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Autres articles (51)

  • Gestion générale des documents

    13 mai 2011, par

    MédiaSPIP ne modifie jamais le document original mis en ligne.
    Pour chaque document mis en ligne il effectue deux opérations successives : la création d’une version supplémentaire qui peut être facilement consultée en ligne tout en laissant l’original téléchargeable dans le cas où le document original ne peut être lu dans un navigateur Internet ; la récupération des métadonnées du document original pour illustrer textuellement le fichier ;
    Les tableaux ci-dessous expliquent ce que peut faire MédiaSPIP (...)

  • Des sites réalisés avec MediaSPIP

    2 mai 2011, par

    Cette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
    Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page.

  • 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 (...)

Sur d’autres sites (5970)

  • rtmpproto : Validate the embedded flv packet size before copying

    3 octobre 2013, par Martin Storsjö
    rtmpproto : Validate the embedded flv packet size before copying

    This wasn’t an issue prior to 58404738, when the whole RTMP packet
    
was copied at once and the length of the individual embedded flv
    
packets only were validated by the flv demuxer.
    

    Prior to this patch, this could lead to reads and writes out of bound.
    

    Signed-off-by : Martin Storsjö <martin@martin.st>
    • [DBH] libavformat/rtmpproto.c

  • FFMPEG - speed up/slow down video, add jitter etc

    27 septembre 2019, par Darrell

    I’m trying to put together a Windows script that will process short videos in a folder.
    The videos will be shot at a high frame rate 60+ fps and be about 4-5 secs long.

    Basically I am looking to make various style clips, using fast/slow effects, back and forth etc.
    So, the script might process a video, make it start normal speed, then slow motion. Next video might be normal speed, slomo, normal speed slomo. Next video might be forwards,back, forwards back, slomo.

    See example : (this is a compliation, I’m looking at processing individual videos in a folder.)

    http://www.youtube.com/watch?v=K03IBQZu8SQ

    I’m guessing there is no way to do this, other than splitting a clip using FFMPEG, processing the bits, then merging back together ? I can’t seem to find a way to do it as one clip.

  • Merging 2 videos with overlay causes async problems

    3 novembre 2014, par Gnagy

    I’m using following FFMPEG command to merge 2 MKV inputs with the overlay parameter.
    The result should be one output with input1 on top of input2.
    In the process, the output should be webm.
    Both inputs are of the same length (with a margin of a second).

    ffmpeg -i input1.mkv -i input2.mkv -y -filter_complex [0:v]select=1, setpts=PTS-STARTPTS, scale=400:300, pad=400:600 [top]; [1:v]select=1, setpts=PTS-STARTPTS, scale=400:300 [bottom]; [top][bottom] overlay=0:300 [out]; [0:a:0][1:a:0] amerge=inputs=2 [a]; [a] asetpts=PTS-STARTPTS [a] -map [a] -c:v libvpx -crf 10 -b:v 360K -q:v 7 -c:a libvorbis -b:a 32k -map [out] output.webm

    This command does what it’s supposed to do.

    However, the 2 videos are not totally in sync.

    The input1 on the top plays decently while the input2 on the bottom has black frames, slows down or speeds up and causes the audio and video to be out of sync.

    To rule out the individual quality of the inputs, we switched the position of the videos and the top video always plays decently.

    How can we fix this ?

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