Movie file downloading device and method
A file download and video technology, applied in electrical components, televisions, transmission systems, etc., can solve the problems of long waiting time, inability to realize the preview function of video files, discontinuous data slices, etc., to avoid waste.
Active Publication Date: 2011-09-21
TENCENT TECH (SHENZHEN) CO LTD
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In order to improve the download efficiency, the download client can download data pieces at different locations from multiple nodes in the node network at the same time, but this download mechanism will cause the downloaded data pieces to be discontinuous in file position, while The principle of decoding is that it is impossible to play discontinuous data blocks
Therefore, traditional downloading software often needs to download the movie completely before it can be watched. In this way, the user needs to wait for a long time, and cannot pre-judge whether the content of the movie meets his needs, nor can he preview the highlights of the movie in advance.
[0005] Judging from the existing file cutting methods, one frame of video frame data in a movie is often divided into two units, and at the same time it is impossible to locate the position of the key frame from which data piece, so it is difficult to download a movie file that has not been downloaded If the complete video frame is decoded, the preview function of the movie file cannot be realized, and the user must preview in sequence or download the complete movie file before viewing, thus causing a long waiting time; or because the downloaded movie is actually Can not meet the needs of users, resulting in a waste of download time
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[0032] Generally, video coding frames include two types: I frames and P frames. I frame is also called intra-frame reference frame or key frame. I frame only refers to the information in the image frame when encoding, so it can be decoded independently when decoding; and P frame is also called forward reference frame, P frame The information of the previous frame will be referred to during encoding, so the P frame also needs to have the data of the previous frame during decoding. When encoding a movie file, a key frame, namely an I frame, is generally inserted at intervals of several seconds, and the rest are P frames. In this way, decoding and playback can be started from the position of the key frame, and other forward reference frames can be decoded sequentially.
[0033] Because the key frame can be independently decoded, the key frame data has more important significance in the movie file data, generally, the position of the key frame data in the file can be recorded in t...
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The invention provides a movie file downloading device and method. The device comprises a file parsing module, a file slicing module, a network downloading module and a preview playing module, wherein the file slicing module is used for slicing a movie file according to key frame information received by the file parsing module; the network downloading module is used for downloading file data according to the file slicing information; and the preview playing module is used for quickly previewing movie contents by using the information. According to the scheme provided by the invention, a user is helped to quickly know summary contents of a movie, the aim of previewing interested content fragments in advance is fulfilled, and the waste of downloading time is avoided.
Description
technical field [0001] The invention relates to a video file processing technology, in particular to a video file downloading device and method. Background technique [0002] With the development of broadband Internet, the network video resources provided on the Internet are becoming more and more abundant. Downloading movies from the Internet has become a very common demand. At present, there are many downloading software that can meet the needs of users to download movie files. [0003] The protocols supported by general download software include Hypertext Transfer Protocol (HTTP), File Transfer Protocol (FTP), Bit Comet (BT) download protocol, file sharing network (ED2K (eMule), also known as "eDonkey2000 network") protocol, multimedia Messaging (MMS) protocol, real-time streaming protocol (RTSP), etc. Different download protocols have different download characteristics. Among them, HTTP and FTP are traditional file transfer protocols. Based on the Client / Server architec...
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IPC IPC(8): H04L29/08H04N7/26
CPCH04N21/8549H04N21/8456H04N21/47202H04N21/234
Inventor 刘俊
Owner TENCENT TECH (SHENZHEN) CO LTD
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