JP2022096304A - Moving image file transfer device, transfer system, transfer method for moving image file transfer device, and program - Google Patents

Abstract

To check the details of a moving image file including moving image data even during transfer of the file.SOLUTION: A moving image file transfer device 1 transfers a moving image file to an external device 200, and the moving image file transfer device creates a plurality of divided transfer files including pieces of divided moving image data obtained by dividing moving image data included in a moving image file to be transferred and management information on the divided moving image data, and transfers the plurality of divided transfer files and the management information included in the moving image file to the external device 200.SELECTED DRAWING: Figure 10

Description

The present invention relates to a moving image file transfer device, a transfer system, a transfer method of the moving image file transfer device, and a program.

Some information processing devices such as an image pickup device handle reproducible moving image data as in Patent Document 1. Further, in an information processing device such as an image pickup device, a moving image file containing moving image data obtained by streaming can be recorded on an external recording medium such as an SD card, and the moving image file of the recording medium is recorded on an external recording medium such as another computer device. There is something to transfer to the device. Such video data includes, for example, MP4 format video files standardized by ISO / IEC 14496-14: 2003. In the MP4 format video file, video data from the start to the end of imaging is recorded together with management information for (streaming) playback of the video data.

Japanese Unexamined Patent Publication No. 11-176083

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 reproduction time of the moving image data recorded in one moving image file tends to be long. An image pickup device or the like is also required to be able to record a moving image file containing moving image data for, for example, several hours or more. On the other hand, when transferring a video file containing video data having such a long playback time, the transfer takes time. In addition, the transfer destination external device cannot confirm the contents of the video data included in the video file until the transfer of the video file is completed. Therefore, when transferring a moving image file whose data size is large due to long-time shooting, it is not possible to check the content of the moving image data for a long time.

In order to solve the above-mentioned problems, the present invention is a video file transfer device capable of confirming the content of the video data of the video file being transferred even if the transfer is not completed in the transfer of the video file including the video data. The purpose is to provide a transfer method.

The moving image file transfer device for transferring the moving image file according to the present invention includes divided moving image data obtained by dividing the moving image data included in the moving image file to be transferred into a plurality of parts, and management information of the divided moving image data, respectively. It has a divided transfer file generation means for generating a plurality of divided transfer files, and a transfer means for transferring the plurality of divided transfer files and management information included in the moving image file to the external device.

In the present invention, it is possible to confirm the content of the moving image data of the moving moving image file even if the transfer of the moving image file including the moving image data is not completed.

It is a block diagram of the image pickup apparatus which has the moving image file transfer 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 transferred 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 whole moov file generation process of FIG. It is explanatory drawing of FAT processing for generating a moving image stream file. It is explanatory drawing of the video stream file generated in the external memory by the video stream file generation process. It is a flowchart of the transfer source processing of the moving image stream file in 1st Embodiment. It is a detailed flowchart of the generation process of the split transfer stream file of step S1304 of FIG. It is a flowchart of the transfer destination processing of the moving image stream file in 1st Embodiment. It is a detailed flowchart of the process of generating the split transfer stream file of step S1304 of FIG. 10 in the second 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, an operation member 114, and a communication member 115 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 sensor 101 converts the subject image imaged by the image pickup lens 100 into an analog moving image signal. The A / D converter 102 is connected to the image pickup device 101 and converts an analog moving image signal into a digital moving image 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, 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 communication member 115 transmits / receives data to / from an external device 200, which is another device, for example, by wireless communication or by wired communication using a cable. The communication member 115 may be provided with a data communication function conforming to standards such as IEEE802.15, IEEE802.11ax, and IEEE802.3. The external device 200 includes, for example, another image pickup device, a personal computer device, and a server device similar to those in FIG. 1. The transfer system 300 is composed of the external device 200 and the image pickup device 1.

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 moving image 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, a moving image data file including moving image data obtained by imaging 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 generate management information for streaming and reproducing the moving image data obtained by imaging, and may record the moving image stream file including the management information in the external memory 112. As a result, the external memory 112 records a moving image stream file containing the moving image data captured by the imaging device 1 so that the moving image data can be streamed and reproduced.

