[MPlayer-users] no sound while watching tv with mplayer

[Duane Evenson]

Me too!
Watching TV was OK, and I heard it while encoding. I finally found the 
problem and a work-around.
my command looked something like this:
mencoder -tv 
on:driver=v4l:width=640:height=480:norm=NTSC:chanlist=us-cable:channel=8 
-ovc lavc -lavcopts vcodec=mpeg4:v4mv -vop pp=lb -oac mp3lame -lameopts 
cbr:br=64 -endpos 5 -o vcr-test.avi

Upon upgrading, I first changed the line to this:
mencoder -tv 
driver=v4l:width=640:height=480:norm=NTSC:chanlist=us-cable:channel=8 
tv:// -ovc lavc -lavcopts vcodec=mpeg4:v4mv -vop pp=lb -oac mp3lame 
-lameopts cbr:br=64 -endpos 5 -o vcr-test.avi

but got no sound. Then I removed the lameopts:
mencoder -tv 
driver=v4l:width=640:height=480:norm=NTSC:chanlist=us-cable:channel=8 
tv:// -ovc lavc -lavcopts vcodec=mpeg4:v4mv -vop pp=lb -oac mp3lame 
-endpos 5 -o vcr-test.avi

and I got the following output:
...
MP3 audio selected
Building audio filter chain for 44101Hz/1ch/16bit -> 44101Hz/1ch/16bit...
Writing AVI header...
ODML: vprp aspect is 4:3.
Forcing audio preload to 0, max pts correction to 0
Pos:   5.0s    149f ( 0%)  29fps Trem:   0min   0mb  A-V:0.000 [865:0]]
Writing AVI index...
Fixing AVI header...
ODML: vprp aspect is 4:3.
 
Video stream:  865.661 kbit/s  (108207 bps)  size: 541580 bytes  5.005 
secs  149 frames
 
Audio stream:      nan kbit/s  (-2147483648 bps)  size: 0 bytes  0.000 secs
  MJP: returning!

I tried lavc with acodec=mp2, mp3, ac3, and adpcm_ima_wav. Mencoder 
wouldn't work except with adpcm_ima_wav, which produced noisy sound 
(probably a fix for that but not tonight).
Using the pcm codec does seem to work, resulting in probably much larger 
files.
Thus my final command looks like this:
mencoder -tv 
driver=v4l:width=640:height=480:norm=NTSC:chanlist=us-cable:channel=8 
tv:// -ovc lavc -lavcopts vcodec=mpeg4:v4mv -vop pp=lb -oac pcm -endpos 
5 -o vcr-test.avi

This works for now. I hope all those incredibly smart people who've been 
in this mailing-list more than a day :) and know what the problem is, 
can tell us what we're doing wrong so that we can use MP3 audio enocding 
again.
Hint, hint, nudge, nudge...   ;)

I hope this overly-verbose reply helps you.



utzkul wrote:

> hy,
> after i updated my mplayer to  MPlayer 1.0pre4-3.3.3
> i have no sound while watching tv.
>
> befor the update i started mplayer with:
> #mplayer -tv on:driver=bsdbt848:device=/dev/bktr0:audioid=2:input=1
>
> after the update i switched the syntax to:
> #mplayer -tv driver=bsdbt848:device=/dev/bktr0:audioid=2:input=1 tv://
>
> i nothing changed in the mixer options!
> what goes wrong?
>
> thanks for help
>
>
> PLEASE HELP! I NEED SOUND! :(
>
> _______________________________________________
> MPlayer-users mailing list
> MPlayer-users at mplayerhq.hu
> http://mplayerhq.hu/mailman/listinfo/mplayer-users
>