Theora vs. M-JPEG2000

Hello,

Talking about video codecs, specifically Theora (www.theora.org) and
M-JPEG2000, how do they compare in terms of compression ratio for a given
quality?

Being M-JPEG2000 based on still pictures and not taking advantage of
interframe redundancies (from the very few I have read so far), is it
viable for networking and storage applications?

Kindest regards,

JaaC

-- 
Posted via a free Usenet account from http://www.teranews.com

On 18 Feb, 23:18, Jaime Andres Aranguren Cardona <j...@nospam-
sanjaac.com> wrote:
> Hello,
>
> Talking about video codecs, specifically Theora (www.theora.org) and
> M-JPEG2000, how do they compare in terms of compression ratio for a given
> quality?

Well, I've seen discussions that suggest JPEG2000 can compare
favourably with MPEG-4, and also others that suggest there's not a lot
to choose between Theora and MPEG-4.  The discussions are usually
talking about quality for specified ratio, but that typically works
out similar.

> Being M-JPEG2000 based on still pictures and not taking advantage of
> interframe redundancies (from the very few I have read so far), is it
> viable for networking and storage applications?

Given that MJPEG was clearly viable, I see no reason why not.  It's
also possible to trivially create a variant that takes some advantage
of interframe redundancies by encoding an image that's subtracted from
the previous frame (as it appears after running back through the
decoder, not the original frame).  I did that with JPEG once and the
results were reasonably good.