file. The process of generating the moving image data file may be the same as that in FIG. The microcomputer 105 generates a moving image data file for recording moving image data by imaging in the external memory 112. The microcomputer 105 appropriately saves the moving image data in the volatile memory 106 into a moving image data file.

In step S1203, the microcomputer 105 executes a process of generating whole moov data for the whole moving image data. The details of the generation process of the entire moov data may be the same as in FIG. In step S1204, the microcomputer 105 executes a process of generating a divided moov file for the divided image data obtained by dividing the entire image data into a plurality of parts. When the moving image data has a data amount of a division unit, the microcomputer 105 generates the divided moov data and records the divided moov file in the external memory 112. At this time, the divided image data may be recorded in advance in the external memory 112 by the process of step S1202. In this case, the microcomputer 105 executes padding after the divided image data recorded in the external memory 112 so that the head of the divided moov data is the cluster boundary of the external memory 112. As a result, the divided image data recorded in the external memory 112 becomes a divided image data file having a multiple size of the cluster. After that, the microcomputer 105 writes the divided moov data. The divided moov data is padded in advance so as to ensure cluster size alignment. The divided moov data is recorded in the external memory 112 as a file having a data amount that is a multiple of the size of the cluster. Therefore, the head of the next divided image data to be later recorded in the external memory 112 is the cluster boundary of the external memory 112. The divided image data is recorded in the external memory 112 as a divided moving image data file separate from the divided moov file by the above-mentioned padding. As a result, the divided moving image data file and the divided moov file can be recorded in the external memory 112 so as to be arranged alternately.

In step S1205, the microcomputer 105 determines whether or not the moving image imaging for generating the moving image stream file has been stopped or ended in the image pickup apparatus 1. The microcomputer 105 may determine that the moving image imaging is completed when, for example, the operation member 114 of the imaging device 1 operates the moving image imaging end button. If the moving image acquisition is not completed, the microcomputer 105 returns the process to step S1202. The microcomputer 105 repeats the process from step S1202 to step S1205 until the moving image imaging is completed. Video recording continues. When the moving image imaging is completed, the microcomputer 105 advances the process to step S1206. In step S1206, the microcomputer 105 executes the whole moov file generation process by using the whole moov data generated by repeating the process of step S1203 every time the divided moving image data is generated. The microcomputer 105 records the entire moov file including the entire moov data finally generated in step S1203 in the external memory 112. The details of the generation process of the entire moov file may be the same as in FIG. 7.

In step S1207, the microcomputer 105 executes a combination process of a plurality of files recorded in the external memory 112 by the above process. By the above processing, the external memory 112 records a plurality of divided moving image data files, a plurality of divided moov files, and an entire moov file. The external memory 112 uses the FAT file system. Therefore, the microcomputer 105 combines a plurality of files recorded in the external memory 112 by rewriting the FAT of the external memory 112. The method of file combination processing may be the same as that shown in FIG. For example, in FAT, the first divided moov file is described in the final cell of the entire moov file, and the first divided moving image data file is described in the final cell of the first divided moov file. The second divided moov file is described in the final cell of the first divided video data file, and the second divided video stream file is described in the final cell of the second divided moov file. By this combination processing, the microcomputer 105 can generate and record a moving image stream file in the external memory 112.

FIG. 13 is an explanatory diagram of a moving image stream file generated in the external memory 112 by the moving image stream file generation process in the second embodiment. When the microcomputer 105 executes the moving image stream file generation process of FIG. 12, the moving image stream file of FIG. 13 is generated and recorded in the external memory 112.

The moving image stream file of FIG. 13 has an entire moov atom 1301 and an overall header area 1302 of the entire mdat that constitute overall management information for streaming and reproducing the moving image data. After the entire header area 1302, the padding data 1303 is recorded up to the area that becomes the cluster boundary of the external memory 112. Further, in the moving image stream file of FIG. 13, after the padding data 1303, the first divided moov atom 1304, the first divided header area 1305, and the first mdat atom 1306 are recorded. After the first mdat atom 1306, the padding data 1307 is recorded up to the cluster boundary area of the external memory 112. Further, in the moving image stream file of FIG. 13, a second divided moov atom 1308, a second divided header area 1309, and a second mdat atom 1310 are recorded after the padding data 1307. After the second mdat atom 1310, padding data (not shown) may be recorded up to the cluster boundary area of the external memory 112.

In such a moving image stream file, the padding data 1303, 1307, the divided moov atom 1304, 1308, and the divided header areas 1305, 1309 are regarded as data areas that are not referenced from the entire moov atom 1301. Not referenced means that the area does not correspond to the data storage area calculated from stco and stsz stored in the entire moov atom 1301. On the other hand, the plurality of mdat atoms 1306 and 1310 are referred to as continuous data areas from the whole moov atom 1301. Further, in the divided moov atom 1304, 1308, stco and stsz for the divided image data stored in the mdat atom 1306, 1310 are constructed. Then, the size of the moving image data including the putting data from the padding data 1303 to the mdat atom 1310 is recorded in the entire header area 1302 of the entire mdat.

