similar to: Blockiness

Hi, So I have almost completed a new VP3 decoder implementation. In the course of doing so, I have encountered something odd about macroblock coding. As a quick overview, VP3 has a notion of fragments (8x8 pixels) and superblocks (32x32 pixels, 4x4 fragments). These apply to each individual plane (e.g., a 64x64 video will have 4 Y superblocks and 1+1 C superblocks, 64 Y fragments

Hello everyone, I'm developing software for a marketing company which creates multimedia presentations. We're currently using proprietary Windows software, but are looking for a royalty-free cross-platform solution. It's important that the solution is royalty- and patent-free because the presentations are copied and given out in large quantities for free (as in beer ;-) We are

On Wed, 1 Dec 2004 12:37:13 -0800 (PST), Ben Kirkpatrick wrote: > Do you find it difficult to manage four LD providers? > Can you show me part of your LD Macro and how it's used? > > I'm toying with two LD providers now, but don't have failover setup. >Just using each one for what they are best at (least cost). > >Thanks, >--Ben Kirkpatrick > > Not

I hope this list is small enough for not beeing banned when introducing oneself. So... Hi, I just subscribed to the theora-lists. I'm from the XVID project, so I know a deal about video and MPEG-4 in particular, but nothing about Vorbis/Theora etc., That's why I'm here, because I'm interested in patent-free alternatives. I guess there is no documentation of the current status

Hello there, I'm a university student and our professor assigned us as a project to build a theora encoder/decoder. I need some help on some info that I didn't manage to find in Theora's reference. I am building a function that calculates motion estimation. When making motion estimations must I scan each and every macroblock in coded order? After that the motion vectors should be

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, 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:

The list probably did not get this reply from D Richard Felker III. Having read quite a few patents I tend to agree with Richard: Software patents are very broad and even if I have not read the source code of Theora I would be surprised if it did not infringe several patents. However, I believe the argument that On2 has not been sued for infringing the MPEG-patents is a very strong argument.

Hi all I have some plots that I wish to write out to postcript files. I open the postscript device as suggested [postscript(file="foo.eps",...)], run my plotting commands, and close the device as suggested [dev.off()]. However, when I open the eps files in a postscript viewer such as the gimp, the resolution of the postscript images is *really* bad, very "blocky" and

Hi I was surprised with size of Theora files and thought of feedback. Following 1minute duration Theora and Xvid files were made from a y4m file. The resolution is 1280x720: 1. Xvid 17MB 2. Ogg/Theora Q7 31MB 3. Ogg/Theora Q8 38MB 4. Ogg/Theora Q9 49MB 5. Ogg/Theora Q10 61MB The Xvid file was made using mencoder by 2 passes with following options:

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

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

Create the ref_bo without any storage type flags set for now. This can probably be split up somehow later on, but this seems to work. Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu> Cc: "10.0" <mesa-stable at lists.freedesktop.org> --- Would be great if someone could see if this also makes MPEG4 work on NVA3+. In order to do that, remove the if (chipset < 0xc0)

Create the ref_bo without any storage type flags set for now. The issue probably arises from our use of the additional buffer space at the end of the ref_bo. It should probably be split up in the future. Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu> Tested-by: Martin Peres <martin.peres at labri.fr> Cc: "10.0" <mesa-stable at lists.freedesktop.org> ---

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.

http://bugs.freedesktop.org/show_bug.cgi?id=12794 Summary: swfdec_text_field_movie assertion on blocky.swf Product: swfdec Version: unspecified Platform: x86 (IA32) URL: http://www.shockwave.com/content/blocky/sis/blocky.swf OS/Version: Linux (All) Status: NEW Severity: normal Priority: medium

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

On Fri, Feb 13, 2015 at 9:52 PM, Ilia Mirkin <imirkin at alum.mit.edu> wrote: > On Fri, Feb 13, 2015 at 8:59 PM, Andy Lutomirski <luto at amacapital.net> wrote: >> My new GTX 960 (GM206, I think) says: >> >> [ 10.329351] nouveau ![ DEVICE][0000:09:00.0] unknown Maxwell chipset >> [ 10.329355] nouveau E[ DEVICE][0000:09:00.0] unknown chipset, 0x126010a1

I don´t found any patent around this but i ned help with the patents. I can´t found all patents for interlazed video and I only read the patents around MPEG , the optimization for field based video can be aplied without problem, this is compatible whih the progresive encoding and in a few scenarios they can be positive. <p>process: <p>common: -2 bits to indicate video type 0x

this sample is very blocky, the older version seems to do much better and less blocky video. i'm not sure if my 1.9ghz 1 gb ram is the problem here or the encoder has hicups on this new libtheora 1.1 20090806 (Thusnelda). please advice how to fix this or should i use the older version. this encode was 2 pass with horrible output. http://www.megaupload.com/?d=NDGY0EAL General ID