In addition to this, for example, when playing a moving image, the microcomputer 105 may read the moving image stream file to be transferred from the external memory 112 and transmit the moving image stream file to the external device 200 by using the communication member 115. As a result, the image pickup device 1 can transfer the recorded moving image stream file to and from another device.

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 all the video data stored in the video 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. The microcomputer 105 generates a plurality of divided moving image data files in the external memory 112 for dividing and recording the moving image data obtained by imaging into a plurality of divided image data. The microcomputer 105 appropriately saves the moving image data in the volatile memory 106 into a divided moving image data file. In step S503, the microcomputer 105 executes a process of generating whole moov data for the whole moving image data. Details of the overall moov data generation process will be described later in FIG.

In step S504, 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 is the amount of data to be divided as the divided image data, 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 file may be recorded in advance in the external memory 112 by the process of step S502. In this case, the microcomputer 105 executes padding after the divided image data file 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 file recorded in the external memory 112 becomes 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 recorded from 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 S505, 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 process from step S502 to step S505 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 S506. In step S506, the microcomputer 105 executes the whole moov file generation process using the whole moov data generated by repeating the process of step S503 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 S503 in the external memory 112. Details of the generation process of the entire moov file will be described later in FIG.

In step S507, 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 details of the file combination process may follow the example of FIG. 8 described later. 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 video 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 video file. By this combination processing, the microcomputer 105 can generate and record a moving image stream file in the external memory 112.

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 video codec 108 and the like to generate video data that can be used for streaming playback. The moving image codec 108 or the like 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 moving image codec 108 or the like 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 S506 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 an overall 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 imaged moving image data from the beginning to the end is recorded in the external memory 112.

FIG. 8 is an explanatory diagram of an example of FAT processing for generating a moving image stream file. In the example of FIG. 8, in the external memory 112, a moving image data file including the captured moving image data in a format that can be streamed and reproduced, and a video file about the moving image data are recorded. In step S507, 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 moov file for the video stream file and the video data file are written in addition to the video data file. As shown as a point region in FIG. 8 (b), the moov file is recorded in a third cluster of external memory 112. The first half of the 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 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 moov file is recorded. As a result, it is recorded in the FAT of the external memory 112 that one 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 S507. 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 moov file cluster is located after the video stream file cluster. 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 S507, the microcomputer 105 rewrites the FAT and combines the moving image data file and the moov file recorded in the external memory 112. After the combination, the microcomputer 105 executes the combination process so that the 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 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, moov data is included at the beginning of the file. Video data is included after the 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 moov file, MVI_0001. It will be written to continue after MP4.

FIG. 9 is an explanatory diagram of a video stream file generated in the external memory 112 by the video stream file generation process. When the microcomputer 105 executes the moving image stream file generation process of FIG. 4, the moving image stream file of FIG. 9 is generated and recorded in the external memory 112.

The moving image stream file of FIG. 9 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. 9, the first divided moov atom 1304, the first divided header area 1305, and the first mdat atom 1306 are recorded after the padding data 1303. 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. 9, 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. 9 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. 9, it is possible to cut out the mdat atom 1306 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. 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. 9 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. 9, 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.

By the way, the moving image stream file thus generated so as to be streamably reproducible in the external memory 112 may be transferred from the image pickup apparatus 1 to the external apparatus 200. When the amount of data in the video stream file is large, the transfer process takes time. In particular, the capacity of external recording media has increased in recent years. In addition, opportunities for live video transmission are increasing. Due to these factors, the reproduction time of the moving image data recorded in one moving image stream file tends to be long, and the transfer process also takes time. Further, at the transfer destination, for example, the external device 200, the contents of the moving image data included in the moving image stream file cannot be confirmed until the transfer of the moving image stream file is completed. For this reason, regarding the transfer of a moving image stream file whose data size has become large due to long-time shooting, even if the transfer is started, the contents of the moving image data cannot be confirmed for a long time thereafter. Next, the transfer processing of the moving image stream file in the present embodiment, which can be expected to improve the efficiency of such transfer processing, will be described. By using the video stream file transfer process in the present embodiment, even if the video stream file transfer is not completed, the transfer destination, for example, the external device 200 confirms the content of the video data of the video file being transferred. It becomes possible.

