search for: vp31

Displaying 9 results from an estimated 9 matches for "vp31".

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2002 Oct 09
1
Why is vp31 codec 2x - 3x slower than DivX codec ?
I have a simple test program which encodes, decodes and displays a single video stream ( at 2-3 fps ). It takes about 15% of CPU time when it uses DivX codec, but 35% when the VP31 codec is active. Is there any way to speed encoding/decoding with VP31 ? Or maybe VP31 is just much slower than DivX ? Kamil <p>--- >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 '...
2003 May 07
2
VP30
Hi, Can anyone tell me the significant differences between VP30 and VP31 (or are you allowed to)? Are there different token and quantizer tables? Are there algorithmic differences? I have a VP30-encoded file that plays with the VP3 VfW DLL but not with the open source decoder. Thanks... -- -Mike Melanson --- >8 ---- List archives: http://www.xiph.org/arc...
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 Sep 02
2
Installing vp31vfw.dll - how?
Hello, We put the DirectShow filters on hold till the release of our software (next week) and will integrate it into the first patch. Till then, our customers will ahve to live with a VP31 vfw hack. Now, my problem is that I need to integrate the vp31vfw.dll setup into a MSI file, because spawning another installer is not exactly an option. Can anyone post a list of complete registry keys that I need to push? My main prob,em is - I also downloaded the sources, but the .INF file te...
2002 Sep 16
2
Can't find the setup code
Well, I've been slamming my head against this all night, so it's time to ask for help... Having gotten together a reasonably decent port of what I thought was the whole API to the Ogg Way, complete with Ogg mem management and bitpacking, I started digging deeper in the code... only to find that it looks like I only have a middle stream handler. The encode and decode code both assume that
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
2003 Feb 19
4
Block Coding Pattern
...coder version < 6 and the second pattern is used in encoder version >= 6. None of the code to support the second pattern is ever called. Is there an encoder with a version >= 6? The code in question is QuadDecodeDisplayFragments() vs. QuadDecodeDisplayFragments2() in CoreLibs/CDXV/Vp31/dx/generic/Frarray.c. They follow different pattern rules. But the second version is never called. Thanks... -- -Mike Melanson --- >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 ...
2007 Mar 25
3
MMX patch to speed up Theora decoding
...s: * 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 http://svn.xiph.org/trunk/vp32/CoreLibs/CDXV/Vp31/dx/win32/ * change FiltBoundingValue to ogg_int16_t and reduce it to 256 entries. (It is safe if I read the spec correctly) * comment out unused idct_short__c, remove unused LoopFilterLimitValuesV2 An --enable-mmx option is added to configure (you need to run autogen.sh to enable it after patch)....
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