[MEncoder-users] MPEG encoding hangs

[Stefan Sassenberg]

Moritz Barsnick schrieb:
> Hi,
> 
> On Fri, Jan 02, 2009 at 12:36:11 +0100, belcampo wrote:
>> I don't know what you're trying to achieve, but your source is an mp4 
>> container and the dvd-format is an MPEG2 format container.
> 
> I think his command line should be capable of doing exactly that
> conversion.
> 
>> Further DVD codec format is MPEG2 which your mp4 won't be.  So a ovc
>> copy cannot work.
> 
> It _can_ be MPEG2 video within an MPEG4 container (Google claims it
> exists ;->). But indeed:
> 
>>> VIDEO:  [avc1]  1280x720  24bpp  29.970 fps    0.0 kbps ( 0.0 kbyte/s)
>>> [V] filefmt:44  fourcc:0x31637661  size:1280x720  fps:29.970  ftime:=0.0334
> 
> That's AVC-1 video a.k.a. H.264. So indeed, Stefan (the original
> poster) is not going to achieve what he said he was trying to.

The final command line looks like this:
mencoder 03-trail_betti.mp4 -vf scale=720:576,expand=720:576,harddup 
-srate 48000 -af lavcresample=48000 -ovc lavc -lavcopts 
vcodec=mpeg2video:vrc_buf_size=1835:vrc_maxrate=9800:vbitrate=5000:keyint=18:acodec=ac3:abitrate=192:aspect=16/9 
-ofps 25 -oac lavc -of mpeg -mpegopts format=dvd -o 
~/movies/new/03-trail_betti.mpg -frames 7250

So it contains scaling, cutting and - first of all - reencoding. I 
usually start with simple command lines when testing things. Please 
ignore the expand parameter as mencoder probably does too.

What matters me is that I still have to reencode the audio track because 
of the endless loop. Is there any developer out here who is interested? 
Should I subscribe to some bug tracking system to report the bug? Is 
there a quick hack? I added 255: as case label to the file but it ends 
with lots of messages like

Skipping frame!
AINIT: 0.200    20f ( 0%)  0.00fps Trem:   2min   0mb  A-V:0.063 [0:65]

Stefan