Displaying 20 results from an estimated 4000 matches similar to: "VP3/QT: More QT 6 trouble"
2002 Jul 20
1
VP3/QT: 3.2.6.1 is OK w/QT6
--- Daniel B. Miller wrote:
Please, anyone who is working with VP3 codecs, get the new build as soon
as possible. It's available through the normal cvs server at xiph. see:
http://www.theora.org/cvs.html
take the latest build, 3.2.6.1
--- end of quote ---
I've run down through all of our QuickTime 6 bugs, and the VP3 source code in CVS appears to have a clean bill of health. If
2002 Jul 18
1
VP3/QT: Fix for QuickTime 6 GDI bug
QuickTime 6 for Windows breaks the VP3 codec quite severely--if you turn on "Safe Mode" (which forces QuickTime to draw through GDI), you'll see a white or black screen instead of video. This is logged as bug #2111990 in Apple's QuickTime feedback system. The fix is a classic one-liner, although it took me a long time to figure it out. :-/
Also attached is a patch to bump the
2002 Jul 23
1
VP3/QT: A new kdxlqt_CodecVersion patch
The new 3.2.6.1 codecs work great with QuickTime 6 (thank you!), but there's no way for an application to identify them. And since the older 3.2.1.x and 3.2.2.x installers will actually *downgrade* the installed version of VP3, it would be nice if an application could warn the user.
The attached patch increments kdxlqt_CodecVersion (and documents all the Component Manager arcana involved).
2002 Oct 18
3
Quicktime Vs Windows encoding with VP3
I found out about vp3 from the new winamp and coincidentally i also happen to be trying to find a suitable solution to broadband streaming.
I have used flaskmpeg to create a 17mb .avi file from an 82mb Mpeg 1 file and it looks great it took about twenty minutes to encode. It runs for eight minutes and the audio is also fantastic using the lame encoder.
However when I try to do the same in
2002 Sep 10
1
VP3 Compressor Settings
Hi Guys,
I was wondering what the idea behind the "Key Frame" settings are in the VP3
codec settings. As far as I could ascertain (from browsing through the
source code) the VP3 codec ignores the lpbiPrev and lpPrev members of the
ICCOMPRESS structure.
My conclusion is thus that each frame passed to the codec is compressed
individually and that the redundant information based upon
2002 Jul 19
1
Using 'patch' (was Re: Boring but useful VP3/QT patches)
--- "Daniel B. Miller" wrote:
It looks to me like patch is trying to put each .cvsignore in the vp32
directory rather than the specified subdirectories such as
Codecs/quicktime/.
It seems like I need some option to get patch to use the 'Index:'
commands. I looked at the man page, it goes on about how patch tries to
derive the filenames, but I am still confused. Any help would
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
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2003 Mar 23
6
A comparison of VP3, and two MPEG-4 variants
a couple points before I look at this too hard:
"For VP3, since you can't do a constant quality encode"
what? that should not be the case. Could be a QT-specific bug. Theora at any rate is certainly capable of doing constant-quality encode. This probably explains your standard deviation complaint -- VP3 is running a rate control alg, where the other codecs are just shooting for
2002 Aug 20
5
Using the VP3 ENCODER in a DIRECTSHOW GRAPH wit defined quality and BANDWIDTH - HOW?
Hello,
Due to some licensing changes (and because I actually want to promote
this, too) I want to replace our usage of Intel Indeo 5 with VP3 in a
video conferencing pplication we are just developing (check:
http://www.stnadby24.no/ for infos (english language) on the
application).
