Hi,
I'm having the same problem but I also don't get audio in the preview.
I'm running DeVeDe 3.16.9, Mplayer 33265-4.5.2 and x264 0.0.20110223.
I ran devede-debug and I think I've hit what the problem is (at least
for my system).
The problem appears to be that DeVeDe is using the wrong audio codec.
According to the output of mplayer the ac3 codec is using an
"unsupported" input method. There is an "ac3_fixed" codec. I've tested
the mencoder command changing the codec to ac3_fixed and audio does
work for the preview file.
Here is the relevant section of devede.debug when I try to launch a
preview on a Matroska file:
Launching program: mencoder -srate 48000 -speed 25025:24000 -af
lavcresample=48000 -noautosub -oac lavc -aid 1 -ovc lavc -of mpeg -
mpegopts format=dvd:tsaf -endpos 60.0 -ofps 25 -vf
scale=720:576,harddup -lavcopts
threads=2:vcodec=mpeg2video:trell:mbd=2:sc_threshold=1000000000:cgop:vstrict=0:vrc_maxrate=8500:vrc_buf_size=1835:vbitrate=5001:keyint=12:acodec=ac3:abitrate=224:aspect=16/9
-o /var/tmp/previewfile_01_01.mpg /usr/home/martin/testfile.mkv
elemento: /usr/bin
[matroska,webm @ 0x13c1f30] max_analyze_duration reached
[matroska,webm @ 0x13c1f30] Estimating duration from bitrate, this may
be inaccurate
Encoder requires input not properly supported.Try using e.g.
'ac3_fixed' instead of 'ac3' as codec