FIG. 10 is a flowchart of the transfer source processing of the moving image stream file in the first embodiment. The microcomputer 105 of the image pickup apparatus 1 of FIG. 1 executes the transfer source process of FIG. 10 in order to transfer the moving image stream file generated by the image pickup apparatus 1 from the communication member 115 to the transfer destination external device 200. .. In the external memory 112 of the image pickup device 1 of FIG. 1 which is the transfer source, the moving image stream file generated by the image pickup device 1 by the image pickup device 1 is recorded by using the FAT (FAT Allocation Table) file system.

In step S1301, the microcomputer 105 determines whether or not to divide and transfer the moving image stream file to be transferred. Whether or not to perform split transfer may be determined based on, for example, information such as the amount of data which is the size of the video stream file and the playback time included in the video stream file as management information. Further, whether or not to perform split transfer may be determined based on the setting by the user. If it is determined that the transfer is divided, the microcomputer 105 advances the process to step S1302. If it is determined that the transfer is not divided, the microcomputer 105 advances the process to step S1308.

From step S1302, the microcomputer 105 starts a process for dividing and transferring the video stream file. First, the microcomputer 105 calculates the number of files of the divided transfer stream file for which the moving image stream file is divided and transferred. For example, when the moving image data is to be divided and transferred every 30 minutes, the microcomputer 105 divides the 80-minute moving image data into three divided transfer moving image data of 30 minutes, 30 minutes, and 20 minutes. In this case, the microcomputer 105 calculates 3 as the number of files of the divided transfer stream file.

In step S1303, the microcomputer 105 separates the header portion from the video stream file to be transferred, and obtains the video data of the video stream file to be transferred. The microcomputer 105 is separated, for example, at the boundary portion between the entire moov data and the mdat immediately after that. In this case, at least the overall management information is separated as the header part.

In step S1304, the microcomputer 105 generates a split transfer stream file that includes a part of the image data of the moving image stream file to be transferred so that it can be streamed and played back. Details of the split transfer stream file generation process will be described later in FIG.
The microcomputer 105 generates a plurality of divided transfer stream files as a divided transfer file generation means. The divided transfer stream file includes each of the divided moving image data obtained by dividing the moving image data of the moving image stream file to be transferred into a plurality of pieces so that the moving image data can be streamed and played back.

In step S1305, the microcomputer 105 transfers the split transfer stream file generated in step S1304. The communication member 115 transmits the divided transfer stream file to the external device 200. As a result, the external device 200 can receive the divided transfer stream file from the image pickup device 1 shortly after the transfer of the moving image stream file is started in the image pickup device 1. The external device 200 can reproduce, for example, a received split transfer stream file, and reproduce and confirm a part of the image data of the moving image stream file. For example, when the moving image stream file is divided into three and transferred, the waiting time until the external device 200 can confirm the file is reduced to about one-third.

In step S1306, the microcomputer 105 determines whether or not the divided transfer of the image data of the moving image stream file to be transferred is completed. If the split transfer is not completed, the microcomputer 105 returns the process to step S1304. The microcomputer 105 repeats the processes of steps S1304 to S1306 until it is determined that the divided transfer is completed, and transmits a plurality of divided transfer stream files in order. Then, when the number of repetitions becomes the same as the number of files in step S1302, the microcomputer 105 determines that the divided transfer is completed, and proceeds to the process in step S1307. During this time, the image data of the moving image stream file to be transferred is divided into a plurality of divided transfer stream files and transferred to the external device 200.

