[MEncoder-users] DVD compliant MPEG2 encoding

[Lauri Myllari]

On Fri, Sep 09, 2005 at 11:31:33AM +0200, Michael Niedermayer wrote:
> On Thu, Sep 08, 2005 at 11:01:27PM -0400, Rich Felker wrote:
> > On Fri, Sep 09, 2005 at 01:14:18AM +0300, Lauri Myllari wrote:
> > > 1) me_range
> > > 
> > > The player I use for testing is a Pioneer DV-545 and it's
> > > apparently quite strict about standard compliance. After adding
> > > "me_range=127" to lavcopts the player stopped skipping/crashing on
> > > scenes with fast motion.
> 
> use cvs!!!

% mencoder -v
MEncoder dev-CVS-050905-13:39-3.4.5 (C) 2000-2005 MPlayer Team

(Now updated to dev-CVS-050910-12:13-3.4.5 and got the same result)

[snip]
> > > Should this be noted in the encoding-guide.txt section about DVD
> > > constraints?
> > 
> > Yes.
> 
> probably not but it wont hurt OTOH, this is a limit of MPEG-2 not dvd,
> and lavc will take care of it by default

Without me_range=128 I get a bad stream.

I think this happens with all encodes, but here's one way to reproduce:

% mencoder kingdom_of_heaven_m720p.mov -o video_mer128.m2v -noskip -ofps 24000/1001 \ 
        -ovc lavc -of rawvideo -ffourcc MPG2 -vf expand=1280:720,scale=720:480 \
        -lavcopts vcodec=mpeg2video:keyint=15:vbitrate=1800:vrc_buf_size=1835:vrc_maxrate=9000:aspect=16/9:me_range=128

% mencoder kingdom_of_heaven_m720p.mov -o video.m2v -noskip -ofps 24000/1001 \    
        -ovc lavc -of rawvideo -ffourcc MPG2 -vf expand=1280:720,scale=720:480 \
        -lavcopts vcodec=mpeg2video:keyint=15:vbitrate=1800:vrc_buf_size=1835:vrc_maxrate=9000:aspect=16/9
                      

Source is http://images.apple.com/movies/us/hd_gallery/gl1800/kingdom_of_heaven_m720p.mov

First output (video_mer128.m2v) works, second one (video.m2v) has
problems (skips, then hangs) on Pioneer DV-545.

--rez