[mythtv-users] MPEG4 transcode - lost subtitles and additional audio tracks

Bill Williamson bill at bbqninja.com
Thu Mar 29 08:04:21 UTC 2007

On 3/29/07, Joan VallÚs <joan.valles at gmail.com> wrote:
> > Audio track wise its probably converting to whatever you told your
> transcoder to convert the audio to (MP3 perhaps?).  There is no option in
> mythtv to allow audio pass through and only transcode the video.  If you
> want that you'll have to setup a userjob and do external transcoding where
> you configure exactly what conversions should happen.
> Yes audio is converted to MP3, but that's not the problem, I'd like to know
> if there is a way to tell the transcoder to convert all the audio tracks and
> not only the first one.
> At this point I think I should ask first if MPEG-4 allows more than one
> audio stream and also, if mythtv can switch between them...

MPEG-4 is a video compression codec, not a container.  MKV (which
mythtv has horrible support for) supports multiple audio streams and
multiple subtitle streams.  AVI does not officially support multiple
audio streams, but has been "unofficially extended" to allow for it.

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