Can Xvid look like Corona files?

[trbarry]

In this thread (http://forum.doom9.org/showthread.php?s=&postid=142351#post142351) they are talking about Microsoft's new Corona/mpeg4 codec. It seems likely to me that M$ will talk the video card vendors into supporting Corona playback with hardware accelerated DXVA.

But Xvid can already be a chameleon and use Divx Fourcc codes, looking like Divx.

How hard would it be to make Xvid file output look like Corona so I could get full screen full speed 1920x1080 HDTV playback, using the Microsoft dshow display filters and video hardware acceleration?

Anybody know anything about this?

- Tom

[Koepi]

We'd just need to know the

- FourCC. Not too hard to find out.
- the corona mp4 file format. Some educated guesses and plenty of research has to be done here.

After that it should be possible, but you'd need a converter most likely...

Regards,
Koepi

[trbarry]

XVid will be needing revised to allow for greater then 10k bits, and greater then 720x576 resolutions

I don't think Xvid currently has those limitations now. I'm not sure about 10k bits but I'm sure I've encode greater resolutions than 720x576 with xvid.

But everyone seems to agree it is just too early to even speculate about it. Still something to keep an eye on though.

- Tom

[chemmajik]

Oops trbarry you responded before I deleted it. I just saw the mpeg4 has revised quiet a bit since I read the standards. I came across a much newer spec. Seems they finally updated alot of old info floating around on the mpeg4 web...(about time) Support for up to 4000 by 2000 pixels with up to about 1.2 Gbps bitrates.

[trbarry]

Sadly however I've heard that Sigma card still has the 720x576 limitation. But I guess Xvid, Divx, and Corona are not limited that way.

- Tom

[Richard Berg]

To be clear, the Sigma card's limitation is with the source video, not the scaled output (which supports 1080i & 720p). Not that I'll be buying one or anything.