[XviD-devel] Idea for encoding iframes (or images for that matter)

[Christoph Lampert]

On Sun, 8 Aug 2004, Jan Lucas wrote:
> BTW: What do you people think about adding extensions to XVID that
> aren't in MPEG-4?

I vote strongly against it. There is already too much confusion about 
MPEG-4 / XviD / DivX etc. So far, we can claim that XviD is MPEG-4 
compatible, and if combinations don't work, it's the other people's fault, 
usually the hardware manufacturers, or DivXnetworks'. 

But if XviD started creating their own features as well, no matter if 
helpful or not, soon people would start using them (as they did for 
GMC, which never was very useful, but at least compatible to 
MPEG-4), and then the label "XviD" wouldn't mean any interoperability 
anymore. 

One reason behind XviD is to have a competetive interoperable codec, 
because Microsoft surely isn't going to provide us with such, and 
DivXnetwork isn't very good at keeping standards either. 

gruel

P.S. Of course, since XviD is under GPL, you can fork and add features as 
you like, but I would strong suggest to not call the result "XviD". And 
e.g. AVC's 4x4 integer transform has just as many disadvantages as 
advantages. I guess it was mainly adopted to get around some patent stuff, 
and get rid off the DCT decoding drift (because decoding that transform is 
bit-exact).