Further, the moving image stream file of FIG. 13 divides and records the moving image data into a plurality of divided moving image data, and further includes a plurality of divided management information for each divided moving image data. Moreover, the padding data 1303 and the divided moov atom 1304 are separately recorded before and after the cluster boundary in the external memory 112. Further, the padding data 1307 and the divided moov atom 1308 are separately recorded before and after the cluster boundary in the external memory 112. Therefore, in the editing process for cutting out, for example, the mdat atom 1306 from the moving image stream file of FIG. 13, the mdat atom 1306 is cut out together with the divided moov atom 1304 and the divided header area 1305 which are the division management information. As a result, it is possible to cut out a file in which the image data of mdat atom 1306 can be streamed and reproduced. This file can be a split video stream file capable of streaming playback of the split video data of mdat atom 1105. In the editing process for cutting out a part of the moving image data, it is only necessary to cut out the range including the divided image data. There is no need to rebuild the split video stream file from scratch. The editing process for cutting out a part of the video data can be completed in a short time. Further, the moving image stream file of FIG. 13 can be easily divided into a plurality of divided moving image stream files and recorded by simply cutting out the moving image stream file with almost the same data structure. Therefore, when editing, copying, and transferring the moving image stream file of FIG. 13, a plurality of divided moving image stream files can be used instead. By using a plurality of divided video stream files, it can be expected that the processing time will be shortened.

As described above, in the present embodiment, as a generation means, the microcomputer 105 separately records a plurality of divided moving image data, divided management information, and overall management information corresponding to the moving image data for each cluster of the external memory 112. .. Specifically, using the padding data, the beginning of the plurality of divided video data, the beginning of the divided management information, and the beginning of the overall management information are separately recorded so as to be the positions of the cluster boundaries of the external memory 112. .. As a result, each divided moving image data is recorded separately for each cluster in the external memory 112, and a divided image stream file can be obtained simply by cutting out the cluster data. Moreover, the microcomputer 105 can generate an image stream file for streaming and reproducing the moving image data divided into a plurality of divided moving image data only by rewriting the FAT of the external memory 112.

Although the present invention has been described in detail based on the preferred embodiments thereof, the present invention is not limited to these specific embodiments, and various embodiments within the range not deviating from the gist of the present invention are also included in the present invention. included. The present invention supplies a program that realizes one or more functions of the above-described embodiment to a system or device via a network or recording medium, and one or more processors of the computer of the system or device reads the program. It can also be realized by the processing to be executed. The present invention can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

1 Imaging device (video file generator)
20, 31, 32 Video stream file 21 moov atom 22 mdat atom 105 Microcomputer 106 Volatile memory 112 External memory 1101,1301 Overall moov atom 1102, 1302 Overall header area 1103, 1106, 1304, 1308 Divided moov atom 1104, 1107, 1305, 1309 split header area 1105, 1108, 1306, 1310 mdat atom 1303, 1307 padding data

Claims (10)

The acquisition method for acquiring video data and
A control means for generating a moving image file including moving image data acquired by the acquisition means and controlling the generated moving image file to be recorded on a recording medium.
Have,
The control means is
The video data acquired by the acquisition means is divided into a plurality of divided video data, the plurality of divided video data, a plurality of divided management information corresponding to the plurality of divided video data, and overall management of the entire video data. Generate a video file containing information and
The plurality of division management information is generated so as not to be referred to from the overall management information.
Video file generator. The control means records the plurality of division management information in an area not referenced from the overall management information.
The moving image file generation device according to claim 1. The control means records the data size including the area of the plurality of division management information in the overall management information.
The moving image file generation device according to claim 1 or 2. The control means is
Every time the moving image data acquired by the acquisition means is divided and the divided moving image data is generated, the divided management information of the divided image data is generated, and the overall management information is updated.
The moving image file generation device according to any one of claims 1 to 3. The control means is
The plurality of divided moving image data, the plurality of divided management information, and the overall management information are recorded in different clusters of the recording medium, respectively.
The moving image file generation device according to any one of claims 1 to 4. The moving image file according to claim 5, wherein the control means adds padding data in order to record the plurality of divided moving image data, the plurality of divided management information, and the overall management information in different clusters. Generator. The control means converts the data sizes of the plurality of divided moving image data, the plurality of divided management information, and the plurality of clusters of the recording medium in which the overall management information is recorded into the overall management information of the moving image data. Record,
The moving image file generation device according to any one of claims 1 to 6. The control means is
The division management information includes metadata and still image data about the division video data corresponding to the division management information.
The moving image file generation device according to any one of claims 1 to 7. It is a method of generating a video file generator,
The acquisition process to acquire video data and
A control step of generating a moving image file including the moving image data acquired by the acquisition step and controlling the generated moving image file to be recorded on a recording medium.
Have,
The control step is
The video data acquired in the acquisition step is divided into a plurality of divided video data, the plurality of divided video data, a plurality of divided management information corresponding to the plurality of divided video data, and overall management of the entire video data. Generate a video file containing information and
The plurality of division management information is generated so as not to be referred to from the overall management information.
How to generate a video file generator. A program that causes a computer to execute the generation method of a video file generator.
The acquisition process to acquire video data and
A control step of generating a moving image file including the moving image data acquired by the acquisition step and controlling the generated moving image file to be recorded on a recording medium.
Have,
The control step is
The video data acquired in the acquisition step is divided into a plurality of divided video data, the plurality of divided video data, a plurality of divided management information corresponding to the plurality of divided video data, and overall management of the entire video data. Generate a video file containing information and
The plurality of division management information is generated so as not to be referred to from the overall management information.
program.

Images