A multi-channel synchronous playback method and device

Abstract

The invention discloses a multi-channel synchronous playback method and device: determine the playback time period and M channels that need to be multi-channel synchronous playback, M is a positive integer greater than 1; Find out the video file that matches with described playback time period in the file; According to the start time and the end time of each video file found out, determine respectively the channel as main channel in different sub-periods in the described playback time period, There are video files to be played back in the channel as the main channel in each sub-period; according to the determination result, multi-channel synchronous playback is performed according to the way of dynamically switching the main channel in different sub-periods. The application of the scheme of the present invention can improve the search efficiency of video files and the like.

Description

technical field [0001] The invention relates to the field of video monitoring, in particular to a multi-channel synchronous playback method and device. Background technique [0002] Existing digital video recorders (DVR, Digital Video Recorder) etc. all have multi-channel synchronous playback function. Multi-channel refers to multiple video channels of the DVR, and one channel represents one channel; synchronous playback means that the video files of multiple channels can be played back at the same time at the same time, and the playback time of each channel is synchronized with the main channel; correspondingly, the main channel A channel refers to a channel used as a reference standard during multi-channel synchronous playback. [0003] The multi-channel synchronous playback technology is mainly used for searching a large number of video files. For example, if an abnormal situation occurs during the time period from 1:00 to 3:00, then it is necessary to play back the vid...

AI Technical Summary

Problems solved by technology

[0006] In this way, if there is always a video file to be played back in the main channel within the specified playback time period, then the video files of other channels can also be played back, but if there is no video file to be played back in the main channel Recording files, that is, if the main channel does not record in this sub-period, since the playback time of other channels needs to be synchronized with the main channel, even if there are video files to be played back in other channels, they will not be able to play back, thus reducing the recording time. File search efficiency

[0007] For example: the playback time period specified by the user is 1:00~3:00, and 16 channels are specified for playback at the same time, and channel 2 is designated as the main channel, but channel 2 is in the sub-period of 2:00~3:00 If there is no video file to be played back, the entire playback process can only end at 2:00. Correspondingly, the video files of other channels within the sub-period of 2:00-3:00 will not be able to be played back.

Images