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Médias (91)

Autres articles (67)

  • Contribute to a better visual interface

    13 avril 2011

    MediaSPIP is based on a system of themes and templates. Templates define the placement of information on the page, and can be adapted to a wide range of uses. Themes define the overall graphic appearance of the site.
    Anyone can submit a new graphic theme or template and make it available to the MediaSPIP community.

  • Les formats acceptés

    28 janvier 2010, par

    Les 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 (...)

  • Support de tous types de médias

    10 avril 2011

    Contrairement à beaucoup de logiciels et autres plate-formes modernes de partage de documents, MediaSPIP a l’ambition de gérer un maximum de formats de documents différents qu’ils soient de type : images (png, gif, jpg, bmp et autres...) ; audio (MP3, Ogg, Wav et autres...) ; vidéo (Avi, MP4, Ogv, mpg, mov, wmv et autres...) ; contenu textuel, code ou autres (open office, microsoft office (tableur, présentation), web (html, css), LaTeX, Google Earth) (...)

Sur d’autres sites (6449)

  • Cutting a video accurately at a specific time without losing quality

    6 février 2018, par mdasari

    I am using ffmpeg to cut a video accurately at a given time to another time. I know, we can simply re-encode it, but will lose the quality. Also, I do not want to use copy option because of key frames issue (i.e, the video won’t be cutt accurately). These are the commands that I used.

    ffmpeg -ss 55 -i input.mp4 -t 00:03:06 -vcodec copy -acodec copy out.mp4 
    
ffmpeg -ss 55 -i input.mp4 -t 00:03:06 out.avi

  • mp4 video rotation metadata removal when cutting is specified

    5 mars 2019, par Horst Fiedler

    ffmpeg fails to remove rotate metadata if there are further options, e.g. -ss in commandline. The solution given here works only if -ss is missing, e.g.

    $ ffmpeg -i vid_20190302_162804987.mp4 -ss 6 -t 19 -metadata:s:v:0 rotate=0 -c copy 1.mp4

    fails (rotate=90 still in video metadata), while

    $ ffmpeg -i vid_20190302_162804987.mp4 -metadata:s:v:0 rotate=0 -c copy 1.mp4
    
$ ffmpeg -i 1.mp4 -c copy -ss 6 -t 19  2.mp4

    works fine (in 2 steps). Are there better solutions around ?

  • ffmpeg : segment muxer cutting segments early

    4 mars 2020, par M. Parker

    My current project is an attempt to use the segment muxer to divide an input stream into mp4 files of a particular duration (say, 3 seconds). Use of the segment_time option after allocating the muxer ought to have me covered. What I am seeing is segmenting based on a particular number of data units. If I try to copy the stream, it will cut the segment after 16 AVPackets have been sent to the output stream. If I try to encode it (libx264), the file will instead be written after 16 AVFrames. Changing the segment_time variable doesn’t alter the number of units written/file length, although larger numbers can result in errors. I figure I have to be missing something obvious. Any ideas ?

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