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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 / ffmpeg encoding conversion commands | Deepthought
http://www.deepthought.ws/media/encoding/mencoder-ffmpeg-encoding-conversion-commands/
mencoder / ffmpeg encoding conversion commands. The -oac copy option tells mencoder to just copy the audio stream (no reencoding). -ovc copy does the same with the video stream. The -idx option asks mencoder to build the index if none was found. This makes searching inside the video easier.
6.1. Selecting codecs and container formats
http://www.mplayerhq.hu/DOCS/HTML/en/menc-feat-selecting-codec.html
6.1. Selecting codecs and container formats. Audio and video codecs for encoding are selected with the -oac and -ovc options, respectively. Type for instance: mencoder -ovc help. to list all video codecs supported by the version of MEncoder on your machine. The following choices are available: Audio Codecs: Audio codec name.
7.8. Using MEncoder to create VCD/SVCD/DVD-compliant …
http://www.mplayerhq.hu/DOCS/HTML/en/menc-feat-vcd-dvd.html
If the source already has AC-3 audio, use -oac copy instead of re-encoding it. mencoder -oac copy -ovc lavc -of mpeg -mpegopts format=dvd:tsaf \ -vf scale=720:576,harddup -ofps 25 \ -lavcopts vcodec=mpeg2video:vrc_buf_size=1835:vrc_maxrate=9800:vbitrate=5000:\ keyint=15:vstrict=0:aspect=16/9 -o movie.mpg movie.avi
7.7. Using MEncoder to create QuickTime-compatible files
http://www.mplayerhq.hu/DOCS/HTML/en/menc-feat-quicktime-7.html
Now use mp4creator to create a new MP4 file out of the audio and video streams. mp4creator -create=narnia.aac narnia.mp4 mp4creator -create=narnia.h264 -rate=23.976 narnia.mp4. Unlike the encoding step, you must specify the framerate as a decimal (such as 23.976), not a fraction (such as 24000/1001).
mencoder(1): movie encoder - Linux man page
https://linux.die.net/man/1/mencoder
audio delay in seconds (positive or negative float value) Negative values delay the audio, and positive values delay the video. Note that this is the exact opposite of the -audio-delay MEncoder option. NOTE: When used with MEncoder, this is not guaranteed to work correctly with -ovc copy; use -audio-delay instead. -ignore-start
6.7. Stream copying
http://www.mplayerhq.hu/DOCS/HTML/en/menc-feat-streamcopy.html
For example, if you are converting an NSV file with AAC audio to an AVI container, the audio format tag will be incorrect and it will have to be changed. For a list of audio format tags, check codecs.conf. Example: mencoder input.nsv-oac copy -fafmttag 0x706D \ -ovc lavc -lavcopts vcodec=mpeg4:mbd=2:trell -o output.avi
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