In step S1307, the transfer of all of the plurality of divided transfer stream files corresponding to the moving image stream files to be transferred is completed. The microcomputer 105 generates a header file including the header portion separated in step S1303 and transfers it to the external device 200. As a header file generation means, the microcomputer 105 generates and transfers a header file separately from the divided transfer stream file. The header file may be a file that does not include the divided moving image data, although the header file contains management information for collectively streaming playback of a plurality of divided moving image data included in the divided transfer stream file. The communication member 115 transmits the header file to the external device 200. As a result, the external device 200 can receive all the data about the moving image stream file that the image pickup device 1 was about to transfer. After that, the microcomputer 105 ends this process.

Step S1308 is a process executed when the moving image stream file to be transferred is not divided and transferred. The microcomputer 105 transfers the moving image stream file to be transferred as it is. The communication member 115 transmits the moving image stream file to the external device 200. As a result, the external device 200 can receive the moving image stream file from the image pickup device 1.

FIG. 11 is a detailed flowchart of the process of generating the split transfer stream file in step S1304 of FIG. The microcomputer 105 generates a plurality of divided transfer stream files by dividing the moving image stream file to be transferred by executing the generation process of FIG. 11 in step S1304 of FIG. In step S1401, the microcomputer 105 determines the division position for the moving image data of the moving image stream file determined to be divided and transferred in step S1301 of FIG. For example, when the 80-minute video data is divided into three divided transfer stream files of 30 minutes, 30 minutes, and 20 minutes, the microcomputer 105 divides the video data so that the boundary of each division is the boundary position of 1 Chunk. The position may be determined.

In step S1402, the microcomputer 105 generates a moving image file header corresponding to the division position determined in S1401. The video file header is management information for streaming and playing the divided video data. The microcomputer 105 extracts the file offset and the data size of the divided video data based on the header information of the video stream file separated in step S1303. As a result, the microcomputer 105 can reconstruct the moving image file header corresponding to the determined division position. In step S1403, the microcomputer 105 cuts out the divided moving image data divided at the divided position determined in S1401 from the moving image stream file. The divided moving image data may include both moving images and audio. The microcomputer 105 generates and adds a header of the mdat atom to the beginning of the divided moving image data in order to reconstruct the divided moving image data into an atom structure having an mdat configuration. In step S1404, the microcomputer 105 combines the moving image file header generated in S1402 with the divided moving image data generated in S1403 to generate one divided transfer stream file. As described above, the microcomputer 105 of the image pickup apparatus 1 does not transfer the moving image stream file as it is when trying to transfer the moving image stream file as a transfer member. Instead, the microcomputer 105 sequentially transfers a plurality of divided transfer stream files generated for the moving image stream file to be transferred. Further, the microcomputer 105 transfers a header file that does not include the divided moving image data after transferring a plurality of divided transfer stream files.

FIG. 12 is a flowchart of the transfer destination processing of the moving image stream file in the first embodiment. The external device 200, in which the moving image stream file is separately transferred from the image pickup device 1 to a plurality of divided transfer stream files and header files, executes the transfer destination process of FIG. 12. The external device 200 may be, for example, the same as the image pickup device 1 of FIG. In this case, the microcomputer 105 of the image pickup apparatus 1 as the external apparatus 200 executes the transfer destination process of FIG. Such an image pickup apparatus 1 can transfer a moving image stream file to another device and receive the transfer of the moving image stream file from the other device.

In step S1601, the microcomputer 105 of the external device 200 transmits a transfer request for the moving image stream file to the image pickup device 1 of the transfer source. The transfer request is transmitted from the communication member 115 of the external device 200 of the transfer destination to the communication member 115 of the image pickup device 1 of the transfer source. Upon acquiring the transfer request, the microcomputer 105 of the image pickup device 1 of the transfer source executes the transfer source process of the moving image stream file of FIG. The microcomputer 105 of the image pickup apparatus 1 of the transfer source starts to generate a plurality of divided transfer files and header files for the moving image stream file related to the transfer request and transfer them in order. In step S1602, the microcomputer 105 of the external device 200 receives the file transferred by the image pickup device 1 of the transfer source.

