search for: melanson

...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 'theora-dev-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages...

...ng 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 xine: http://www.pcisys.net/~melanson/ffmpeg-vp3.jpg One day I will have to check out that "Brotherhood of the Wolf" movie since it is my primary VP3 test vector. Stay tuned... -- -Mike Melanson <p>--- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To...

Dan, In reviewing the code, derf came across the DCSearchPoints array in QuadCodeDisplayFragments(), encode.c:696. It looks like it specifies a search order for nearby coded fragments for prediction if there isn't a nearest neighbor. However, the upper search bound is defined as *0*, so the search loop (line 917) is never executed and it always falls back to the last coded fragment.

...pattern make you think of? <p> X -> X X -> X | ^ v | X <- X X <- X | ^ v | X X -> X X | ^ | ^ v | v | X -> X X -> X <p> -- -Mike Melanson <p><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 'theora-dev-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Un...

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 to get xine-ui if this is your first time using xine. 2) Download the...

...fragments from which to predict DC. While the code is there, DCSearchPointCount is set to 0 (while a legitimate calculation was commented out) which effectively short-circuits the DC search code. So, no DC searching in this version? Will it be back in another version? Thanks... -- -Mike Melanson <p><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 'theora-dev-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Un...

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 unsubscribe from this list, send a message to 'theora-dev-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages...

...MAX_ENTROPY_TOKENS (DCT_RUN_CATEGORY2 + 2) Yet, if you do math from all the preceding #defines (not easy given that each in a long chain of #defines is defined in terms of the previous #define), there are actually 32 tokens. Were there originally 35 tokens? Just curious... -- -Mike Melanson <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 'theora-dev-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe...

...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/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'theora-dev-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages...

...my inability to use diff correctly. The change in toplevel.c is trivial (new function names & params) huffman.c is the important one. I doubt anyone has touched it in a while so I suggest you use this (pulled out of CVS in the last couple days) -dan -----Original Message----- From: Mike Melanson [mailto:melanson@pcisys.net] Sent: Tue 5/27/2003 2:55 PM To: theora-dev@xiph.org Cc: Subject: Re: [theora-dev] resolution issues <p><p>On Tue, 27 May 2003, Henry Mason wrote: > On a somewhat related note, is there any reason to > encode at dimensions which are multiples of...

...base. 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. Have fun... -- -Mike Melanson <p><p>---------- Forwarded message ---------- Date: Sun, 4 May 2003 20:55:54 -0600 (MDT) From: Mike Melanson <melanson@pcisys.net> To: ffmpeg-devel@lists.sourceforge.net Subject: VP3 Is Here Hi, Sorry for the delay; I sort of went stagnant on multimedia hacking for the past 2 m...

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 me in the morning. But I completely revise...

Hi, Check it out-- another update in the space of a week: http://home.pcisys.net/~melanson/codecs/vp3-format.txt v0.4: March 2, 2004 - renamed and expanded section "Initializing The Quantization Matrices" - outlined section "Reconstructing The Frame" - moved Theora Differences Appendix to its own section entitled "Theora Specification" - added Appendix: Qua...

...els) are being copied from the source planes. I'm using the ThisFrameRecon YUV buffer pointer member of the PBI struct as the final display frame. I'm using the [Y|U|V]DataOffset members in order to index into the buffer. Is that the right thing to do? Thanks... -- -Mike Melanson <p><p><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 'theora-dev-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is n...

...lly, I would like to take the relevant portions of code from libflac that are in charge of decoding audio and create a decoder plugin for xine. Is there a function in the FLAC codebase that will take a chunk of FLAC-compressed data and output a buffer on decoded audio samples? Thanks... -- -Mike Melanson

Hi, The VP3 source code supports various CPU-specific optimized instructions. I see references to MMX and XMM (SSE2). I also see references to WMT. What is WMT? Thanks... -- -Mike Melanson <p><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 'theora-dev-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Un...

Mike Melanson: I want to store RGB values instead of YUV. I don't understand the theoretical and practical implications of this and that's why I'm asking about it. I would like to know whether it cannot work and why. I'm targeting a minimum Pentium 4 Celeron, 256MB RAM. Video resolution are about...

...use diff correctly. The change in toplevel.c is trivial (new function names & params) huffman.c is the important one. I doubt anyone has touched it in a while so I suggest you use this (pulled out of CVS in the last couple days) -dan -----Original Message----- From: Mike Melanson [mailto:melanson@pcisys.net] Sent: Tue 5/27/2003 2:55 PM To: theora-dev@xiph.org Cc: Subject: Re: [theora-dev] resolution issues On Tue, 27 May 2003, Henry Mason wrote: > On a somewhat related note, is there any reason to...

...gt; toplevel.c is trivial (new function names & params) > huffman.c is the important one. I doubt anyone has touched > it in a while so I suggest you use this (pulled out of CVS in > the last couple days) > > -dan > > > -----Original Message----- > From: Mike Melanson [mailto:melanson@pcisys.net] > Sent: Tue 5/27/2003 2:55 PM > To: theora-dev@xiph.org > Cc: > Subject: Re: [theora-dev] resolution issues > > > > On Tue, 27 May 2003, Henry Mason wrote: > > > On a somewhat related note, is there any reason to > > encod...

Mike Clark wrote: > I am interested. We have just started using Nagios, so this could be a > nice add-on. > > Mike Clark > > Jeremy Melanson wrote: > >> If anyone is interested, I can send the script (it's in Perl) and an >> example of how to check the PRI status in Nagios. >> >> I'd love to hear from other people about how to use it to check >> other Asterisk features too. >> I'm...