search for: dump_video

Hello, I want to make a program to extract frame from a theora movie as images. I tried with the decoding example located at theora web site (dump_video.c. I use it to extract a frame as yuv image but when I try to convert it to ppm with yuvtoppm program i obtain a strange image ( see http://poux.be/tmp/file.ppm ). I think it's a problem with the byte order for yuv, but don't I don't know anything about this format. I'd like to ma...

...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 in C coding. Best regards, Stef Making all in examples mkdir .libs cc -o .libs/dump_video dump_video.o -L/usr/test/garnome3/lib -L/usr/X11R6/lib ../lib/.libs/libtheora.so /usr/local/lib/libogg.so -Wl,--rpath -Wl,/usr/test/garnome3/lib creating dump_video cc -o .libs/encoder_example encoder_example.o -L/usr/test/garnome3/lib -L/usr/X11R6/lib ../lib/.libs/libtheora.so /usr/lib/libvorbis...

...x 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 GDB (I've escaped non-ascii characters as "\xxx" for the purpose of keeping the mailer happy). I get similar results using "player_example" and when using mplayer with libtheora support. By the way, mplayer with native VP3 support works fine. > gdb examp...

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 hol...

...tem call. http://www.students.ic.unicamp.br/~ra031198/theora_hardware/9_integration_video.png [b] Theora without LINUX: Here, we can to decode much faster that the time of exibition. But, without LINUX, we can't to use a .ogg file directly, we need to convert it in a vector and to compile with dump_video (the Leonardo also needs to do it on NIOS). http://www.students.ic.unicamp.br/~ra031198/theora_hardware/12_theora.png The next step will be to do plug it (the system [b]) on the SRAM memory in order to increase the resolution. The most important is that now we have a complete theora decoding on F...

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

Today I've got first video clips made by the camera and compressed "on the fly" - 1280x1024x30fps. Image quality is far from perfect - I don't have yet any way to preview images, and a single acquisition still requires a bunch of commands. So I'm really close to have a camera that will be able to serve the Ogg/Theora streams, now but will it be possible to play it on a PC? I

Hello, once again I have the great pleasure to announce the release of a new Theora version - please welcome libtheora beta 2! Changes for this version: libtheora 1.0beta2 (2007 October 12) - Fix a crash bug on char-is-unsigned architectures (PowerPC) - Fix a buffer sizing issue that caused rare encoder crashes - Fix a buffer alignment issue - Build fixes for MingW32, MSVC - Improved

Hello, once again I have the great pleasure to announce the release of a new Theora version - please welcome libtheora beta 2! Changes for this version: libtheora 1.0beta2 (2007 October 12) - Fix a crash bug on char-is-unsigned architectures (PowerPC) - Fix a buffer sizing issue that caused rare encoder crashes - Fix a buffer alignment issue - Build fixes for MingW32, MSVC - Improved

...onfigure --with-ogg=$HOME The build succeeds also it shouldn't (I don't have ogg installed at $HOME). As an example here is the last line that make executes. gcc -I/usr/local/include -Wall -Wno-parentheses -O3 -fforce-addr -fomit-frame-pointer -finline-functions -funroll-loops -o .libs/dump_video dump_video.o ../lib/.libs/libtheora.so -L/usr/local/lib /usr/local/lib/libogg.so . Btw - my problem is exactly the other way around. I try to link to a cross-compiled libogg that resides in $HOME, but configure insists of using the libraries from /usr/ocal/lib where the x86 version is located....

...g.h': No such file or directory " > pls send me solution for htis to builld and run this code and what are > test vectors i can use for this decoder > Hi Raju, libtheora has libogg as dependency and for the encoder_example also libvorbis. Here are the steps to compile libtheora, dump_video, and encoder_example: 1. Download libogg-1.2.2.zip <http://downloads.xiph.org/releases/ogg/libogg-1.2.2.zip> and unpack the zip file into a folder, let say d:\build 2. Build libogg by launching d:\build\libogg-1.2.2\win32\VS2008\libogg_static.sln 3. Download libvorbis-1.3.2.zip <http://do...

...-1.0alpha5.zip Change summary: (libtheora-1.0alpha5 released 2005 August 20) * Fixed bitrate management bugs that caused popping and encode errors * Fixed a crash problem with the theora_state internals not being intialized properly. * new utility function: - theora_granule_shift() * dump_video example now makes YUV4MPEG files by default, so the results can be fed back to encoder_example and similar tools. The old behavior is restored through the '-r' switch. * ./configure now prints a summary * simple unit test of the comment api under 'make check' * misc code cl...

Has anyone posted a data structure dump of one of the sample Theora files for use in verifying a new decoder? For example, the the loop filter limits I've decoded for the 320x240 example file are: Loop Filter Limits (6 bits per limit) 00: 37 26 11 39 3E 1C 1B 1E 08: 0D 0C 2A 0D 35 24 14 02 16: 22 39 38 34 3C 18 18 14 24: 0A 0A 09 0D 04 04 22 21 32: 11 31 20 20 30 10 10 00 40: 08 00 00 00

...-1.0alpha5.zip Change summary: (libtheora-1.0alpha5 released 2005 August 20) * Fixed bitrate management bugs that caused popping and encode errors * Fixed a crash problem with the theora_state internals not being intialized properly. * new utility function: - theora_granule_shift() * dump_video example now makes YUV4MPEG files by default, so the results can be fed back to encoder_example and similar tools. The old behavior is restored through the '-r' switch. * ./configure now prints a summary * simple unit test of the comment api under 'make check' * misc code cl...

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

Has anyone posted a data structure dump of one of the sample Theora files for use in verifying a new decoder? For example, the the loop filter limits I've decoded for the 320x240 example file are: Loop Filter Limits (6 bits per limit) 00: 37 26 11 39 3E 1C 1B 1E 08: 0D 0C 2A 0D 35 24 14 02 16: 22 39 38 34 3C 18 18 14 24: 0A 0A 09 0D 04 04 22 21 32: 11 31 20 20 30 10 10 00 40: 08 00 00 00

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

I'm interested in ignoring the audio stream in a theora encoded file. My first attempt was to remove the test for vorbis: /* identify the codec: try theora */ if(!theora_p && theora_decode_header(&ti,&tc,&op)>=0){ /* it is theora */ memcpy(&to,&test,sizeof(test)); theora_p=1; }else if(!vorbis_p &&

...ame I'm working on, there is an 3D TV-screen onto which I project the frames of a movie. The movie is of course stored as theora, no audio as it's not needed yet. I have it working so far, extracting a frame and uploading it to the graphics card when the scene is drawn. The example file dump_video.c gave me most of what I needed. ...But I can't seem to handle end-of-stream very well. I would like to be able to rewind. First I tried the brute force method: if (videoStream.eof()) { ogg_stream_clear (&theoraStreamState); theora_clear (&theoraState); theora_comment_...

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