In step S1603, the microcomputer 105 of the external device 200 determines whether or not the header file has been received. If the header file has not been received, the microcomputer 105 of the external device 200 returns the process to step S1602. The microcomputer 105 of the external device 200 repeats the processes of steps S1602 to S1603 to receive a plurality of divided transfer files and header files to be sequentially transferred by the image pickup device 1 of the transfer source. Upon receiving the header file, the microcomputer 105 of the external device 200 advances the process to step S1604. In step S1604, the microcomputer 105 of the external device 200 combines a plurality of files sequentially transferred by the image pickup device 1 of the transfer source to generate a combined file. At this time, the microcomputer 105 of the external device 200 separates the divided moov data and the mdat data of each transferred divided transfer file, for example. The microcomputer 105 of the external device 200 combines the mdat data other than the divided transfer file at the beginning of reproduction after the mdat data of the divided transfer file at the beginning of reproduction in the order of reproduction. The microcomputer 105 of the external device 200 rewrites the data size described in the header of the mdat data at the beginning of the reproduction to the size after the combination. The microcomputer 105 of the external device 200 combines the header file with the combined mdat data. The header file is preferably combined before the combined mdat data. As a result, the moving image stream file related to the transfer request is reconstructed in the external device 200. As described above, in the external device 200, the communication member 115 as the transfer member is subjected to the split moving image after the plurality of divided transfer stream files including the divided moving image data from the image pickup device 1 of the transfer source which is another device. Header files that do not contain data are transferred. As an integration means, the external device 200 combines a plurality of transferred split transfer stream files and a header file, and generates one moving image stream file as a result of the integration. This video stream file is an example of an integrated video file.

As described above, in the present embodiment, when the video stream file is transferred, instead of transferring the video stream file as it is, a plurality of divided transfer stream files are transferred in order. The plurality of divided transfer stream files include each of the divided moving image data obtained by dividing the moving image stream file into a plurality of divided video stream files so that they can be streamed and played back. As a result, the split transfer stream file containing a part of the split video data so that it can be streamed is transferred to the transfer destination external device 200 before all the video data included in the video stream file is transferred. .. The transfer destination external device 200 can stream and reproduce a part of the divided video data before the video data included in the video stream file related to the transfer is transferred. The transfer destination external device 200 can start checking the contents of the video data at an early stage without waiting until all the video data included in the video stream file related to the transfer is transferred. Further, in the present invention, the transfer member generates a header file for collectively streaming and playing a plurality of divided moving image data included in a plurality of divided transfer stream files after transferring a plurality of divided transfer stream files. And transfer. The header file contains the overall management information, but does not include the divided video data. The header file is generated and transferred separately from the split transfer stream file. In the transfer destination external device 200, it is difficult to determine that the transfer instead of the moving image stream file is completed only by transferring the plurality of divided transfer stream files in order. In the present invention, after transferring a plurality of divided transfer stream files, a header file that does not include the divided moving image data is transferred. The transfer destination external device 200 can easily determine that the transfer instead of the moving image stream file has been completed by transferring the header file that does not include the divided moving image data. In the present invention, in the transfer destination device when the video file is transferred between a plurality of devices, the video stream being transferred without waiting until all the video data included in the video file related to the transfer is transferred. You can check the contents of the video data in the file.

[Second Embodiment]
Next, the image pickup apparatus 1 having the moving image file transfer 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. In the present embodiment, the method of dividing the moving image data of the moving image stream file of FIG. 9 into the divided moving image data of a plurality of divided transfer files for transfer is different from the above-described embodiment. In the present embodiment, specifically, each of the plurality of video data files and the plurality of divided moov files of the video stream file of FIG. 9 is divided by utilizing the fact that each of them is a unit of a cluster of external memory 112. The transfer file generation process is simplified.

