> In many countries, the MPEG-LA could sue you (and win) for using *or distributing* ffmpeg's H.264 decoder. Is that the kind of regime you want to live under?
The MPEG LA has never sued an end-user to date. While in theory they could do that in the future, it's about as likely as getting killed by a meteor hit. Microsoft could also sue you for using Linux. You never know, they do have patents that cover it.
If you are afraid of distributing an H.264 decoder, fine, leave it to others and use what is available on the system.
> > As far as other platforms XP does not support H.264 out of the box, but Vista and Windows 7 does.
> Vista doesn't.
Who uses Vista? ;-p
Seriously, how big a slice of your userbase uses Vista? For the FFmpeg and MPlayer websites I see less than 20% of the Windows users on Vista, most are still on XP and likely to skip Vista on their upgrade path.
So what are the statistics? How many of your users do not have access to a system H.264 decoder and how many will not in five years time?