JP5498124B2 - Video storage conversion system and program - Google Patents

Description

  The present invention relates to a video accumulation conversion system for accumulating a video stream in a storage as a moving image file and generating a moving image file obtained by reading the accumulated moving image file and converting it into another video format. The present invention relates to a storage program and a conversion program to be executed.

  In recent years, content distribution servers and receiving terminals via a network have begun to spread. Along with this, various distribution platforms have appeared. However, each distribution platform often adopts a different video format. Therefore, a content provider is required to prepare a plurality of moving image files having different formats for the same content.

  In addition, video contents such as moving images and audio to be distributed are high definition and capacity is increasing. As a result, it is important to reduce the processing time required to store one content as a moving image file and convert it to another format from the viewpoint of quickly providing a video distribution service.

  In Patent Document 1, when a moving image stream desired by a receiving terminal is distributed from a position designated by the receiving terminal, a high-quality moving image stream is quickly converted from a desired frame and transmitted to the receiving terminal. Disclosed are a moving image distribution system, a conversion device, and a moving image distribution method.

International Publication No. 2008/142948 Pamphlet

  However, Patent Document 1 does not describe the viewpoint of shortening the processing time of the entire system from receiving a video stream to accumulating it as a moving image file and further converting the moving image file to another format.

  Further, in a conventional video storage / conversion system, it is common to perform moving image accumulation and moving image conversion sequentially. For this reason, it takes a long time until the converted video file can be provided to the distribution platform. In video format conversion, the conversion program reads the conversion source file from the beginning when the conversion source file (base storage file) has already been completed in the storage as a file, and the conversion source file This is because the format conversion is completed when the conversion up to the end of is completed, and the converted file (moving image file of another video format) is completed.

  Therefore, a method of shortening the processing time as a total system by executing moving image accumulation and moving image conversion in parallel is effective. However, in the parallel system, it is necessary for the conversion server to follow and read and convert the file being generated in which the storage server writes the video stream input from the encoder device to the storage. However, it is difficult to synchronize the processing speed of storing files with the storage server and the processing speed of converting files with the conversion server.

  The above-described problems include an encoder device that encodes a video signal, a storage server that stores a video stream received from the encoder device as a first moving image file, and a first moving image file that the storage server is storing. It is composed of a conversion server that converts the video format into a second video file and a storage server and a file server that stores the video file generated by the conversion server. A conversion file is generated / deleted by the video storage conversion system that continues or terminates the conversion from the first video file to the second video file based on the presence or absence of the write file. Solvable.

  In addition, the computer determines a stream reception unit that receives a video stream from the encoder, a video file storage unit that accumulates the received video stream as a video file in a file server, and determines the start and end timing of the storage, and prior to the start of the storage This can be solved by a program for generating a write file indicating the storage status in the file server and causing the file server to function as a management unit that deletes the write file upon completion of the storage.

  Furthermore, the video file reading unit that receives the video file stored in the file server, the video format conversion unit that converts the format of the video file and outputs it to the file server, and the storage status recorded in the file server are shown. This can be solved by a program for functioning as a control unit that determines the speed and timing of receiving a moving image file based on the written file.

  According to the present invention, the conversion speed in the conversion server can be adjusted by the conversion server determining whether the conversion is completed or reading is resumed after a certain period of time has elapsed.

It is a hardware block diagram of a video storage conversion system. It is a functional block diagram of a storage server. It is a functional block diagram of a conversion server. It is a functional block diagram of a file server. It is a hardware block diagram of a storage server / conversion server. It is a figure explaining the description content of a write file. It is a figure explaining the description content of an error file. It is a flowchart explaining operation | movement of a storage server. It is a flowchart (the 1) explaining operation | movement of a conversion server. It is a flowchart (the 2) explaining operation | movement of a conversion server.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings using examples. The same reference numerals are assigned to substantially the same parts, and the description will not be repeated. In the embodiment described below, a video stream such as a moving image or audio is stored as a moving image file in a storage such as a file server, and the stored moving image file is read to generate a moving image file converted into another video format. It is a storage conversion system.

