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Somos millones 1
21 juillet 2014, par
Mis à jour : Juin 2015
Langue : français
Type : Video
Autres articles (103)
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Encoding and processing into web-friendly formats
13 avril 2011, parMediaSPIP automatically converts uploaded files to internet-compatible formats.
Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
All uploaded files are stored online in their original format, so you can (...) -
Les formats acceptés
28 janvier 2010, parLes commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
ffmpeg -codecs ffmpeg -formats
Les format videos acceptés en entrée
Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
Les formats vidéos de sortie possibles
Dans un premier temps on (...) -
Gestion de la ferme
2 mars 2010, parLa ferme est gérée dans son ensemble par des "super admins".
Certains réglages peuvent être fais afin de réguler les besoins des différents canaux.
Dans un premier temps il utilise le plugin "Gestion de mutualisation"
Sur d’autres sites (6930)
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FFMPEG Concat Dropping Frames
16 mars 2015, par scientifficI’m using FFMPEG to do the following two things :
- create an mp4 given a set of images
- compile mp4s to create a longer video (mp4)
To create mp4s from images, I use the following command :
ffmpeg -r 5 -i 'img%03d.jpg' output.mp4
As far as I know, this creates a video with a framerate of 5fps.
But when I try to compile mp4s, it seems like frames within each mp4 are being dropped.
To create the compiled footage, I create a text file that points to all the mp4s that should be included in the compilation, e.g.
file 'set1/output.mp4'
file 'set2/output.mp4'
file 'set3/output.mp4'
file 'set4/output.mp4'
file 'set5/output.mp4'
file 'set6/output.mp4'
file 'set7/output.mp4'Then I run the following command :
ffmpeg -f concat -i input.txt -codec copy compilation.mp4
The resulting video seems to drop 2-3 frames from each of the output videos.
How do I ensure that the compiled video doesn’t drop any frames ?
(For reference, I used the following tutorial : https://trac.ffmpeg.org/wiki/Concatenate)
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compile the ffmpeg3.3 for Mac OS show ERROR : libmp3lame >= 3.98.3 not found
4 mars 2018, par MR.PJI use my mac to compile the ffmpeg3.3 for Mac OS according to https://trac.ffmpeg.org/wiki/CompilationGuide/macOS.I tried the first(which through Homebrew) and third(which builds it yourself) method,the first method is ok.
But the third, compiling FFmpeg myself and Installing dependencies with Homebrew.I don’t know the meaning of this sentence enter image description here
after this step :
./configure --prefix=/usr/local --enable-gpl --enable-nonfree --enable-libass \
--enable-libfdk-aac --enable-libfreetype --enable-libmp3lame \
--enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libopus --enable-libxvid \
--samples=fate-suite/terminal show :
RROR: libmp3lame >= 3.98.3 not found
when I use
locate libmp3lame.a
,it is at ’/usr/local/Cellar/lame/3.99.5/lib/libmp3lame.a’.I also try
--enable-libmp3lame --extra-ldflags=-L/usr/local/lib
to solve,but it is no effect.How to solve this
ERROR: libmp3lame >= 3.98.3 not found
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Révision 17407 : on avance sur le dateur :
14 mars 2011, par b b* formatage + texte_script sur les chaines de langue et pas de ucfirst * ajout de quelques chaines de langue pour les abbreviations de mois cf http://fr.wikipedia.org/wiki/Mois