similar to: More examples?

Hello list, When I convert an yuv pixel into rgb using the recipies in http://www.fourcc.org/fccyvrgb.php I get an accurate color conversion but the contrast seems to be decreased. If i write, e.g., the pixel directly into an sdl yuv_overlay, I get a well-contrasted frame, however, if I convert the pixel to rgb and call SDL_MapRGB, I get a contrast-decreased frame. Thanks, Ribamar

On Fri, 4 Jun 2004, Makc wrote: > Here's what you can find in the net on YUV scheme: Hmm? What prompted this? > The statement I care to make here, is simply that there ain't neither > such thing as "luminance", which details "the eye is more sensitive to", "ain't neither"? Double negative, so I take your statement to mean that there *is* such

Hi, I heard that Theora will be used on OLPC. Is anyone working on optimization for OLPC? Regards, Chih-Chung Chang

I've spent the weekend or so trying to get my head around Theora and I'm just not having any luck. First of all, I really don't have any interest in immersing myself in video encoding--I just have one simple thing I'd like to do--so I haven't spent any time reading about the theory or specs or anything like that. I'm attempting to write a "render-to-theora"

Hi, I'm attempting to decode Theora videos on a PowerPC running a Linux 2.6.19 kernel. The version of GCC I'm cross-compiling from is 3.4.4. The software versions I'm running are: libogg-1.1.3 libpng-1.2.20 libtheora-1.0beta1 libvorbis-1.2.0 These are all the latest I was able to download. Here's a back trace I got while running "dump_video" under

Hello, I wrote a theora video encoder based on etheora (and the examples provided with it) for Processing IDE (processing.org). I have some problem with the quality of encoded frames. eg. http://poux.be/tmp/movie.ogg And when I play the movie with mplayer or totem, the video resolution is changed from 640x480 to 854x480 (when i use ETHEORA_ASPECT_NORMAL in etheora_enc_setup). And if I try to

hi folks! once again i am trying to decode a yuv_buffer to a 24 bit RGB buffer. last time nobody seemed willing to tell me how to do this, so i am trying again. i try to make my questions more simple. what i need to know is: how many bytes are in each y, u, v array? what for are these strides? what exactly is a "plane" in a frame, and what does it do? what i want to achieve is

1. "dump_video.c" got reverted back by 5 years into 2004: https://trac.xiph.org/browser/trunk/theora/examples/dump_video.c https://trac.xiph.org/log/trunk/theora/examples/dump_video.c 2. "png2theora.c" (subminor) https://trac.xiph.org/browser/trunk/theora/examples/png2theora.c 207 /* Must hold: yuv_w >= w */ 208 yuv_w = (w + 15) & ~15; 209 210 /* Must hold:

the files produced by windows compile vs. Linux are indeed significantly different in size (about 140K vs. 160) However I'm not convinced all the default parameters are set the same way in the two example files. This needs to be verified to see if there really is a bug, or can the two versions produce byte-equal output streams? <p> ___ Dan Miller (++,) Founder, On2 Technologies

Hi, I guess this is a good time to start putting together a wish list for a video codec. I see that for audio the compression is around 10X for reasonable quality. I am sure this will start its own thread of conversation. For video you can do 40X fairly easily and the big task is to go to 80X or 100X with reasonable picture quality, say, a peak luma SNR of more than 30 dB. Uncompressed

On Tue, Nov 08, 2005 at 06:08:25PM +0800, illiminable wrote: > Why not just make it OggRawFOURCC, do we really need one stream format for > rgb, and one for yuv ? [snip] > I just meant oggRaw, not fourcc. Oh, thank god you corrected this. :-) I was contemplating an "OggVid" format, and here is why I'm steering against it (though, yes, this has been a topic of

On Tue, Nov 08, 2005 at 06:08:25PM +0800, illiminable wrote: > Why not just make it OggRawFOURCC, do we really need one stream format for > rgb, and one for yuv ? [snip] > I just meant oggRaw, not fourcc. Oh, thank god you corrected this. :-) I was contemplating an "OggVid" format, and here is why I'm steering against it (though, yes, this has been a topic of

I have a question about a movie I 've encoded with libtheora. It's a video 2000x2000 with Theora codec and no audio. The video is fine with some players, but it isn't read in youtube. http://www.ibiiztera.be/others/test3.ogv -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hey guys, there seem to be a problem with wget and/or the unicode webserver. During the make process there are several files wich are download from the unicode server. I can access them manually but both curl and wget failing to get it. Are they any other mirrors or anyone else expiring this bug? Greetings

On 17.01.2011 12:35, Raju wrote: > Dear friends > Recently i have downloaded Theora video codec from http://www.xiph.org/ > , > here its having both encoder and decoder , how can i build only > decoder on VC + windows platform , if i build now i will be getting " > Cannot open include file: 'ogg/ogg.h': No such file or directory " > pls send me solution for

Dear Developers. As a tester for gnome-2.7 I'm using the garnome build system to build gnome-2.7. A new part to this set of gnome related programs I neede libtheora. Unfortunatly did I run into compile problems when running the compile of libtheora-1.0alpha3. I'm uisng GCC-3.4.0,glibc-2.3.2. The problems are shown in the log below. Who can help me solve these issues as I'm no expert

Theora hardware with LEON3 is runinng!!! My video was too slow, then I discovered that the problem was on LINUX! I don't exactly, but I suppose that the time of LINUX Call systems (like fread()) is the problem. If I don't use the linux (like is done on NIOS), I can to decode much faster than the time of exibition! Now we have two points on software (the hardware is the same,

This fixes a crash when multiple PM engine contexts are created. Signed-off-by: Samuel Pitoiset <samuel.pitoiset at gmail.com> Reviewed-by: Martin Peres <martin.peres at free.fr> --- drm/nouveau/nvkm/engine/pm/base.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drm/nouveau/nvkm/engine/pm/base.c b/drm/nouveau/nvkm/engine/pm/base.c index 2006c44..274457c

Have used Centos 5 now couple of weeks and started to find pieces on places, ie. found logs :D Now, these ntpd errors strances me. Anyone else getting these? Errors frequency error 500 PPM exceeds tolerance 500 PPM: 1 time(s) frequency error 503 PPM exceeds tolerance 500 PPM: 1 time(s) frequency error 504 PPM exceeds tolerance 500 PPM: 1 time(s) frequency error 505 PPM exceeds

I have a data frame consisting of three columns(name of compund,ppm and frequency).Name contains string values .ppm and frequency contains numeric values with decimal points upto four digits. I have an excel sheet which is like a library.The first column contains the name of compounds and remaining column contains the ppm values of the compound which satisfy certain rules.The number of ppm values