  First, the hardware of the video storage conversion system 1000 will be described with reference to FIG. In FIG. 1, a video storage conversion system 1000 includes a video signal output device 101 such as a camera or a video playback device, a video signal cable 102, an encoder device 103, a LAN (Local Area Network) 104, a storage server 200, Conversion server 300, file server 400, two distribution servers 108 that provide video distribution services such as video-on-demand and download, public line 110 typified by the Internet, and video connected to public line 110 And n receiving terminals 111 capable of receiving and reproducing audio.

  The video signal output device 101 and the encoder device 103 are connected via a video signal cable 102. The encoder device 103, the accumulation server 200, the conversion server 300, the file server 400, and the distribution server 108 are connected via the LAN 104. Note that the network to be interconnected is not necessarily the LAN 104, and may be a public line network or the like as long as it can transmit and receive information.

The distribution server 108 and the receiving terminal 111 are connected via a public line 110. The receiving terminal 111 transmits a video distribution request. The distribution server 108 distributes video as a response to the video distribution request. The delivery server 108 and the receiving terminal 111, when distinguishing, delivery server 108 - A, the distribution server 108 - B, the receiving terminal 111 - a to the receiving terminal 111 - referred to as n.

  With reference to FIG. 2, functional blocks of the storage server 200 will be described. In FIG. 2, the storage server 200 includes a communication control unit 201, a stream reception unit 202, a moving image file storage unit 203, a schedule management unit 204, and a buffer memory 205.

  The communication control unit 201 transmits and receives information via the LAN 104. The stream receiving unit 202 receives a video stream from the communication control unit 201. The moving image file storage unit 203 outputs the received video stream to the file server 400 via the communication control unit 201 in order to store the received video stream as a moving image file. The buffer memory 205 temporarily stores the received stream.

  The schedule management unit 204 determines the timing for starting and ending accumulation. The schedule management unit 204 stores the write file in the file server 400 prior to the accumulation by the moving image file accumulation unit 203. In addition, when the storage of the moving image file storage unit 203 ends, the schedule management unit 204 deletes the write file of the file server 400. Furthermore, the schedule management unit 204 confirms a write error. When the writing error is detected, the schedule management unit 204 stores the error file in the file server 400.

  With reference to FIG. 3, the functional block of the conversion server 300 is demonstrated. In FIG. 3, the conversion server 300 includes a communication control unit 301, a moving image file reading unit 302, a moving image format conversion unit 303, a conversion control unit 304, and a buffer memory 305.

  The communication control unit 301 transmits and receives information via the LAN 104. The moving image file reading unit 302 reads a moving image file stored in the file server 400 via the communication control unit 301. The moving image format conversion unit 303 converts the format of the moving image or sound of the read moving image file to another format. The moving image format conversion unit 303 outputs the file format to the file server 400 via the communication control unit 201. The buffer memory 305 temporarily stores the read moving image file data.

The conversion control unit 304 determines the timing for starting and ending conversion based on the write file 407 of the file server 400. The conversion control unit 304 checks whether there is an error file 408 in the file server 400. When there is an error file 408, the conversion control unit 304 ends the conversion of the moving image format with an error. The conversion control unit 304 confirms whether the write file 407 exists in the file server 400. When the writing file 407 does not exist, the conversion control unit 304 normally ends the conversion of the moving image format.

A functional block of the file server 400 will be described with reference to FIG. In FIG. 4, the file server 400 includes a communication control unit 401, a file reading unit 402, a file writing unit 403, and a storage 404 .

  The communication control unit 401 transmits and receives information via the LAN 104. The file reading unit 402 reads a file from the storage 404. A file writing unit 403 writes a file to the storage 404. In addition, the storage 404 stores a moving image file A 405, a moving image file B 406, a writing file 407, and an error file 408. Here, the moving image file A 405 and the moving image file B 406 are moving image files having different formats.

  The hardware configuration of the storage server 200 and the conversion server 300 will be described with reference to FIG. In FIG. 5, the storage server 200 includes a central processing unit (CPU) 220, a main memory 230, a buffer memory 240, a NIC (Network Interface Card) 250, and an HDD (Hard Disk Drive) 260 connected to an internal bus 210. ing. The internal reference numbers in FIG. 5 are assigned the hardware reference numbers of the storage server 200. However, when referring to FIG. 5 as the conversion server 300, they are read as the internal bus 310, the CPU 320, the main memory 330, the buffer memory 340, the NIC 350, and the HDD 360, respectively.