FIG. 13 is a detailed flowchart of the process of generating the split transfer stream file in step S1304 of FIG. 10 in the second embodiment. The microcomputer 105 of the image pickup apparatus 1 of FIG. 1 executes the transfer source process of FIG. 10 in order to transfer the moving image stream file generated by the image pickup apparatus 1 from the communication member 115 to the transfer destination external device 200. .. Then, in step S1304 of FIG. 10, the microcomputer 105 of the image pickup apparatus 1 executes the process of generating the divided transfer stream file of FIG.

In step S1501, the microcomputer 105 determines the cluster boundary of the external memory 112 as the division position. In step S1502, the microcomputer 105 cuts out the divided moving image data up to the divided position determined in step S1501 and generates a divided transfer file including the divided moving image data.

The microcomputer 105 repeats the processes from step S1501 to step S1502 of FIG. 13 by repeating the process of step S1304 of FIG. For example, when the process of step S1304 of FIG. 10 is executed for the first time, the microcomputer 105 determines in step S1501 the cluster boundary C2 as the rear end of the first divided image data as the divided position. In step S1502, the microcomputer 105 cuts out the data from the cluster boundary C1 with the file header for the moving image stream file of FIG. 9 to the determined division position C2, and generates a division transfer file including the data. The cutout region includes a first split moov atom 1304, a first split header area 1305, and a first mdat atom 1306. Therefore, the first divided transfer file including the data in the cutout area is an MP4 format moving image file capable of streaming and playing the divided moving image data of the first mdat atom 1306. The microcomputer 105 is a first split transfer file that includes the cut out split video data in a streamable playable manner without performing a file reconstruction process so that the cut out split video data can be streamed and played back. Can be generated.

Further, when the process of step S1304 of FIG. 10 is executed for the second time, the microcomputer 105 determines in step S1501 the cluster boundary C3 as the rear end of the second divided image data as the divided position. In step S1502, the microcomputer 105 cuts out the data from the cluster boundary C2, which is the previously determined position for the video stream file of FIG. 9, to the newly determined division position C3, and generates a division transfer file containing the data. do. The cutout region includes a second split moov atom 1308, a second split header area 1309, and a second mdat atom 1310. Therefore, the second divided transfer file including the data in the cutout area becomes an MP4 format moving image file capable of streaming and playing the divided moving image data of the second mdat atom 1310. The microcomputer 105 is a second split transfer file that includes the cut out split video data in a streamable playable manner without performing a file reconstruction process so that the cut out split video data can be streamed and played back. Can be generated.

The microcomputer 105 repeats the process of step S1304 in FIG. 10 until the end of the moving image stream file, and repeats the processes from step S1501 to step S1502 in FIG. As a result, all the moving image data included in the moving image stream file of FIG. 9 is included in the plurality of divided transfer files and transferred to the external device 200. After that, in step S1307 of FIG. 10, the microcomputer 105 transfers the file header including the overall management information of the moving image stream file of FIG. 9 to the external device 200 as a header file.

As described above, in the present embodiment, the image pickup apparatus 1 records a moving image stream file including a file header as overall management information in order to stream and reproduce the entire moving image data together with the moving image data obtained by imaging, as an external memory as a recording member. Record at 112. Then, the microcomputer 105 of the image pickup apparatus 1 generates a header file including the overall management information separately from the divided transfer stream file as a header file generation means. Further, in the present embodiment, in the moving image stream file recorded in the external memory 112, the moving image data is divided into a plurality of divided data. Then, the microcomputer 105 of the image pickup apparatus 1 generates and transfers a divided transfer stream file including the divided moving image data in the external memory 112 in units of clusters so that it can be streamed and reproduced as the divided transfer file generation means. Further, in the present embodiment, the moving image stream file recorded in the external memory 112 includes a plurality of divided management information for streaming and reproducing each of the plurality of divided moving image data so as not to be referred to from the overall management information. .. Then, the microcomputer 105 of the image pickup apparatus 1 generates a divided transfer stream file including the divided moving image data and the divided management information in the external memory 112 as the divided transfer file generation means. Thereby, in the present embodiment, the microcomputer 105 of the image pickup apparatus 1 can easily generate a divided transfer file including the cut out divided moving image data so that it can be streamed and reproduced without executing the process of reconstructing the file.

