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The Great Big Beautiful Tomorrow
28 octobre 2011, par
Mis à jour : Octobre 2011
Langue : English
Type : Texte
Autres articles (98)
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MediaSPIP 0.1 Beta version
25 avril 2011, parMediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
The zip file provided here only contains the sources of MediaSPIP in its standalone version.
To get a working installation, you must manually install all-software dependencies on the server.
If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...) -
Installation en mode standalone
4 février 2011, parL’installation de la distribution MediaSPIP se fait en plusieurs étapes : la récupération des fichiers nécessaires. À ce moment là deux méthodes sont possibles : en installant l’archive ZIP contenant l’ensemble de la distribution ; via SVN en récupérant les sources de chaque modules séparément ; la préconfiguration ; l’installation définitive ;
[mediaspip_zip]Installation de l’archive ZIP de MediaSPIP
Ce mode d’installation est la méthode la plus simple afin d’installer l’ensemble de la distribution (...) -
Possibilité de déploiement en ferme
12 avril 2011, parMediaSPIP peut être installé comme une ferme, avec un seul "noyau" hébergé sur un serveur dédié et utilisé par une multitude de sites différents.
Cela permet, par exemple : de pouvoir partager les frais de mise en œuvre entre plusieurs projets / individus ; de pouvoir déployer rapidement une multitude de sites uniques ; d’éviter d’avoir à mettre l’ensemble des créations dans un fourre-tout numérique comme c’est le cas pour les grandes plate-formes tout public disséminées sur le (...)
Sur d’autres sites (7643)
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video playing sample on iPhone using libffmpeg
6 mai 2014, par deimuscan someone please provide a reference or an example on usage of libffmpeg library for playing video files not supported by apple.
Let consider mkv file.
I suppose the library decodes and passes the raw media data to AVFoundation objects to play it on device. Am I right ? -
how to play H264 mpegts in iphone
26 décembre 2012, par jAckOdEMy server encode video files (h264/acc, mpegts based format) by ffmpeg, and send to a client in a iPhonse. The default mediaplayer of ios sdk can not play those videos. How to play H264/mpegts in Ios ? Is there any opensource player for ios that can play h264/mpeg-ts file.
Thanks.
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Converting any video to iPhone - transcoding logic/algorithm ?
28 septembre 2012, par cajwineI have many-many video files in different formats (mostly avi). For example, some relevant lines from
ffprobe
:Duration: 02:27:14.70, start: 0.000000, bitrate: 664 kb/s
Stream #0.0: Video: mpeg4, yuv420p, 608x256 [PAR 1:1 DAR 19:8], 23.98 tbr, 23.98 tbn, 23.98 tbc
Stream #0.1: Audio: mp3, 44100 Hz, stereo, s16, 96 kb/s
Duration: 00:20:51.84, start: 0.000000, bitrate: 3286 kb/s
Stream #0.0: Video: mpeg4, yuv420p, 640x480 [PAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
Stream #0.1: Audio: mp3, 48000 Hz, stereo, s16, 128 kb/s
Duration: 01:26:01.84, start: 0.000000, bitrate: 845 kb/s
Stream #0.0: Video: mpeg4, yuv420p, 704x544 [PAR 1:1 DAR 22:17], 25 fps, 25 tbr, 25 tbn, 30k tbc
Stream #0.1: Audio: mp3, 44100 Hz, stereo, s16, 128 kb/s
Duration: 01:42:25.68, start: 0.000000, bitrate: 952 kb/s
Stream #0.0: Video: h264 (High), yuv420p, 600x244 [PAR 1:1 DAR 150:61], 25 fps, 25 tbr, 25 tbn, 50 tbc
Stream #0.1: Audio: mp3, 48000 Hz, stereo, s16, 112 kb/sAs you can see, the bitrates, video-sizes, codecs are vary. Want write a script (bash, perl) what will convert them for iPhone with
ffmpeg
.With googling i found many different ffmpeg profiles, but all profiles are "static", e.g. converts video to same resolution and this is probably not the right way, because i have many different video resolutions with many different bitrates. (this applies for the audio too).
I'm able write the script - but need help with one basic question.
I need help with the algorithm how to calculate the values for
ffmpeg
arguments from the aboveffprobe
results. E.g. when have video 704x544 and 845kb/s and another video with smaller size 640x480 but 3200kb/s bitrate - how to calculate the "right values" forffmpeg
in the script ?What is right algorithm/logic for transcoding video for the desired device ? (in my case iPhone)
If someone care, I have ffmpeg recompiled with "nonfree" codecs, and have mencoder (from mplayer package) too.
Second : In the avi containers are many videos already in the mpeg4 format. How to determine the "fastest" converting profile ? Mean a profile, where
ffmpeg
will only do the less-possible calculations, so probably will leave as-is : the format mpeg4, the size, the bitrate and "only" will change the container format. Is this possible ?I was read many
ffmpeg
SO questions, but not find answers - maybe I missed something. Can somebody point me to some good documents ?