Shot segmentation method based on X264 compressed video

Abstract

The invention relates to a shot segmentation method based on an X264 compressed video. The method comprises following steps: extracting frame numbers, frame types and intra-frame prediction macro-block proportions through a frame-by-frame decoding manner, wherein a group of pictures (GOP) of the X264 compressed video is employed as a unit; performing shot detection on I-frames of the GOP to be detected; determining whether the current I-frames generate an abrupt shot change according to the length of the GOP to be detected; taking the intra-frame prediction macro-block proportions of all P-frames of the GOP to be detected as sample data; determining whether shot segmentation is needed according to fluctuation degrees of the sample data; and performing shot segmentation based on the prediction macro-block proportions. By employing the method, the shot segmentation can be carried out on the compressed video whose GOP is unfixed in length and structure. When the shot segmentation occurs at the I-frames, in the prior art, the change of prediction macro-block proportions of adjacent frames of the I-frames are generally employed for detection, and the video is required to be constant is GOP length and structure. By employing the method, shot transition detection on the I-frames can be carried out only by the use of parameters of the I-frames.

Description

technical field [0001] The invention belongs to the field of video shot segmentation, and in particular relates to a shot segmentation method based on X264 compressed video. Background technique [0002] With the development of multimedia and Internet technology, on the one hand, people can conveniently enjoy various services such as video on demand and online viewing without leaving home, and the requirements for video services are getting higher and higher. On the other hand, the media industry has brought people information and entertainment for a long time, and the massive storage has also made the importance of media asset management increasingly prominent. Shot segmentation technology is of great significance to the solution of the above two problems. First of all, shot segmentation technology is the first step and one of the most important steps based on video content retrieval, and its accuracy will directly affect the effect of subsequent processing. Secondly, in ...

AI Technical Summary

Problems solved by technology

[0015] The GOP of X264 compressed video has no fixed length and structure, and the traditional compression domain shot segmentation method is not applicable

Images