[MPlayer-users] mencoder / DVD / copy-options

[Nico Sabbi]

Volker Meyer wrote:

> Hi,
>
> I think I encountered a bug.
> I used the most recent CVS-version of mplayer/mencoder.
>
> Using a comandline like this:
> mencoder dvd://3 -aid 130 -ovc copy -oac lavc -of mpeg -ofps 23.976 -o 
> ecks.mpg -endpos 60
> produces a file, that works. Video and audio are in sync. Framerate, 
> when playing with mplayer is ok.
>
> Unfortunately, audio is encoded in mp2, which is not what I want.
> Since the DVD is in AC3 I tried this one:
> mencoder dvd://3 -aid 130 -ovc copy -oac copy -of mpeg -ofps 23.976 -o 
> ecks.mpg -endpos 60
> This also works, but the resulting file, when played has no audio, or 
> so it seems.
>
> Analyzing the file with
> ffmpeg -i ecks.mpg
> tells me that there is an audio track, but claims,  that this track is 
> in mp2. Therefore, I guess, mplayer uses the wrong codec and play the 
> file without audio.
>
> My guess is, that the "-oac copy" on the comandline does copy the AC3 
> stream, but writes the wrong codec information into the header of the 
> ecks.mpg file.
>
> Can that be true, or is something wrong with my comandline?
>
> The DVD-title is in progressive NTSC.
>
> Volker.
>
>

mencoder's mpeg muxer can properly mux only mp2 audio; all the other 
codecs  should
be stored as private stream (pes id=0xbd) but they are stored as regular 
mp2, hence the mess.

If you want ac3 save as avi and remux as dvd with avidemux.