[MPlayer-users] AC3 to MP3

[Corey Hickey]

Hans du Plooy wrote:
> On Tue, 2006-12-19 at 13:20 -0800, Corey Hickey wrote:
>> giorgio65it wrote:
>> This should be significantly faster:
>> $ mplayer dvd://1 -vc null -vo null -aid 129 \
>>    -ao pcm:fast:file=filename.wav
> 
> Just a question out of interest.  This works well - faster than real
> time, and the resulting file seems fine (so far).
> 
> Why then do MPlayer still bring up the usual "Your system is too SLOW to
> play this!" banner?

I don't completely understand the particulars, but, basically, the 
"fast" option for ao_pcm throws off mplayer's A-V sync. If you watch the 
A-V indicator on the status line, you'll see it jumping around a lot.

Most of the time, when video lags far behind the audio, that's a 
problem, so mplayer spits out a warning. In this case, though, since 
you're not doing anything with the video, sync doesn't matter and the 
warning is harmless.

You can take Guillaume's suggestion and use '-vc dummy' instead of '-vc 
null'. I hadn't realized that was still useful these days, and it 
actually seems a little bit faster. I don't have time to seriously 
benchmark it right now.

-Corey