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bash - How to demux audio and know what type it is? - Unix ...
https://unix.stackexchange.com/questions/27475/how-to-demux-audio-and-know-what-type-it-is
When muxing an audio into a video, ffmpeg, mencoder, etc require to know what the audio's encoding is. The encoder typically uses the file name's extension as the "parameter". eg. .aac However, when the audio to be muxed is being demuxed from another video, how can I determine the encoding type in a script?
MEncoder - LinuxTVWiki
https://www.linuxtv.org/wiki/index.php/MEncoder
$ mencoder -ovc copy -oac copy -o stream.ts dvb://"STREAM NAME" This will copy the video (-ovc) and audio (-oac) streams to the file stream.ts . Transcoding the file to XviD An MPEG-TS dump of a DVB stream is extremely large (~1GB for 30 minutes). MEncoder will also allow you to transcode the stream dump into something more useful, like XviD.
mencoder(1): movie encoder - Linux man page
https://linux.die.net/man/1/mencoder
A value of 0 means capture and buffer audio and video together (default for MEncoder). A value of 1 (default for MPlayer) means to do video capture only and let the audio go through a loopback cable from the TV card to the sound card. mjpeg Use …
[Ffmpeg-user] demux ts in one operation to keep audio ...
https://ffmpeg-user.ffmpeg.narkive.com/dDwN7uNd/demux-ts-in-one-operation-to-keep-audio-video-sync
of sync. Is there a way I can use ffmpeg, or mencoder or mplayer to demux a transport stream in one operation and keep the video in sync with the audio? I know how to run the commands separately twice, once for audio and once for video, but this leads to bad sync at the beginning of the files, and very very bad sync at the end of the file.
7.7. Using MEncoder to create QuickTime-compatible files
http://www.mplayerhq.hu/DOCS/HTML/en/menc-feat-quicktime-7.html
QuickTime 7 supports H.264 video and AAC audio, but it does not support them muxed in the AVI container format. However, you can use MEncoder to encode the video and audio, and then use an external program such as mp4creator (part of the MPEG4IP suite ) to remux the video and audio tracks into an MP4 container.
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