search for: vp3

Hi, I don't know how much of the old VP3 codebase is incorporated into Theora. I wrote ffmpeg's VP3 decoder from scratch but eventually ported in the original VP3 IDCT function. A BSD conflict cropped up that I thought I would pass along. -- -Mike Melanson <p>---------- Forwarded message ---------- Date: Wed, 10 Sep 2003 13:...

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-l...

...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 state of the filespec, besides this: > Yes, some portions of the VP3 codec are covered by patents. However, the > Xiph.org Foundation has negotiated an irrevocable free license to the VP3 > codec for any purpose imaginable on behalf of the public. So my question is, is it alright to create and distribute a Theora codec which isn't based on the Theora code...

Hi, Some of you may recall that I got the VP3 decoder working with the xine multimedia player some time ago and posted a patch for anyone else to try. I really messed up when I did that since I generated the patch against some random CVS snapshot of xine-lib. I did better this time and generated the patch against the latest release of xine-lib...

--- 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...

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=8476744ba50d26a3e188def192cd9086b0f...

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 thi...

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 now need to implement the compression for multiple video feeds. So I was wondering: - Would VP3 be able to "handle" these multiple video feeds automatically in terms of...

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...

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 Quick...

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

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

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). This version can be retrieved using the Component Manager. I've also attached a HACKING.txt file which can go in Codecs/quickt...

Hi, Sorry for taking so long with this, but I finally committed a first pass of my own VP3 decoder to the ffmpeg codebase. You can browse the source here: http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/ffmpeg/ffmpeg/libavcodec/ vp3.c and vp3data.h are the files in question. Attached is a message I sent to the ffmpeg-devel list about the new decoder and its present shortcomings....

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...

The site: http://www.techimo.com/articles/index.pl?photo=33&SID=12&tag=SNnb323 has a review & comparison of several mpeg-4 codecs, and they also include vp3. (Be warned, it's a very big web page, due to all of the image examples!) Not really all that informative, but I thought somebody might be interested in hearing about it. *** On2 VP3 3.2.5.0 Positive: extreme low bitrate imaging efficiency Negative: fine detail blurring, fixed setting dec...

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 opti...

Supposedly On2 transferred their Video Recorder and TrueCast5 streaming server into opensource along with VP3. Theora is obviously the VP3 project, and while I can find nothing on Xiph about it, the recorder source is offered on vp3.com; but I can find nothing on Xiph or vp3.com about what happened to Truecast5. I contacted On2 about whether TrueCast5 was really going to be open source, and they simply r...

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...

...to do also the UnPackVideo. The problem with UnPackVideo is because has a lot decison (if's and else's), I think it better to do in a processor. What do the function dsp_save_fpu() do? (it is betweet the UnPackVideo and ReconRefFrames) 5 - To put the current Hardware Theora of old for new VP3 codebase. Timothy told me about the old and new VP3 codebase, but I am a little confused. I read the vp3-format.txt and I saw that theora/doc/vp3- format.txttheora-old/doc/vp3- format.txt are the same file. In don't know If i am understanding something wrong. In the specification of Theora, I...