similar to: VP3 vs CPU

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,

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

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

Hi, Is there anything special I need to know about VP3's IDCT? I mean besides the fact that there are separate IDCTs to handle sparse coefficient matrices. Are the IDCT functions mathematically equivalent to any textbook IDCT functions? Thanks... -- -Mike Melanson --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To

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

I am very interested in this thread. I am willing to pitch in and help get the conversion finished. Are there any resources already completed? Have proper Makefiles been created yet? Where do I need to start? Ed Okerson --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to

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Apparently, this hang can be fixed at small performance cost by setting NOUVEAU_VP3_DEBUG_FENCE 1 (as opposed to default 0) in https://cgit.freedesktop.org/mesa/mesa/tree/src/gallium/drivers/nouveau/nouveau_vp3_video.h Now, what exactly fixes my hangs (or make them less severe) - still open question, guess I can flip few of those debug defines and try to find out ... Currently at mesa Mesa

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

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.

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

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 (1.0-beta4, released today). If you

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

It looks like there's more QT 6 trouble, and this is specific to the post-3.2.5.x builds. I'm on it, and will try to sort things out by Monday. Cheers, Eric (not a happy camper!) --- From a note I sent to Dan Miller: The "3.2.2.0" binaries on www.vp3.com fail with an error I haven't seen before--"You may experience problems playing a video track in credits_v.mov

Hi, Quick note: In case anyone has not heard, Nullsoft, the people behind Winamp, have seen fit to develop their own multimedia container format. It can hold any kind of data, but their primary codecs are MP3 for audio and VP3 for video: http://www.nullsoft.com/nsv/ I and a few other people are still working out the details of the format:

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.

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

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

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 13:06:37 -0700 (PDT) From: Steven M. Schultz