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Autres articles (33)

  • Les autorisations surchargées par les plugins

    27 avril 2010, par

    Mediaspip core
    autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs

  • 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 (...)

  • Support audio et vidéo HTML5

    10 avril 2011

    MediaSPIP utilise les balises HTML5 video et audio pour la lecture de documents multimedia en profitant des dernières innovations du W3C supportées par les navigateurs modernes.
    Pour les navigateurs plus anciens, le lecteur flash Flowplayer est utilisé.
    Le lecteur HTML5 utilisé a été spécifiquement créé pour MediaSPIP : il est complètement modifiable graphiquement pour correspondre à un thème choisi.
    Ces technologies permettent de distribuer vidéo et son à la fois sur des ordinateurs conventionnels (...)

Sur d’autres sites (5571)

  • Merge two video devices into a third device by placing the video next to each other

    14 janvier 2021, par Lennart Van der Goten

    The Situation

    


    I have two webcams (with associated video devices /dev/video0 and /dev/video1). The first webcam generates a resolution of 720p while the other one generates 1080p.

    


    The Task

    


    I would like to create a new video device /dev/video2 that is defined by putting the video from the first webcame next to the one coming from the second webcam.

    


  • Creating a transparent video out of an input video

    28 juillet 2021, par poldown

    I'm trying to create a video with a transparent background out of an input video (with the same dimensions, etc.). I tried several strategies (using the chromakey filter and others) and none worked... I got this far :

    


    ffmpeg -i input.mp4 -filter_complex "color=color=black@0.0,format=yuva420p[bg],[bg][0:v]scale2ref[bg][0v],[bg]drawbox=x=10:y=10:w=100:h=100:color=pink@0.5;[0v]nullsink" -c:v qtrle -an "alpha.mov"


    


      

    • creating a video stream with transparency, and setting a transparent background (black@0.0)

      • 


    • scaling the transparent video according to the input video

      • 


    • [for testing purposes : drawing a box over the transparent video. I omitted the part in which I embed subtitles onto the video, for simplicity's sake]

      • 


    • discarding the input video stream

      • 


    • removing the audio stream

      • 


    


    It basically works, but the processing never ends - I can't manage to limit the output video length so it'll match the input video's length...
I've tried using the -shortest option anywhere in the command - with no success.

    


  • Give a video rounded transparent edges so that it can be overlayed on another video using FFMPEG

    15 octobre 2020, par Kevin Jasti

    Im trying to overlay a smaller video (200x200)on top of a bigger video (800x800).

    



    I've used the FFMPEG overlay filter to achieve this

    



        ffmpeg -i big.mp4 -vf "movie=small.mkv[clip2]; [in][clip2] overlay=1:5 [out]"  final.mp4


    



    Challenge is that the smaller video needs its edges to be rounded.
I have tried working with alphaextract and alphamerge. The documentation on FFMPEG is sparse and im not sure how to go about it.

    


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