Playback method and device for video files

Abstract

The invention provides a playback method for video files. The method comprises analyzing received code stream, extracting frame index information from the code stream, writing frame data in the code stream into the video files with collected information as names, and writing the frame index information into index files with the collected information as the names; obtaining the video files and the index files with the names matched with the collected information according to the collected information carried in playback requests; and reading the frame data stored in the video files according to playback speed information carried in the playback requests and the frame index information in the index files, and controlling playback of the frame data according to the playback speed of the requests. The invention further provides a playback device for the video files. The playback method and the playback device can improve real-time performance of playback and effectively controls the playback speed.

Description

technical field [0001] The invention relates to the field of video surveillance, in particular to a playback method and device for video files. Background technique [0002] figure 1 A flow chart of a method for on-demand playback of existing video surveillance recordings. Combine now figure 1 , the method for the on-demand playback of the existing video surveillance video is described, specifically as follows: [0003] Step 101: store the received video stream in real time, form a plurality of storage files whose file names include the video generation time, and the video duration stored in each storage file is less than or equal to the first predetermined duration; [0004] In this step, an index area is reserved at the beginning of each stored file, so that index information generated before playback can be added to the index area. In order to establish an index quickly, the first predetermined time period may be four minutes, five minutes or six minutes. [0005] St...

AI Technical Summary

Problems solved by technology

[0010] In the method for on-demand playback of existing video surveillance recordings, in order to be able to locate the playback video, the index file of the video file to be played back is established before the video file is played back after the video file is stored, in order to make the user feel that the playback process is The response time for indexing and the first preset duration corresponding to the stored video files can be set as short as possible, such as four minutes or five minutes, etc., which will lead to too many stored video files, and a large number of videos need to be searched for playback Files, a large number of comparisons have reduced the real-time performance of playback to a certain extent, and in the existing method for on-demand playback of video surveillance recordings, the speed of playback cannot be controlled, and further improvement is needed

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