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Autres articles (45)
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La file d’attente de SPIPmotion
28 novembre 2010, parUne file d’attente stockée dans la base de donnée
Lors de son installation, SPIPmotion crée une nouvelle table dans la base de donnée intitulée spip_spipmotion_attentes.
Cette nouvelle table est constituée des champs suivants : id_spipmotion_attente, l’identifiant numérique unique de la tâche à traiter ; id_document, l’identifiant numérique du document original à encoder ; id_objet l’identifiant unique de l’objet auquel le document encodé devra être attaché automatiquement ; objet, le type d’objet auquel (...) -
Websites made with MediaSPIP
2 mai 2011, parThis page lists some websites based on MediaSPIP.
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Creating farms of unique websites
13 avril 2011, parMediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...)
Sur d’autres sites (9236)
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h264 : manually save/restore XMM registers for functions using INIT_MMX.
7 février 2012, par Ronald S. Bultjeh264 : manually save/restore XMM registers for functions using INIT_MMX.
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h264 : mark h264_idct_add8_10 with number of XMM registers.
4 février 2012, par Michael Kostylevh264 : mark h264_idct_add8_10 with number of XMM registers.
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H264 encoder settings
30 novembre 2011, par Chris RobinsonI'm using xuggler to encode a series of images to an MP4 file. I use the following code to setup the
IStreamCoder
and specify the H264 codec :// only set if codec is H264
Configuration.configure("/usr/local/xuggler/share/ffmpeg/libx264-hq.ffpreset",
outStreamCoder);
outStreamCoder.setNumPicturesInGroupOfPictures(12);
outStreamCoder.setCodec(codec);
outStreamCoder.setBitRate(videoSettings.getBitrate());
outStreamCoder.setBitRateTolerance(videoSettings.getBitrateTolerance());
outStreamCoder.setPixelType(IPixelFormat.Type.YUV420P);
outStreamCoder.setHeight(videoSettings.getResolution().height);
outStreamCoder.setWidth(videoSettings.getResolution().width);
outStreamCoder.setFlag(IStreamCoder.Flags.FLAG_QSCALE, true);
outStreamCoder.setGlobalQuality(0);
fps = IRational.make((int) videoSettings.getFramerate(), 1);
outStreamCoder.setFrameRate(fps);
outStreamCoder.setTimeBase(IRational.make(fps.getDenominator(), fps.getNumerator()));which yields the following output :
Codec: CODEC_ID_H264
Resolution: 1280x720
Bitrate: 25000
Bitrate Tolerance: 1000
Framerate: 25.0Now when I specify the MPEG4 codec, I get the following output :
Codec: CODEC_ID_MPEG4
Resolution: 1280x720
Bitrate: 25000
Bitrate Tolerance: 1000
Framerate: 25.0As you can see, the only difference is the
ICodec
type (MPEG4 instead of H264) and the use of the preset (which is required by xuggler when using an H264 codec). Can anyone explain to me the huge difference in quality and tell me how to resolve the issue ?