Dan P <dan### [at] yahoocom> wrote:
> The IRTC accepts MPEG-1 files. For more information, see:
> http://www.irtc.org/anims/rules.html#anims

  The principle in the IRTC of accepting only MPEG-1 was made when
MPEG-1 was in practice the only video format supported by almost all
(multimedia-capable) computers out there and when newer MPEG formats
were rarely supported.

  This was many years ago. While I think it's still a very good idea
for the IRTC to stick to the MPEG-1 requirement, in other contexts
(such as povray.binaries.animations) I think that it has more and more
become ok to use a more modern MPEG version or variant (such as DivX).
Most systems nowadays support these newer codecs (Windows, Linux, MacOS,
even Solaris) and their advantage is that they can produce considerably
smaller files.
  The smaller you can get the file without losing too much quality,
the better.

  I would not recommend, however, using closed, proprietary formats
such as MS VMW, RealMedia or QuickTime MOV. People in different
system may have more difficulty in viewing those than plain MPEG-2
or MPEG-4 videos.
  Although DivX is more or less closed and properitary, I think it's
still better then those. VidX seems to be completely open and it has
a good quality.

  Of course if you want to go the easy and sure way, just use MPEG-1.
There's howevem choice about which program to use to create the video.
Not all programs create identical MPEG-1 videos, but some programs can
optimize it much better than others.
  Generally TMPEG is said to be an excellent cheap program for creating
good-quality MPEG-1 and MPEG-2 videos.

-- 
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