similar to: Alpha 5 to Beta 1

I'm not sure if it was discussed earlier, but I've found nothing in the archives: (Will there be / Is there) a decoder library for Embedded Devices?

Hi there, I am new to Ogg/Theora and am trying to compare several video codecs as part of my master thesis at the University of Klagenfurt. Therefore I have a question: will there be any patents problems using Ogg/Theora in the future? Is/will Ogg/Theora stay free from patents rights? This would be a great advantage in using Ogg/Theora instead of e.g. H.264 which is covered with numerous

Hi there, I have an elementary question. Although theora can be placed in the same class of codecs as MPEG-1, -2, -4 why is there no greater usage of this codec? On the bigger part of web sites trailers or short videos are encoded with some mpeg codec. Why is theora still so rarely used and unfamiliar although it perfomes very well from my point of view? Is it, because - the whole mpeg family is

Hello, attached is a gzipped patch file to the lib/mcomp.c source file of theora (as of AnonCVS current version) that implements MMX and extended-MMX optimizations in the most frequently used functions of the encoder (as shown by gprof). This is more a proof of concept than a real request for inclusion into the source tree. My personal intent was more to look deeper into the MMX instruction set

Hi all, I'm a Theora noob and just taking a look at the theora-mmx package in hopes of making Thoggen run faster for DVD ripping. I've checked out the latest svn of the theora-mmx branch and trying to compile it on Ubuntu Dapper AMD64. I run autogen.sh, then make, and soon get the following errors: make[2]: Entering directory `/home/dlenski/theora-mmx/lib' if /bin/sh ../libtool

hi everybody! i have two questions: 1. which encoders do you recomend? i have tried most, and i am pretty unhappy with all of them :( . thoggen only works on linux and is very unstable (crashes always during the encoding process) and most frontends to encoder_example dont work or are very buggy. ogmrip also doenst look very promising since it seems to convert dvds into other lossy formats

Hello, in case somebody wants to test Theora without compilation, feel free to use konvalo.org's setup. It includes mplayer with theora from svn 2004-09-21 with Wim Taymans' mmx-patches from August 2004 applied (there are mplayer and mplayer.theora-mmx, the latter with decoder mmx-patches from VP3HoSwiYO) and a theora-encoder script (a bit slower than ffmpeg2theora as it runs several

Hello, in case somebody wants to test Theora without compilation, feel free to use konvalo.org's setup. It includes mplayer with theora from svn 2004-09-21 with Wim Taymans' mmx-patches from August 2004 applied (there are mplayer and mplayer.theora-mmx, the latter with decoder mmx-patches from VP3HoSwiYO) and a theora-encoder script (a bit slower than ffmpeg2theora as it runs several

Hi, Attached is a patch against 1.0alpha7 to speed up Theora decoding. It is about 15~20% faster in my test. It consists of following things: * MMX loop filter based on Rudolf Marek's patch in http://lists.xiph.org/pipermail/theora-dev/2005-August/002838.html * MMX IDCT based on Rudolf Marek's patch in http://lists.xiph.org/pipermail/theora-dev/2005-July/002816.html and the code in

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

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

Hi all, I've patched theora-mmx to build on x86_64. The patch against SVN is attached. Basically all I did was to copy lib/i386 to lib/x86_64 and tweak the assembler code a bit: * added to each file: typedef unsigned long int ogg_uint64_t * converted all asm inputs to 64-bit in: dsp_mmxext.c, fdct_mmx.c, recon_mmx.c * left all asm outputs at 32-bit * I didn't patch dsp_mmx.c, since all

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

Hello all, On more than one occasion I have advocated the use of liboil over incorporating mmx code into libtheora. The two main reasons are: 1) To keep optimisation code in one place and out of the library. Everywhere else in the Linux world there is a move to centralise in order to co-ordinate experts and reduce redundancy. This reason does not seem to find a lot of agreement in Theora as it

When using the IDCT routines, the C version [ lib/idct.c: oc_idct8x8_c(ogg_int16_t _y[64],int _last_zzi)] in libtheora 1.1.1, the decoded image is garbled. Is it functionally equivalent to the MMX optimized version [lib/x86/mmxidct.c: oc_idct8x8_mmx(ogg_int16_t _y[64],int _last_zzi)] ? I used some of the Theora video files from here: http://wiki.xiph.org/index.php/List_of_Theora_videos for

Hi. Has anyone tried http://svn.xiph.org/branches/theora-mmx this code on Win32 ? I can compile it with very small modification, 304c304 < ogg_int16_t *const temp= (ogg_int16_t*)align_tmp; --- > ogg_int16_t *const temp= (int16_t*)align_tmp; but outputs seem terribly broken. -> ex. http://mycomputer.cc/temp/mmx-out.ogg GCC version is 3.4.2. $ gcc --version gcc.exe (GCC) 3.4.2

Hi folks. Mozilla had some issues with the MMX optimized frag_recon functions over the last days, and I was able to track the problem down. The code itself is fine, but it unfortunately it has the tendency to cause a non-deterministic compiler bug. The whole discussion is here: https://bugzilla.mozilla.org/show_bug.cgi?id=474937 After thinking about the problem I've suggested to

Hi, We build a Voip client with Iaxclient(Jiaxclient+Iaxclient2.1beta1+Theora1.0+libvidcap0.21),when we established video call with resolution 640X480 in both sides,the CPU is consumed about 100%,the workload of Asterisk server is good at that moment.This issue does not exist with the resolution 320X240, the environment is as following, - CPU Interl Celeron 2.66GHz,RAM1GB, - Windows XP

Hi everyone, I wanted to throw out some data points on some of the theora optimization efforts. There are a few different efforts going on and it would be nice to unify all of those into something that can live in the main branch and be kept uptodate, while making it easy for people that want to contribute specific optimisations (we have one eager new powerbook owner ready to give the ppc ones a

hi, i was trying to enable the mmx code on mac os x. to get to that point one has to replace some inline assembler code: .balign 16 -> .p2align 4 and replace .rept .. .endr with #defines. but to makes things more complicated apple's GAS does not support movsx instructions and thus the following line does not work: " movsx %%di, %%edi \n\t" [ more details at