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Autres articles (62)
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Des sites réalisés avec MediaSPIP
2 mai 2011, parCette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page. -
HTML5 audio and video support
13 avril 2011, parMediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
For older browsers the Flowplayer flash fallback is used.
MediaSPIP allows for media playback on major mobile platforms with the above (...) -
Librairies et binaires spécifiques au traitement vidéo et sonore
31 janvier 2010, parLes logiciels et librairies suivantes sont utilisées par SPIPmotion d’une manière ou d’une autre.
Binaires obligatoires FFMpeg : encodeur principal, permet de transcoder presque tous les types de fichiers vidéo et sonores dans les formats lisibles sur Internet. CF ce tutoriel pour son installation ; Oggz-tools : outils d’inspection de fichiers ogg ; Mediainfo : récupération d’informations depuis la plupart des formats vidéos et sonores ;
Binaires complémentaires et facultatifs flvtool2 : (...)
Sur d’autres sites (6907)
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Processing yuv4mpeg by hand
15 avril 2014, par user3534466Theoretical question.
I have named pipe(windows) with uncompressed-video yuv4mpeg and uncompressed-audio pcm. I need to read this stream in my program and render it to bitmap.
If I realy understood description of yuv4mpeg http://wiki.multimedia.cx/index.php?title=YUV4MPEG2, there are simple YCbCr-images after header.
Is it simple way to processing and rendering this data by my own code C++ without any libraries (ffmpeg) ?
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What's the difference with crf and qp in ffmpeg ?
12 novembre 2024, par NovaI read https://trac.ffmpeg.org/wiki/Encode/H.264 about h264 encoding and discovered
qp
.

Q1 : What are the differences with crf and qp ?

Q2 : Is it better to use qp over crf overall, or is it only if for using qp 0 for best lossless ?

Q3 : Does qp have a known sensible setting if it's preferred ? So far, I know crf has the default value of 23 while 18 is a sensible preferred increase in quality, although I don't understand why 18 wouldn't be default if better sensible lossless.

Q4 : Would changing either of them cause incompatibility with non-ffmpeg players or just qp ?

I'm converting from webm to mp4.


I was going to test crf 23 and 18 and pick which is best but I can't seem to find any concrete information on this comparison or about
qp
.

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how to embed subtitle to a video file without burn (html5)
26 juin 2015, par haybeyei’ve a cdn hosting and there are some video files on it. and i’ve subtitles for videos. as you know, osx or ios doesn’t allow subtitles on fullscreen mode. i’ve found a solution with ffmpeg (burning) but it burns video with hardcode :
https://trac.ffmpeg.org/wiki/HowToBurnSubtitlesIntoVideo
is there any other way to do it without hardcode (maybe a media server) ? because i’ve 5 different subtitles for each video file. and can’t do it with hardcode.
any helps would be great..
best regards.