Recherche avancée

Médias (91)

Autres articles (111)

  • Changer son thème graphique

    22 février 2011, par

    Le thème graphique ne touche pas à la disposition à proprement dite des éléments dans la page. Il ne fait que modifier l’apparence des éléments.
    Le placement peut être modifié effectivement, mais cette modification n’est que visuelle et non pas au niveau de la représentation sémantique de la page.
    Modifier le thème graphique utilisé
    Pour modifier le thème graphique utilisé, il est nécessaire que le plugin zen-garden soit activé sur le site.
    Il suffit ensuite de se rendre dans l’espace de configuration du (...)

  • 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 (...)

  • Initialisation de MediaSPIP (préconfiguration)

    20 février 2010, par

    Lors de l’installation de MediaSPIP, celui-ci est préconfiguré pour les usages les plus fréquents.
    Cette préconfiguration est réalisée par un plugin activé par défaut et non désactivable appelé MediaSPIP Init.
    Ce plugin sert à préconfigurer de manière correcte chaque instance de MediaSPIP. Il doit donc être placé dans le dossier plugins-dist/ du site ou de la ferme pour être installé par défaut avant de pouvoir utiliser le site.
    Dans un premier temps il active ou désactive des options de SPIP qui ne le (...)

Sur d’autres sites (9974)

  • FFMPEG - How to Extract Frames As Images While Removing Sequentially Duplicate Frames

    19 mars 2017, par Michael Nelson

    Is there any way (via script or preferably some parameter in calling ffmpeg that I missed) to extract frames from an avi file and ignore sequentially duplicate frames, thus being able to go through the pictures looking only at the deltas/changes ?

    I frequently have to record meetings at work and a lot of the time, the client screen that I am looking at is not changing while we are talking over the phone. After the meeting is over, I need to use these images as part of our documentation and specifications gathering.

    I know that I could just output every frame and run them through any given duplicate file remover utility, but this would remove ALL duplicate frames. So, if the frames extracted went like this :

    A, A, A, B, B, B, B, C, C, A, A, C, C, C, B, B, B ...

    Running them through a typical duplicate file remover, I would get : A, B, C

    What I would want is : A, B, C, A, C, B

    The command that I am currently using to extract the images is :

    ffmpeg.exe -i file.avi -ss 0 -sameq -f image2 -r 1 images%5d.png

    I was getting every frame beforehand (removing the -r 1 from above), but that was generating way too many frames to deal with since these online meetings can go for hours, so for now, I get one frame per second from the file.

    A Windows based solution would be preferable, however, I’m sure other people would be interested in solutions on other platforms if available.

    Any solution or point in the right direction is much appreciated.

  • FFMPEG - How to Extract Frames As Images While Removing Sequentially Duplicate Frames

    19 octobre 2018, par Michael Nelson

    Is there any way (via script or preferably some parameter in calling ffmpeg that I missed) to extract frames from an avi file and ignore sequentially duplicate frames, thus being able to go through the pictures looking only at the deltas/changes ?

    I frequently have to record meetings at work and a lot of the time, the client screen that I am looking at is not changing while we are talking over the phone. After the meeting is over, I need to use these images as part of our documentation and specifications gathering.

    I know that I could just output every frame and run them through any given duplicate file remover utility, but this would remove ALL duplicate frames. So, if the frames extracted went like this :

    A, A, A, B, B, B, B, C, C, A, A, C, C, C, B, B, B ...

    Running them through a typical duplicate file remover, I would get : A, B, C

    What I would want is : A, B, C, A, C, B

    The command that I am currently using to extract the images is :

    ffmpeg.exe -i file.avi -ss 0 -sameq -f image2 -r 1 images%5d.png

    I was getting every frame beforehand (removing the -r 1 from above), but that was generating way too many frames to deal with since these online meetings can go for hours, so for now, I get one frame per second from the file.

    A Windows based solution would be preferable, however, I’m sure other people would be interested in solutions on other platforms if available.

    Any solution or point in the right direction is much appreciated.

  • matroskadec : partly revert "demux relevant subtitle packets after a seek"

    26 novembre 2016, par Rainer Hochecker
    matroskadec : partly revert "demux relevant subtitle packets after a seek"

    This reverts parts of c16582579b1c6f66a86615c5808cd5b2bf17be73. The hard
    
coded 30 seconds are a lot, and finishing the seek can takes several
    
seconds when the source is on a network share. Remove this code
    
entirely, because it does more bad than good.
    

    (Commit message provided by committer, based on the original messages
    
by the patch author.)
    

    Signed-off-by : Rainer Hochecker <fernetmenta@online.de>
    
Signed-off-by : wm4 <nfxjfg@googlemail.com>
    • [DH] libavformat/matroskadec.c

Navigation