search for: y4m

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: bitrate=2500:autoaspect:chroma_opt:vhq=4:bvhq=1:quant_type=mpeg:pass=1 The enco...

...om/webm/libvpx >> cd libvpx/ >> F="-no-integrated-as -fprofile-instr-generate"; CC="clang $F" >> CXX="clang++ $F" LD="clang++ $F" ./configure >> make -j32 >> # get sample video from from >> https://media.xiph.org/video/derf/y4m/akiyo_cif.y4m >> time ./vpxenc -o /dev/null -j 8 akiyo_cif.y4m >> >> When running single-threaded, -fprofile-instr-generate adds reasonable >> ~15% overhead >> (8.5 vs 10 seconds) >> When running with 8 threads, it has 7x overhead (3.5 seconds vs 26 >> seco...

...eo encoder. git clone https://chromium.googlesource.com/webm/libvpx cd libvpx/ F="-no-integrated-as -fprofile-instr-generate"; CC="clang $F" CXX="clang++ $F" LD="clang++ $F" ./configure make -j32 # get sample video from from https://media.xiph.org/video/derf/y4m/akiyo_cif.y4m time ./vpxenc -o /dev/null -j 8 akiyo_cif.y4m When running single-threaded, -fprofile-instr-generate adds reasonable ~15% overhead (8.5 vs 10 seconds) When running with 8 threads, it has 7x overhead (3.5 seconds vs 26 seconds). I am not saying that this flaw is a showstopper, but wi...

...he videos within <video>, but not as a standalone file (i.e., directly from the URL). I did not take the time yet to prepare a simple page to replicate this test in that manner. The two files I used for testing were the following: http://media.basilgohar.com/preview/theora/balcony-2-vga30p.y4m-q10.ogv http://media.basilgohar.com/preview/theora/balcony-4-vga30p.y4m-q10.ogv What inspired me to make this test is the fact that gmaxwell (I think) in #theora mentioned the problem, and linked to a reddit comment he made in response to someone's criticism of libtheora's quality compared...

As was briefly discussed on IRC, ffmpeg and mplayer currently output two somewhat incompatible YUV4MPEG streams. This meant that encoder_example could take input from mplayer, but not ffmpeg or movtoy4m (a QuickTime->Y4M tool). This is a patch that fixes this issue and should allow encoder_example to take input from either format: diff -urd xiph-cvs/theora/examples/encoder_example.c xiph-cvs-new/ theora/examples/encoder_example.c --- xiph-cvs/theora/examples/encoder_example.c Mon Jun...

...ow the result of the improved rate managemet in the theora codec. Can you tell which are the encoders that produced the two video matrix-580.ogg and matrix-55.ogg? I thought the first was the codec from theora trunk, and the second that of an old revision of theora-thusnelda. Also, is the original .y4m of the matrix movie available for download for testing? I tried some revision of theora-thusnelda encoder (including the last one), but seems that its quality is still lower than current theora trunk codec.

...bvorbis static libraries in vc++6. I'm testing the encoder for theora. I'm running tests on the encoder_example and i get the following errors in command prompt. C:\Users\Vista Business\Desktop\sahana\libtheora-1.1.1\theora\testbench\Debug>te stbench.exe -v 10 -o chk.ogv god.wav example.y4m-1 File god.wav is 16 bit 1 channel 11025 Hz RIFF WAV audio. File example.y4m-1 is 384x288 25.00 fps 420 video. Could not set keyframe interval to 64. Internal Theora library error. Appreciate all your help. regards, sahana. -------------- next part -------------- An HTML attachment was scrubbed.....

...in vc++6. I'm testing the encoder for theora. >I'm running tests on the encoder_example and i get the following errors in >command prompt. > >C:\Users\Vista >Business\Desktop\sahana\libtheora-1.1.1\theora\testbench\Debug>te >stbench.exe -v 10 -o chk.ogv god.wav example.y4m-1 >File god.wav is 16 bit 1 channel 11025 Hz RIFF WAV audio. >File example.y4m-1 is 384x288 25.00 fps 420 video. >Could not set keyframe interval to 64. >Internal Theora library error. > >Appreciate all your help. > >regards, >sahana. -------------- next part -----------...

Hello, i am member of red5 project. I am studying ways to integrate your codec into red5 and in a near future inside Flash Player. I want to figure some things about Theora codec. -> Is theora proper for live streams (i.e live transcondig webcam)? What is latency for encoding process? -> Is the format tolerant to lost frames? Thanks for the moment.

...MS/iperf-2.0.5-11.el6.anvil.src.rpm - -- Digimer Papers and Projects: https://alteeve.ca/w/ What if the cure for cancer is trapped in the mind of a person without access to education? -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBAgAGBQJVAfmcAAoJECChztQA3mh0w1IP/j/zfGFFzW11X+/Oz/QBr07g y4M+gYtPoNTRjQg96qufKo6m5C9RPWbNrC8z0SKw3sx0ZIfKithcNW9lznx0Hxyr P/aGnWXzmGY4R/P8hhZB9V73kVey3HNIJ8VOF59WlRrm1hGSUa8cftml0ns35LOd FD6g+vCpKXa+j/wKOmNYZfj3wAVi+c56hboedEV7T976A7IzM1r2Lm/XtrQg4Fo6 WlyM7j4f5OfY2kiwa/6/3hYjE794xddHhbCy1PePCpNLoigXQijvSfq8JP5qjaC4 OJv6CDITUD2O6YAcnF6R1h13LoU86Ro1a23v/qTtVBf...

hi all, i tried to encode a .yuv file with the encoder_example.c but it give an error message as follows ./encoder_example -v 1 file_1.yuv > file_1.ogg Input file file_1.yuv is neither a WAV nor YUV4MPEG2 file. so the error message is understandable for anyone. when this file is play with mplayer it shows as follow

Hi, I'm running wine-fbsd64-1.3.23,1 on FreeBSD 9.0-STABLE amd64. (it still as a 32-bit wine) I need to run avs2yuv.exe by using wine, which required avisynth.dll that I've installed successfully. When invoking Code: > wine avs2yuv.exe xxx.avs -o test.y4m I got Code: failed to load avisynth.dll partial log after setting WINEDEBUG=+module,+dll: (full: http://paste2.org/p/1870127) Code: trace:module:MODULE_InitDLL (0x10000000 L"avisynth.dll",PROCESS_ATTACH,0x0) - CALL trace:module:load_dll looking for L"KERNEL32.DLL" in L&qu...

Hello everyone, A network engineer buddy of mine brought up for discussion with me that he'd like to do some throughput testing, but he's new to Linux/RedHat. Is there any software I can recommend to him that any of you find above par for CentOS 6/7? Thanks! Gilbert ******************************************************************************* Gilbert Sebenste