Re: [transcode-users] converting Xvid to Divx

[Christoph Lampert <chl@xxxxxxxxxxxxxxxx>]

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=Search&;

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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