Further, the microcomputer 105 of the external device 200 at the transfer destination combines a plurality of files sequentially transferred by the image pickup device 1 at the transfer source in step S1604 of FIG. 12 to generate a combined file. At this time, the microcomputer 105 can generate the data of the original moving image stream file of FIG. 9 by simply combining the transferred data of the plurality of divided transfer files and the data of the header file so as to be concatenated. When combining a plurality of files, the microcomputer 105 of the external device 200 at the transfer destination does not need to reconstruct the information for making the moving image data streamable and playable.

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 transfer device)
20 Video stream file 31 Video stream file 32 Video stream file 21 moov atom 22 mdat atom 105 Microcomputer 106 Volatile memory 112 External memory (storage member)
115 Communication member (transfer member)
200 External device 300 Transfer system 1301 Overall moov atom 1302 Overall header area 1303, 1307 Padding data 1304, 1308 Divided moov atom 1305, 1309 Divided header area 1306, 1310 mdat atom

Claims (8)

A video file transfer device that transfers video files to an external device.
A split transfer file generation means for generating a plurality of split transfer files, each of which includes split video data obtained by dividing the video data included in the video file to be transferred into a plurality of divided video data and management information of the divided video data.
A transfer means for transferring the plurality of divided transfer files and management information included in the moving image file to the external device, and
Have,
Video file transfer device. The transfer means transfers the management information included in the moving image file after transferring the plurality of divided transfer files.
The moving image file transfer device according to claim 1. It has a recording means for generating and recording a moving image file including the moving image data acquired by imaging and the overall management information of the moving image data on a recording medium.
When transferring the moving image file recorded on the recording medium, the divided transfer file generation means generates a plurality of divided transfer files from the moving image file, and the transfer means includes the plurality of divided transfer files and the plurality of divided transfer files. Transfer the overall management information of the moving image file to the external device.
The moving image file transfer device according to claim 1 or 2. The recording means records the moving image file in a state where the moving image data is divided into a plurality of parts.
The divided transfer file generation means generates the plurality of divided transfer files from the divided moving image data recorded in the moving image file in the divided state.
The video file transfer device according to claim 3. It has a header file generation means for generating a header file that does not include the moving image data included in the moving image file but includes the management information contained in the moving image file.
The transfer means transfers the plurality of divided transfer files and the header file to the external device.
The moving image file transfer device according to any one of claims 1 to 4. A transfer system that transfers files from a file transfer device to an external device.
The file transfer device is
A split transfer file generation means for generating a plurality of split transfer files, each of which includes split video data obtained by dividing the video data included in the video file to be transferred into a plurality of divided video data and management information of the divided video data.
It has a transfer means for transferring the plurality of divided transfer files and management information included in the moving image file to the external device.
The external device is
A playback method for playing the video data contained in the file, and
Based on the plurality of divided transfer files transferred by the transfer means and the management information of the moving image file, the management information of the divided transfer file is not included, and the plurality of divided moving image data and the management information of the moving image file are used. Has integrated means to generate integrated video files, including
Transfer system. It is a transfer method of a video file transfer device that transfers a video file to an external device.
A split transfer file generation process for generating a plurality of split transfer files, each of which includes split video data obtained by dividing the video data included in the video file to be transferred into a plurality of divided video data and management information of the divided video data.
A transfer step of transferring the plurality of divided transfer files and management information included in the moving image file to the external device, and
Have,
How to transfer a video file transfer device. A program that causes a computer to execute the transfer method of a video file transfer device that transfers a video file to an external device.
The transfer method of the video file transfer device is
A split transfer file generation process for generating a plurality of split transfer files, each of which includes split video data obtained by dividing the video data included in the video file to be transferred into a plurality of divided video data and management information of the divided video data.
A transfer step of transferring the plurality of divided transfer files and management information included in the moving image file to the external device, and
Have,
program.

Images