A video access method for improving double-speed playback performance

Abstract

The present invention provides a kind of video access method that is used to improve double-speed playback performance, comprising: storage server establishes the I frame index table corresponding to each camera ID; X's target I-frame sequence and returns to the streaming server. The advantages are as follows: 1) The IO bandwidth, CPU requirements and memory requirements of the storage server are reduced, and the network bandwidth occupation between the storage server and the streaming media server is reduced. 2) At the same time, for the streaming media server, because there is no need to cache, decode, locate, frame skip, etc. the complete video stream, the performance consumption is reduced, the response speed of double-speed playback is improved, and the user experience is improved. 3) Since the I frame is finally returned to the player, the I frame is a complete picture frame, unlike the P frame, which is only a difference picture frame. Therefore, for the player, playing the I frame at double speed can guarantee the playback picture quality.

Description

technical field [0001] The invention belongs to the technical field of streaming media applications and video storage, and in particular relates to a video access method for improving double-speed playback performance. Background technique [0002] Video storage is a common business type in the field of security monitoring, and the most common application of video is real-time playback and playback. For the video playback business, double-speed playback is a very common business scenario. It is mostly used when an event occurs, and managers try to quickly find and locate the "picture" they care about through double-speed playback, so as to lock the video segment at the time of the event. for further analysis. [0003] From a technical point of view, for 2x speed video playback, frame skipping is usually used to achieve, that is: at the same playback frame rate, only the odd or even image frames of the original image frame sequence are played; for playback greater than 2x sp...

AI Technical Summary

Problems solved by technology

[0005] This technology mainly has the following problems: For the streaming media server, when performing X-speed playback, it is necessary to obtain video data equivalent to X times the original data volume per unit time, the processing capacity of the streaming media server, the number of buffers, and the streaming media The bandwidth between the server and the storage server, the processing power and the number of caches of the storage server, and the IO capability of the disk on the storage server must be correspondingly expanded to X times to realize this business.

Therefore, in actual projects, when the rate of double-speed playback is large (for example, greater than 4 times), it can be seen that the effect of double-speed playback is not good. Double speed and too many frame skips in the middle lead to poor picture continuity

[0006] It can be seen that when the rate of double-speed playback is high, from the storage server, streaming media server to the terminal player, its processing performance, cache capacity, network performance, etc. may become bottlenecks, which in turn affects the effect of double-speed playback

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