Video access method for improving speed-multiplying playing performance

Abstract

The invention provides a video access method for improving speed-multiplying playing performance. The video access method comprises the following steps: a storage server establishes an I-frame index table corresponding to each camera ID; and during video multi-speed reading, the storage server selects a target I-frame sequence conforming to the video playback multi-speed X and returns the target I-frame sequence to the streaming media server. The method has the advantages that 1) the IO bandwidth, the CPU requirement and the memory requirement of the storage server are reduced, and the network bandwidth occupation between the storage server and the streaming media server is reduced; and 2) for a streaming media server, because the complete video stream does not need to be subjected to caching, decoding, positioning, frame skipping and other processing, the performance consumption is reduced, the response speed of speed multiplication playing is improved, and the user experience is improved. and 3) the I frame is finally returned to the player, and the I frame is a complete picture frame instead of a P frame which is only a different picture frame, so that for the player, the I frame is played at a double speed, and the quality of the played picture can be ensured.

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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