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Autres articles (83)

  • Publier sur MédiaSpip

    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
    Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir

  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP 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 (...)

  • Emballe médias : à quoi cela sert ?

    4 février 2011, par

    Ce plugin vise à gérer des sites de mise en ligne de documents de tous types.
    Il crée des "médias", à savoir : un "média" est un article au sens SPIP créé automatiquement lors du téléversement d’un document qu’il soit audio, vidéo, image ou textuel ; un seul document ne peut être lié à un article dit "média" ;

Sur d’autres sites (8206)

  • Trolls in trouble

    6 juin 2013, par Mans — Law and liberty

    Life as a patent troll is hopefully set to get more difficult. In a memo describing patent trolls as a “drain on the American economy,” the White House this week outlined a number of steps it is taking to stem this evil tide. Chiming in, the Chief Judge of the … Continue reading →

  • Timing breaks concatenating two identical videos after one has ATEMP/SETPTS altered

    25 mai 2019, par user3144514

    Video (B)
    Copy pasted and then doubled speed with Setpts and Atempo as Video (A)

    Concatenating them results in a video with the (A) portion playing at the expected 2x speed, but the (B) portion playing back at 1/2 speed.

    I am simply trying to speed up sections of video that are repetative and merge them back in.

    I have tried doing another round of SETPTS/ATEMPO with 1.0 values, but it doesn’t alter the outcome.

    I have also tried forcibly re-encoding A and B to ensure they match in formats, still no change.

    Speed Change

    ffmpeg -i source.mp4 -filter_complex "[0:v]setpts=0.5*PTS[v];[0:a]atempo=2.0[a]" -map "[v]" -map "[a]" A.mp4

    Concatenation

    ffmpeg -i A.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts x1.ts
    
ffmpeg -i B.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts x2.ts
    
ffmpeg -i "concat:x1.ts|x2.ts" -c copy -bsf:a aac_adtstoasc C.mp4

    Do I need to use some other method to alter the playback rate without changing some internal timing value ?

    Or is there some way to fix the rates after adjusting SETPTS and ATEMPO so that the timing is restored ?

  • combine specific mpeg-dash segments (ex int.mp4 + seg_1.m4s +seg_3.m4s) into one single mp4 file

    16 avril 2019, par Liquid

    I am working one video transcoding in FFmpeg and MP4Box. Currently I am trying to combine/merge/concatenate specific MPEG-DASH video segments(m4s ex:int.mp4, seg_1.m4s, seg2,m4s,sge5.m4s) into one mp4 file.

    This the example of what I am trying to do.

    I have followed this thread ("Combine MPEG-DASH segments (ex, init.mp4 + segments.m4s) back to a full source.mp4 ?") but there is a problem while combining the specific m4s segments, while doing that it frames feazed in after seg2 and in seg5 it played again.

    Reference : FFmpeg example

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