Displaying 20 results from an estimated 9000 matches similar to: "Current state of theora & Windows port?"
2002 Nov 11
2
Quality of vp3.2 codec?
How good is the video compression in vp3.2?
For example, how does it compare (bit rate & quality) to mpeg1, mpeg2,
Divx, real Video 8+, Windows Media, etc. etc.
It being open source is nice and all, but if it can't be reasonably
competitive then there isn't much point to it.
I just haven't seen anything that compares vp32 to anything else.
(Although to be honest, I haven't
2004 Jul 11
17
Independent implementations?
Hullo,
When people ask me what Vorbis's license terms are, I usually tell
them that the bitstream format is in the public domain, that the
reference libraries are licensed under a BSD-like license, and that
the example programs are licensed under the GNU GPL. (Note the
distinction between filespec and implementation here.)
Meanwhile, Theora.org's FAQ doesn't say anything about the
2009 Jul 04
2
Some questions about Theora IP
Hello Theora developers,
I'm doing some cursory research into Theora's IP status in preparation
for asking Apple to reconsider the possibility of shipping an
implementation. I have a few questions and I'm hoping knowledgeable
people can help out.
1) What are the terms of any patent licenses or disclaimers, and do
they have field of use restrictions or limitations on code for
2003 Jan 27
5
It's quiet. TOO quiet.
Whatever became of Ogg Theora?
There seems to be still almost no news from Xiph or its
developers regarding Ogg Theora. None at all since Mid-December,
when the release of Alpha 2 was pushed back to a month ago...
No news on plans for the second Alpha? No news of development
"roadmaps"? No news on current developments or challenges that
are stalling development? No CVS updates
2005 Mar 22
3
troll or truth ?
Hello,
I was discussing on the mplayer/mencoder ML about transcodingfrom Divx
to Theora. I got these kind of answers:
http://article.gmane.org/gmane.comp.video.mencoder.user/280
Of course I understoud only 50% of what he said, as well as I am not
really used with codec and video glossary...
But I generally understoud his opinion. What to think? I would like not
to believe him, espacially when
2004 May 14
3
New experimental theora implementation
Derf's from-scratch alternate implementation of the theora codec is now
publicly available from our subversion repository.
http://svn.xiph.org/experimental/derf/theora-exp/
This exciting new codebase promises superiour performance, and the encoder
is capable of higher quality output than the current represenation, taking
advantage of the bitstream extension we've added to the
2007 Sep 10
6
Marketing stuff
Hello,
I took the liberty of quickly slamming together
http://www.theora.org/benefits/ . This is supposed to answer the "why
should you use Theora" question in some detail.
This section is not yet included in the navigation bar and I'd like to
get confirmation that this information can be considered "canon" before
making it "visible" (oh, and of course someone
2002 Aug 03
7
theora MMX decoder
I try to merge VP3's mmx decoder into theora.
http://kyoto.cool.ne.jp/vp3/developers/theora-alpha3-MMXd-src.zip
You can see the change by searching the keyword "_UsingMMX_" in all lib
folder's file.
From
VP3???YO
vp3@go8.enjoy.ne.jp
2003 Jul 23
2
Question about converting VP3 to Ogg Theora
As I understand it the current plan is to make it possible to
losslessly transcode VP3 video to Theora video.
In my experience, one of the "features" of VP3 is it drops frames in
the event that there is little/no movement in a frame, or if "drop
frames" is enabled, to drop frames if the data rate is getting too
high. I understand that the way that VP3 does this in
2002 Sep 01
2
Seperating Forground from Background
One thing I have noticed when encoding VCDs is that often videos with
complex backgrounds don't compress nearly as well as those with simple
ones. Part of the problem is that TV cameras seam to have the focus so
that the entire image is clear rather than focusing on the foreground (and
blurring the backgrounds). The result is that a good number of bits are
wasted trying to perfectly
2002 Sep 04
4
Limiting bandwidth to around max. 8k per second - possible? UPDATE
Ok, we got it working with 176x144 resolution.
