A method of rewinding video
A video and original video technology, applied in the computer field, can solve problems such as unreliable playback, slow decoding speed, stuck or blurred screen, etc., to solve the problem of stuck and blurred screen, save reading and writing time, and improve decoding speed Effect
Active Publication Date: 2018-06-08
BEIJING ICHINAE SCI & TECH CO LTD
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
This method consumes a lot of time in the process of searching for I frames and reading and writing buffer data, resulting in slow decoding speed. Therefore, there will be freezes or blurred screens during real-time playback, and smooth playback cannot be guaranteed. Stuck and blurry problems when playing backwards, the focus is to improve the decoding speed of reversed video
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0028] In one embodiment, a method for playing video backwards, comprising the following steps:
[0029] S1, the original video file is preprocessed to generate a new video file suitable for video playback; the preprocessing includes storing all I frames in the original video file in reverse order, and storing the I frame in the dependent on the I frame Before the P frame;
[0030] S2. Play forward the new video file.
[0031] Original video files such as figure 1 , wherein, I represents the key frame I frame, P represents the P frame, and the original video file is stored according to the following structure:
[0032] I1-P101-P102-P103...P124-I2-P201-P202-P203...P224...,
[0033] Take the data of I1-P101-P102-P103...P124 as an example, the original video file...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a video back-playing method. In the method, preprocessing is carried out on an original video file to generate a new video file; forward decoding is carried out on the new video file and then subjected to sequential playing, thus back-playing of the video can be realized. In the back-playing process, I frame is only subjected to decoding, but not playing. According to the invention, preprocessing is carried out on the original video file to generate the new video file, and in the video back-playing process with utilization of the new video file, time spent on I frame searching and buffer area reading and writing in the video back-playing process is saved, thereby substantially raising the decoding speed, guaranteeing the smoothness in the video back-playing process and solving problems of stopping, pausing and blurred screens in the video back-playing process.
Description
technical field [0001] The invention relates to the field of computers, in particular to a video playback method. Background technique [0002] At present, widely used video files mainly include several frame types of I frame and P frame. The I frame is called an intra-frame coded frame, which is an independent frame with all information. The first frame in a video sequence is always an I frame, which can be decoded independently without referring to other images. If the transmitted bit stream is corrupted, the I frame needs to be used as a new starting point or resynchronization point; the P frame is also called an interframe predictive coding frame, and the P frame cannot be independently decoded, and must refer to the previous I frame or P frames to be encoded. P-frames typically occupy fewer data bits than I-frames, but are very sensitive to transmission errors due to their complex dependencies on previous P- and I-frames. [0003] When playing a video, you must first...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/44H04N21/4402
CPCH04N21/44H04N21/4402
Inventor 周超韩珍
Owner BEIJING ICHINAE SCI & TECH CO LTD