My problem is this: I need to define at least the bandwidth. I am
feeding full frames from the camera with a given
2002 Aug 06
1
VP3 Patch For xine
Hi,
Since a number of people are eager to try out the native VP3
decoder in xine, I have made a patch available, bz2-compressed:
http://www.pcisys.net/~melanson/codecs/xine-vp3-decoder-patch.bz2
To work with this patch:
1) Get the latest xine-lib from CVS. Visit this page for more details:
http://sourceforge.net/cvs/?group_id=9655
The module name is xine-lib, but you will also need
2010 Mar 04
2
libavcodec vp3 / theora decoder speedup
The vp3 / theora decoder in FFmpeg project received a major speedup:
http://multimedia.cx/eggs/profiling-and-optimizing-theora/#comment-150751
http://git.ffmpeg.org/?p=ffmpeg;a=commit;h=6e8061980c9a18a0eb9802f5dc5becc349066680
http://git.ffmpeg.org/?p=ffmpeg;a=commit;h=8476744ba50d26a3e188def192cd9086b0f781d7
http://git.ffmpeg.org/?p=ffmpeg;a=commit;h=a51faef9b61bd80499a28322802ef4b22be44d43
2007 Jan 16
2
On2 VP3 codec for Intel macs
Hi all,
It's been a few years since I encoded a number of movies using the
VP3 codec (v3.2) on my Quicksilver PPC. Now I have a new Intel mac and I'd
like to play them. However, it seems that the codec offered on On2's
website is only for the PPC architecture. Does anyone know a workaround or
some other codec that works on the MacIntel platform? I'm using Quicktime
Pro 7.
2006 Oct 20
1
VP3 question
I get exceptionally bad image quality when I try to encode an
(uncompressed) AVI into a VP3 AVI
(actually I get this output no matter what format the source).
Please see this for a brief description of the problem:
http://InspiredCode.com/VP3problem.htm
What is wrong and what do I need to do?
Thanks!
Robison
2006 Oct 20
1
VP3 question
I get exceptionally bad image quality when I try to encode an
(uncompressed) AVI into a VP3 AVI
(actually I get this output no matter what format the source).
Please see this for a brief description of the problem:
http://InspiredCode.com/VP3problem.htm
What is wrong and what do I need to do?
Thanks!
Robison
2003 Oct 09
4
Updated VP3 Document
Hi,
I have been on a documentation kick recently. I finally updated my
VP3 format document tonight:
http://www.pcisys.net/~melanson/codecs/vp3-format.txt
v0.2: October 9, 2003
- expanded section "Reversing the DC Prediction"
- added Appendix B: Theora Differences
Feel free to look it over and point out any glaring mistakes. I can't wait
to see how much sense it makes to
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
2003 Jan 13
1
Multiple Feed Vp3
Oliver --
Your question was asked & answered on the theora@xiph.org list -- see my post:
<p>-----Original Message-----
From: Oliver Darvall [mailto:oliver@cura.co.za]
Sent: Monday, January 13, 2003 2:38 AM
To: theora-dev@xiph.org
Subject: [theora-dev] Multiple Feed Vp3
<p>Hi,
I have been using Vp3 for some time now to compress the video from a single
video source. However, I
2005 Mar 09
2
VP3 Compatibility and SIMD Optimizations
Hi,
A few questions: Is libtheora strictly backward compatible with VP3?
Can I set it up to shove raw VP3 data through and trust it to decode the
same way as On2's open source code did, loop filters and all?
Also, is libtheora just supposed to be a C-based reference
implementation? I was looking through the code and noticed a distinct
lack of any kind of optimizations. Naive tree-based
2005 Dec 19
1
Xiph QT Theora Codec
Taking a look ahead at your QT (OSX version) work, you have Theora
Encoding and Decoding on the list. This could be very beneficial as
many times the only way to get a constant frame-rate out of QT is to
export (and for DV video recorded in QT, this can be a large issue).
Another major issue is that the video coming from DV (at least the
sources I have used) is almost always
2002 Aug 05
3
Cross-Compiling VP3 lib on Linux
Hi,
I have been working with VP3 for some time now. Dan Miller from
On2 just told me about this list.
A few months ago, I managed to get On2's VP3 source snapshot to
compile under Linux, a feat that many have apparently attempted and
quickly abandoned. I compiled a small console app and the results of the
experiment are explained here: