[MPlayer-users] Bug report (mencoder sig-faults)

[Corey Hickey]

Mark Williams (MWP) wrote:
> Hi yall ;)
> 
> Ive just tried encoding a movie using todays CVS (31/01/04) of mplayer and ffmpeg (for libavcodec).
> First pass completes, but looks shocking (very boxy).

Are you cropping and scaling appropriately? From your "VOP=" below, I'm
guessing not. Read DOCS/tech/encoding-tips.txt. The basic gist is that
you need to crop out any black bars, _entirely_, and then scale the
image so both axes are multiples of 16.

> On trying to start the second pass, mencoder dies with a sig-fault.
> 
> Im using:
> 
> LAVC="vcodec=mpeg4:mbd=2:trell:mv0:cbp:naq:v4mv:vme=4:vrc_eq=tex:vmax_b_frames=1:vb_strategy=0:vstrict=-1:preme=2:dia=2:predia=2:vqcomp=0.8:lumi_mask=0.05:dark_mask=0.01"
> VOP="hqdn3d,pp=dr/h1/v1"
> 

Are you using the same lavc parameters for both passes? If so, try using
dd to extract the last 1MB or so from the video (use mplayer -dumpstream
first if you're encoding a DVD). Try encoding that 1MB chunk and see if
you get the same results. If so, read:
http://www.mplayerhq.hu/DOCS/HTML/en/bugreports.html
and submit a complete bugreport, including the upload of the 1MB chunk
to the mplayerhq ftp server.

-Corey