  As is clear from FIG. 5, the storage server 200 and the conversion server 300 are computers. As apparent from the comparison between FIG. 2 and FIG. 5 and the comparison between FIG. 3 and FIG. 5, each functional block of the storage server 200 / conversion server 300 stores the storage program / conversion program recorded in the HDD 260/360 into the main memory 230. / 330 is read and executed by the CPU 220/320.

  The description content of the write file 407 will be described with reference to FIG. In FIG. 6, the write file 407 contains the accumulation start date and time 71, accumulation end date and time 72, the moving image file path 73 being written, the written file size 74, and the progress status 75. In some cases, the written file size 74 and the storage progress status 75 may not be written.

  The write file 407 is generated by the schedule management unit 204 immediately after accumulation of the moving image file 405 by the accumulation server 200 is started, and stored in the storage 404 of the file server 400. The write file 407 is deleted from the storage 404 of the file server 400 by the schedule management unit 204 immediately after the storage of the moving image file 405 by the storage server 200 is completed.

  The conversion server 300 checks whether the write file 407 on the storage 404 of the file server 400 exists. If not present, the conversion server 300 recognizes that the accumulation of the moving image file 405 by the accumulation server 200 has ended. When the write file 407 exists, the conversion server 300 recognizes that the generation of the moving image file 405 by the storage server 200 is continuing.

  The conversion control unit 304 of the conversion server 300 refers to the written file size described in the write file 407. Based on the reference result, the conversion control unit 304 compares the read file size of the moving image file 405 with the read speed by reducing the read size per time so that the storage server 200 cannot catch up with the writing of the moving image file A405. Adjust.

  The description content of the error file 408 will be described with reference to FIG. In FIG. 7, an error file 408 includes an accumulation start date / time 81, an accumulation end date / time 82, a movie file path 83 being written, an error code 84 for identifying an error that occurred during writing, An error content 85 which is a detailed content of the error is written. In some cases, the error code 84 or the error content 85 can be omitted.

  The error file 408 is generated by the schedule management unit 204 and stored in the storage 404 of the file server 400 when a file write error or the like occurs during the accumulation of the moving image file 405 by the accumulation server 200.

  The conversion server 300 checks whether the error file 408 on the storage 404 of the file server 400 exists. If it does not exist, the conversion server 300 recognizes that the accumulation of the moving image file 405 by the accumulation server 200 is normal. When the error file 408 exists, the conversion server 300 recognizes that an error has occurred in the accumulation of the moving image file 405 by the accumulation server 200 and ends the moving image format conversion.

  The operation of the storage server 200 will be described with reference to FIG. In FIG. 8, first, the storage server 200 determines whether or not the storage start date / time has arrived in the schedule management unit 204 (S701). If the accumulation start date / time has not arrived, the accumulation server 200 returns to Step 701. When the accumulation start date / time has arrived, the accumulation server 200 generates a write file 407 to the file server 400 (S702). Then, the storage server 200 starts writing the video stream received by the stream receiving unit 202 via the communication control unit 201 as a video file A405 to the file server 400 in the video file storage unit 203 (S703).

  The storage server 200 writes the moving image file A405 and checks whether an error has occurred (S704). When no error has occurred, the storage server 200 determines whether or not the storage end date / time has been reached (S707). When an error occurs in step 704, the storage server 200 generates an error file 408 in the file server 400 (S706), and the process proceeds to step 707. When NO in step 707, the storage server 200 transitions to step 704. When YES is determined in the step 707, the storage server 200 ends the writing of the moving image file A405 to the file server 400 (S708). The storage server 200 deletes the write file 407 of the file server 400 (S709) and ends.

  The operation of the conversion server 300 will be described with reference to FIG. In FIG. 9A, first, the conversion server 300 determines whether the conversion start date and time has arrived (S801). When NO, the conversion server 300 makes a transition again to step 801. If YES in step 801, the conversion server 300 starts reading the moving image file A405 from the file server 400 (S802). The conversion server 300 starts converting the moving image format of the read portion (S803). The conversion server 300 starts writing the converted portion to the file B 406 of the file server 400 (S804).

  In FIG. 9B, the conversion server 300 reads the moving image file A405, converts the moving image format, and writes the moving image file B406 (S806). The conversion server 300 confirms whether the error file 408 exists in the file server 400 (S807). The conversion server 300 determines whether or not the error file 408 exists (S808). When there is no error file 408, the conversion server 300 determines whether the end of the read file of the moving image file A405 (S809). If NO, the conversion server 300 proceeds to step 806 as it is. When YES is determined in the step 809, the conversion server 300 confirms the existence of the write file (S811). The conversion server 300 determines whether there is a write file (S812). If YES, the conversion server 300 proceeds to step 806 as it is. If NO in step 812, the conversion server 300 ends the moving image format conversion (S813) and ends. If YES in step 808, conversion server 300 proceeds to step 813 as it is.

  According to the embodiment described above, the conversion server 300 follows and reads and converts the moving image file being stored in which the storage server 200 writes the video stream input from the encoder device 103 to the storage 404 of the file server 400. When performing, it is possible to avoid both synchronization and realize both accumulation and conversion in parallel.

  The storage program and the conversion program can be recorded on a recording medium such as an optical disk or a hard disk. The processing program may be obtained via a network.

The preferred embodiments have been described above, but the invention is not limited to the embodiments and can be appropriately changed without departing from the spirit of the invention. The following embodiments are conceivable.
(1) Although the storage server 200 and the conversion server 300 are described as separate servers, the storage program and the conversion program may be mounted and operated in the same server.
(2) Although the file server 400 is described as an independent server, it is conceivable to store a moving image file, a write file, and an error file in a recording medium such as a hard disk in the storage server or the conversion server.
(3) Although the file server 400 holds and knows the moving image file A before conversion and the moving image file B after conversion, it may be held by separate file servers.

  DESCRIPTION OF SYMBOLS 101 ... Video signal output device, 103 ... Encoder device, 200 ... Storage server, 202 ... Stream receiving part, 203 ... Movie file storage part, 204 ... Schedule management part, 210 ... Internal bus, 220 ... CPU, 230 ... Main memory, 240 ... Buffer memory, 250 ... NIS, 260 ... HDD, 300 ... Conversion server, 302 ... Video file reading unit, 303 ... Video format conversion unit, 304 ... Conversion control unit, 310 ... Internal bus, 320 ... CPU, 330 ... Main Memory, 340 ... Buffer memory, 350 ... NIC, 360 ... HDD, 400 ... File server, 407 ... Write file, 408 ... Error file, 1000 ... Video storage conversion system.

Claims (5)

An encoder device that encodes a video signal; a storage server that stores a video stream received from the encoder device as a first video file in a file server; and the first server that is storing the video server in the file server . a conversion server for generating a second video file to convert the video files to other video formats, the second moving image file generated by the first video file and the conversion server that is generated by the storage server in the video storage conversion system composed of the said file server storing,
The accumulation server generates a write file indicating that the first moving image file is being accumulated in the file server, and deletes the written file when the accumulation of the first moving image file is completed. And
The conversion server continues the conversion from the first moving image file to the second moving image file when the writing file exists, and from the first moving image file to the second moving image when there is no writing file. A video storage and conversion system characterized by terminating the conversion to a video file. Computer
A stream receiver for receiving a video stream from the encoder;
A video file storage unit for storing the received video stream as a video file in a file server;
Determine the start and end timing of storage, generate a write file indicating the storage status in the file server prior to the start of storage, and end the conversion of the video stream to another video format upon completion of storage A management unit for deleting the write file to determine whether or not
Program to function as. The management unit further includes:
The program according to claim 2, wherein when a write error is detected, an error file for recording the occurrence of the error is generated in the file server. Computer
Movie file reading unit that receives movie files stored in the file server,
A video format conversion unit that converts the format of the video file and outputs the video file to the file server;
Based on the write file indicating the accumulation status recorded in the file server, the speed and timing of receiving the moving image file are determined, and the conversion of the format of the moving image file is terminated when the write file is deleted. Control unit,
Program to function as. The control unit further includes:
5. The process according to claim 4, wherein the process ends normally when the write file is not recorded on the file server, and ends with an error when an error file indicating the occurrence of a write error is recorded on the file server. program.

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