[MEncoder-users] Problems with mencoder on Win32 and MKV

[Joey Parrish]

On 4/23/07, Berend Dekens <cyberwizzard at sportlaan.adsl.utwente.nl> wrote:
> I'm using Transcode360 for my Xbox360 to view video on my TV. Some stuff
> is encoded in Matroska (most of which is x264) and I can't get this
> content to work. It either runs heavely out of sync (seconds out of sync
> after seconds of video) and it looks like the video is playing too fast.
> With some files it runs fine for a while and then cuts out with messages
> about having too many packets in the audio buffer.
>
> An example of how the mencoder is executed under windows MCE:
> mencoder.exe -quiet -delay 0 -oac lavc -srate 48000 -af
> lavcresample=48000 -of mpeg -mpegopts format=dvd -o "C:\Program
> Files\Transcode360\Buffer\Pumpkin Scissors - 03 (1024x576 h264).360"
> -ovc lavc -vf scale=720:404,expand=784:432,harddup -lavcopts
> vcodec=mpeg2video:vrc_buf_size=1835:vrc_maxrate=9800:vbitrate=8000:keyint=15:aspect=16/9:acodec=mp2:abitrate=320
> -ofps 24000/1001 -slang eng -subpos 92 -alang jp -alang jpn "Pumpkin
> Scissors - 03 (1024x576 h264).mkv"
>
> I tried playing with the options and I can't get it to work. I replaced
> the stock mencoder.exe with numerous newer builds, some of which seemed
> to improve the situation a little, other only made it worse.
> What is going wrong? The strange thing is that everyone seems to use MKV
> without problems... So why do I run into a brick wall time after time
> (this has been broken for over a year now).

Try another audio codec (not -oac lavc).  There are bugs there that
have yet to be tracked down and fixed.  For me, anything I produce
with -oac lavc is broken in that exact way.  Alternately, you can play
the broken file back correctly with mplayer -nobps or mplayer -demuxer
lavf, I think.

--Joey