Re: [transcode-users] converting Xvid to Divx

[Christoph Lampert <chl@xxxxxxxxxxxxxxxx>]

On Mon, 26 Jul 2004, Paul Litwack wrote:

> On Monday 26 July 2004 07:59 pm, Steffen Scheuring wrote:
> I have a Phillips DVP642. I can only get it to play with transcoded xvid 
> files 
> that use the older 0.9.2 version. Current xvid codec doesn't work. 

Strange, I though had written this earlier: Current XviD supports some 
features which DivX-hardware devices don't support. That's not a bug, 
that's a feature. 

If you disable those features in encoding (and possibly change fourcc 
code to DX50), then the file will play. 
In short: set max_bframes=1, qpel=0, gmc=0

And please everybody read the documentation e.g. at doom9.net and google 
before asking again and again the same stuff. 

chl




> >
> > there are a lot Xvid encoded files which can not be played, not even
> > one which is Xvid encoded, so I think it is a general problem.
> >
> > I read the report at videohelp.com, but at mine Xvid is not working,
> > even some Divx5 encoded stuff doesn't work ...
> >
> > A Xvid encoded file will not be recognized by the player and will not
> > be shown at the disc menu. So it could be the first problem you
> > described. I will test it tomorrow.
> >
> > Does the bitrate influence the quality? At last solution I will
> > reencode it but this seem to downgrade the quality.
> >
> > Steffen
> >
> > Am Montag, 26. Juli 2004 21:03 schrieb Christoph Lampert:
> > > Hi,
> > >
> > > first of all, there _is_ no XviD format or DivX format.
> > > Both is a subset of MPEG-4, usually in AVI container. Only which
> >
> > features
> >
> > > can be activated for encoding differs between them, because XviD
> >
> > supports
> >
> > > all of "Advanced Simple Profile" whereas DivX (and certified
> >
> > hardware
> >
> > > devices) don't support some parts of that.
> > >
> > > There are 3 possiblities:
> > > 1) The file is encoded in a way that DivX supports, but the AVI
> >
> > header
> >
> > > specifies it to be XVID. Then changing the header should be enough,
> > > usually the avifix tricks should do, although I would change to
> > > DX50 instead of DIV5.
> > >
> > > 2) The file uses MPEG-4 features which DivX does'nt support. Then
> >
> > you have
> >
> > > to reencode. audio can be passed-through, video cannot. As already
> > > mentioned, you should check the bitrate and encode again a similar
> >
> > value,
> >
> > > or your file will end up too large or too small.
> > >
> > > 3) The file's features are okay, but the bitrate is too high for
> >
> > your
> >
> > > player. That you can see if after changing the FOURCC; the file
> >
> > starts
> >
> > > playing, but has jumps or stops in the video during play. This can
> >
> > only be
> >
> > > solve be reencoding, but with a _lower_ bitrate. However, max
> >
> > bitrate is
> >
> > > rather high, so this case shouldn't happen often.
> > >
> > > Christoph
> > >
> > > P.S. apart from that, reports on the player show that "normal" XviD
> > > shouldnt be a problem:
> >
> > http://www.videohelp.com/dvdplayers/dvdplayers.php?DVDnameid=4182&Search=Se
> >arch&
> >
> > > On Mon, 26 Jul 2004, Steffen Scheuring wrote:
> > > > Unfortunately I bought a DVD player (Philips DVP 630) which is
> >
> > abled
> >
> > > > to play Divx encoded files but not Xvid encoded. :-(
> > > >
> > > > So if Philps can't help me to make the player able to play Xvid I
> >
> > have
> >
> > > > to convert my Xvid files into Divx.
> > > >
> > > > I gave something a try and I was able to transcode but the quality
> > > > decreased.
> > > >
> > > > File I tried to was this format (command file):
> > > > RIFF (little-endian) data, AVI, 560 x 416, 23.98 fps, video: XviD,
> > > > audio: MPEG-1 Layer 3 (stereo, 44100 Hz)
> > > >
> > > > I converted it using these call:
> > > > transcode -a 0 -x xvid -i input.avi -b 128,0,2 --a52_drc_off -V -I
> >
> > 1
> >
> > > > -y divx5 -o output.avi
> > > >
> > > > The output was this:
> > > > RIFF (little-endian) data, AVI, 560 x 416, 23.98 fps, video: DivX
> >
> > 5,
> >
> > > > audio: MPEG-1 Layer 3 (stereo, 44100 Hz)
> > > >
> > > > But the quality of the output was much lower than the input.
> > > >
> > > > Can someone help me. What is the best way to convert from Xvid to
> > > > Divx? I want to have the best quality result possible.
> > > >
> > > > Does someone know something about the Xvid problems of my
> >
> > DVD-Player?
> >
> > > > Thanx in advance.
> > > > Steffen
> > > >
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