The following string produced an image that was not falling behind too
much for too long - basically a little when it was getting TONS of
movement, and then catching up fast.
"65 58 110 0 1 1 90 8 120 1 1 "
Now, we need to get this working on a 320x240 resolution, too (as sadly
VP3 does not support 160x120. Seems to be a little senseless,
2003 Feb 13
5
Ogg MIME types scheme
Hello everybody,
I hope to finish this MIME types discussion with these conclusions -
it's taken enough bandwidth on these lists :). So here's a generic MIME
types scheme that we all seem to be able to agree on and all that is
needed for the moment.
---
1) Ogg encapsulated files:
Any data that is encapsulated in an Ogg container will us the MIME type:
application/ogg
(as already
2003 Feb 13
5
Ogg MIME types scheme
Hello everybody,
I hope to finish this MIME types discussion with these conclusions -
it's taken enough bandwidth on these lists :). So here's a generic MIME
types scheme that we all seem to be able to agree on and all that is
needed for the moment.
---
1) Ogg encapsulated files:
Any data that is encapsulated in an Ogg container will us the MIME type:
application/ogg
(as already
2003 Feb 13
5
Ogg MIME types scheme
Hello everybody,
I hope to finish this MIME types discussion with these conclusions -
it's taken enough bandwidth on these lists :). So here's a generic MIME
types scheme that we all seem to be able to agree on and all that is
needed for the moment.
---
1) Ogg encapsulated files:
Any data that is encapsulated in an Ogg container will us the MIME type:
application/ogg
(as already
2002 Oct 11
5
Changing video quality during encoding
I don't know how to change a video quality on the fly - I want to provide a slider with a preview window, so user could see the result immediately in this window. I tried to send ICM_COMPRESS_FRAMES_INFO to encoder or calling ICSetState() - with no success however. Am I doing something wrong ? How can I set 'lDataRate', 'dwRate', 'dwScale' parameters ? I tried every
2005 Apr 11
2
Theora, MMX and optimisation
Hi everyone,
I just landed into the theora planet, as a game programmer, I searched
for a free video fomat/codec and the theora choice became obvious.
However I experienced rather bad performance (at least from a game
programming point of view)
After a couple a profiling, I discovered, as previous discused in a
post found via Google, that the bottleneck is in the ogg library. An
unsane part of the
2002 Oct 04
5
Theora support in ffdshow a ffvfw
Hi,
I'm developing ffdshow and ffvfw codecs for Windows. You can read more
about them at http://cutka.szm.sk and http://sourceforge.net/projects/ffdshow.
Stéphane Bérubé asked me recently if I could implement Theora support. I knew
about first Theora release, downloaded its sources and tested it. I liked
the results add decided to support it.
I implemented encoding functionality into ffvfw,
2002 Aug 28
5
Analogue artifact estimation
Hi List,
Just batting a few ideas around here, but would it be possible to include in to the codec, estimation for common video artifacts that occur in the analogue world?
For example, anything that's gone through a composite stage will likely have dot-crawl and false colour - if we can recognise this effect in the encoder, we can treat it as a special case.
Other artifacts that come to
2002 Jul 18
3
Boring but useful VP3/QT patches
I think I'll start with the simple stuff, just to be safe. :-)
Here are some cvsignore updates, and a fix for the inter-project dependencies in the MSVC *.dsw file.
Cheers,
Eric
-------------- next part --------------
A non-text attachment was scrubbed...
Name: vp32-cvs-ignore-patch.diff
Type: application/octet-stream
Size: 1524 bytes
Desc: vp32-cvs-ignore-patch.diff
Url :
2003 Mar 09
4
Proof of Concept
Hi,
So it took a little while to get here but VP3 through ffmpeg is
finally starting to achieve viewable results. It partially works right
now. Keyframes only. And monochrome. Oh, and the picture is upside down
(something I did not realize about VP3 until I let it fly just now).
Anyway, here is a picture of ffmpeg's VP3 decoder in action using xine: