System and method for frame-accuracy cutting of video material

Abstract

The invention discloses a system for video material frame-accuracy cutting, which comprises a video index creating module and a cutting frame image set recreating module, wherein the video index creating module extracts frame index information of each video frame of video material and saves the information at the tail part of the video material; and the cutting frame image set recreating module reads the frame index information at the tail part of the target video material, rapidly positions the cutting points of the target video material, decodes and re-codes the video frames of the cutting points and the relevant frames of the video frames, encapsulates the re-coded video frames in the original image set and modifies reference time information. The invention additionally discloses a method for frame-accuracy cutting by using the system. When the invention is adopted to conduct frame-accuracy cutting, the video frames of the cutting points or the video frames close to the cutting points are required to be re-coded only, and thereby the real-time frame-accuracy cutting of the video material is enabled to be more flexible, high-efficiency and accurate and the defects such as mosaics existing at the cutting points of the video material are avoided.

Description

technical field [0001] The invention relates to a video editing system, in particular to a system and method for frame-accurate editing of video materials. Background technique [0002] The inter-frame compression technology is widely used in the video field. It is characterized in that according to the similarity of adjacent video frames in the video sequence, the method of excluding redundant data is used for compression, thereby greatly improving the compression ratio. However, due to the use of inter-frame compression technology, the decoding of video frames may require data from adjacent frames or even adjacent image groups, which brings great difficulties to frame-accurate editing in video editing. Traditional editing methods can generally only achieve precise group-of-picture editing, but even for precise group-of-picture editing, if a non-closed group-of-picture is used, it will result in the first two video frames of the first group of picture after editing. Mosaic...

AI Technical Summary

Problems solved by technology

If it is necessary to modify the entry and exit points of the video material to be broadcast, or insert other video materials in a certain video material, and return to the inserted point to continue playing after the insertion, this requires the system to perform real-time frame-accurate editing of the video material. Otherwise, defects such as mosaics may appear at the in-point, out-point, insertion point, and return point of the video material, and in severe cases, the hardware decoder may not work properly