mpeg4 ts

Recently, a 3GP/MP4 Player uses FFMPEG to extract MPEG4 raw data from the Demux file of 3GP/MP4, which cannot be directly used for decoding. You need to add the vol header before the first frame. I copied the implementation of FFMPEG's encode_vol_header, and many files (especially qvga files) cannot be decoded. Finally, we learned that this vol does not need to be generated by ourselves. We only need to copy the data in avctx-> extradata_size to the f

In MPEG4 video, I-frame, p-frame, B-frame determination each frame of the MPEG4 is fixed at the beginning: B6, then how do we determine what frame the current frame belongs to? In the next 2bit, we will tell you the answer. Note: 2bit, not Byte, the following is the corresponding relationship between various types of frames and 2bit: 00:i Frame01:p Frame10:b Frame To better illustrate, let's take a few exam

MPEG4 the standard protocol. The Vop_time_increment_resolution in the Vol head and the Vop_time_increment in the VOP head together determine the frame rate used by the code stream. The Vop_time_increment_resolution in the Vol header, indicating the time resolution of the vop_time_increment. Its value actually represents the number of intervals 1 seconds are divided into. The vop_time_increment in the VOP header, which is defined in vol 1/vop_time_incr

In many movie download website title of the film we can see, such as "Assassination Hitler BD Version", "Flying Dragon Ribbon play Feng TS version" and so on, what do these abbreviations mean? What is the picture quality? Here are the specific meanings of each version:1. CAM (gun version)Cam is usually stolen from the cinema with a digital video camera. Sometimes a small tripod is used, but most of the time it is impossible to use, so the camera shake

searches for plugin from the Plugin-path specified in vlcrc and the modules and plugins directories in the current directory.Most VLC functions are implemented through plugin. By default, VLC has a large number of dynamic plug-ins. For example, the official VLC 0.8.6e has 210 plug-ins. To speed up startup, VLC caches the plugin list in % appdata % \ VLC \ cache. The plugins-Cache option is set to 0 to disable caching plugin.Open a UDP multicast stream. The default port is 4567.For the RTP proto

Statement 1: Although Isma and MPEG-2 ts over IP can be used for IPTV stream transmission, but due to the Mechanism and the original intention of different standards, there are some differences in IPTV service support, the specific analysis is as follows: 1. Support for business functions Isma currently supports MPEG-4 and H.264 and does not support other encoding standards. As video and audio streams are transmitted separately, Isma provides more fle

1. It should be said that the real understanding of TS, or to see a friend recommended "digital television business information and its code" after the book, MPEG2 TS and digital television is closely inseparable, it is worth summing up some of the relationship. Iso/iec-13818-1: System part;Iso/iec-13818-2: Video;Iso/iec-13818-3: Audio;ISO/IEC-13818-4: Conformance testing;ISO/IEC-13818-5: So

Live broadcasting: The existing Isma method. The process is as follows: Video collection-> video encoding-> RTP packaging-> UDP multicast; Audio collection-> Audio Encoding-> RTP packaging-> UDP multicast; The above is the workflow of mp4live. Live Video: mpeg ts stream mode. The process is as follows: Video collection --> video encoding --> Audio collection> Audio Encoding> TS packaging> RTP packaging> UDP

I recently encountered a headache caused by the IsDB code stream issue. I have found a lot of relevant materials to learn. The following is an excerpt from the Internet: It should be said that after truly understanding TS and reading the book "digital TV business information and coding" recommended by friends, MPEG2 TS and digital TV are closely inseparable, it is worth summarizing some of these relationsh

It should be said that after truly understanding TS and reading the book "digital TV business information and coding" recommended by friends, MPEG2 TS and digital TV are closely inseparable, it is worth summarizing some of these relationships. ISO/IEC-13818-1: System Section; ISO/IEC-13818-2: Video; ISO/IEC-13818-3: audio; ISO/IEC-13818-4: conformance testing; ISO/IEC-13818-5: Software section; ISO/IEC-1381

Prior to the establishment of Isma, the active image expert group defined the reuse of one or more audio, video, and data element streams when developing MPEG-2 system standards Method, MEPG-2 standards were officially released in November 1994. The data stream is packaged with a time mark to form a encapsulated element stream (PES ). Audio , Video and data (optional) PES are reused together to form a single output stream that can store and transmit applications. MPEG-2 system standards are desi

passes through the PES packager, it is converted into a PES package . The PES package consists of Baotou and payload , and the specific format is summarized as follows:You can see that Pts/dts is in the PES package , these two parameters is the key to solve the video-audio synchronization display, to prevent the decoder input cache overflow or underflow.PTS indicatesDisplay Unitappear inSystem Target Decoder(Std:system target decoder), DTS represents the timeAccess UnitAll bytestime to remove f

In MPEG-II standards, in order to combine one or more audio, video, or other basic data streams into one or more data streams for storage and transfer, it must be re-packaged and encoded. In the code stream, it also needs to insert various time tags, system control and other information, and finally sent to the channel encoding and modulation. In this way, two types of data streams, TS and PS, can be formed, which are suitable for different applicatio

FFmpeg Analysis of MPEG2 TS Stream decoding process [2] 5. Get betterWell, the previous foundation is nearly enough. It's a bit like a hand-peeled onion. Let's take a look at the aspect of MPEG ts.Resolution Process The code behind us is mainly concentrated in [libavformat/mpegts. C]. Grandpa Mao said: concentrated strengthWei Jie, well, let's get started, ant's nest. Static int mpegts_read_header (avformatcontext * s,Avformatparameters * AP){Mpegtsco

**************************************** **************************************** ********************I. Ts Encapsulation1. IntroductionMPEG2 transport stream (TS Stream) is a data stream defined according to the ITU-T Rec. h.222.0 | ISO/IEC 13818-1 protocol.To transfer and store the encoding data of one or more programs in an environment where serious errors may occur.

v/:* {behavior:url(#default#VML);}o/:* {behavior:url(#default#VML);}w/:* {behavior:url(#default#VML);}.shape {behavior:url(#default#VML);}--> Normal 0 7.8 磅 0 2 false false false MicrosoftInternetExplorer4 classid="clsid:38481807-CA0E-42D2-BF39-B33AF135CC4D" id=ieooui>st1/:*{behavior:url(#ieooui) }--> IP datagram consists of the first part and the data. The first part of the first part is a fixed length of 20 bytes, which is requi

The digital signal actually transmits data streams. Generally, the data streams include the following three types: ES is the original code stream, and contains the continuous code streams of video, audio, or data. Ts is a transmission stream consisting of 188 bytes in a fixed length. It contains one or more programs with independent time bases and is suitable for environments with many error codes. We all know that the

IntroductionEditWith the high-definition program from HDTV recorded on the internet, burning friends on the term TS is probably no stranger, but it is how to play, how to add subtitles and so on a series of questions, this article will focus on the application of this aspect of the operation. Let's start with a brief introduction to what is Mpeg2-ts. MPEG2 format Everyone through the contact with the DVD an

TS is all called mpeg2-ts, the abbreviation for "Transport Stream". The mpeg2-ts format is characterized by the requirement to decode independently from any segment of the video stream. Some website video is the TS format, the user downloads to the local need to carry on the processing to the file.How do I never downlo

(1) Es-elementary Streams (Original stream), the encoding of video, audio signals and other data is compressed into the data stream called the original stream. The original stream includes the access unit, such as the video source stream's access unit is a pair of image encoding data. (2) Pes-packetized Elementary Streams (the original stream of the group), the grouping of the original stream is called the PES grouping, is a data structure used to transmit the original flow (3) The program is a