[MPlayer-users] Encoding HDTV streams

[MichaelM]

Hey all.
I've been toying around with encoding HDTV, complete with AC3 streams. I 
grabbed a large chunk (about 3.5 GB), and encoded it to xvid using the 
following command:

mencoder stream.ts -vf scale=1280:720,dsize=16/9,pp=h1/v1/dr/al/lb -sws 
10 -oac copy -ovc xvid -xvidencopts 
pass=2:bitrate=4000:me_quality=6:vhq=4:chroma_me:qpel -o stream.avi

The "-oac copy" works, and I get an xvid file with ac3 audio.

However, if I just want to make another mpeg file like so :

mencoder stream.ts -oac copy -ovc copy -of mpeg -o stream_1.mpg

there is no audio. Any idea why "-oac copy" works for xvid, but not 
standard mpeg ? I've used "oac copy" for streams with mp2 audio with no 
problems ...

I'll appreciate any help.