[MPlayer-users] MEncoder Sound Really Messed Up

andrew at WARnux.com andrew at WARnux.com
Sun Jun 12 05:07:45 CEST 2011

On 06/11/2011 08:32 PM, Reimar Döffinger wrote:
> On Sun, Jun 12, 2011 at 09:47:04AM +1200, Lobster wrote:
>> On 12/06/2011 8:07 a.m., andrew at WARnux.com wrote:
>>> I am using MEncoder r33579 (committed today) which is being called
>>> into by DeVeDe to create a DVD formatted file for burning.  The
>>> sound is really really messed up; it plays slow and skips every so
>>> often.  The video is fine, but the sound is like it's in slow
>>> motion.  Note that it didn't matter what video file I used, the
>>> result was the same.  Here is the full command line that DeVeDe
>>> used:
>>> /usr/bin/mencoder    -srate    48000    -af    lavcresample=48000
>>> -oac    lavc    -aid    1    -ovc    lavc    -of    mpeg
>>> -mpegopts    format=dvd:tsaf    -ofps    30000/1001    -vf
>>> scale=352:240,harddup    -lavcopts    threads=2:vcodec=mpeg2video:trell:mbd=2:sc_threshold=1000000000:cgop:vstrict=0:vrc_maxrate=1600:vrc_buf_size=1835:vbitrate=800:keyint=12:acodec=ac3:abitrate=224:aspect=4/3
>>> -o    movie_01_01.mpg    test.avi
>> Change acodec=ac3 to acodec=ac3_fixed
> > From SVN r33592 such hacks should no longer be necessary.
> mencoder will from then on also use the more sensible behaviour
> of mplayer, i.e. if the output of decoder+filter chain is
> s16 it will try to encode as s16, if it is float it will try
> to encode as float etc.
> Which means that you can also chose between the fixed-point
> and floating-point AC-3 encoder via -af format=s16ne and
> -af format=floatne.
> If the format is not supported, it will fallback to s16.
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Confirmed; it's fixed as of r33592.


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