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  • La file d’attente de SPIPmotion

    28 novembre 2010, par

    Une file d’attente stockée dans la base de donnée
    Lors de son installation, SPIPmotion crée une nouvelle table dans la base de donnée intitulée spip_spipmotion_attentes.
    Cette nouvelle table est constituée des champs suivants : id_spipmotion_attente, l’identifiant numérique unique de la tâche à traiter ; id_document, l’identifiant numérique du document original à encoder ; id_objet l’identifiant unique de l’objet auquel le document encodé devra être attaché automatiquement ; objet, le type d’objet auquel (...)

  • 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 (...)

  • 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 (...)

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  • How to use ffmpeg to encode isolated motion vectors (using codecview)

    22 juillet 2021, par Temmeh

    I have been successfully using this command to superimpose MPEG motion vectors onto a video :

    


    ffmpeg -v error -flags2 +export_mvs -i input.mp4 -vf codecview=mv=pf+bf+bb -y output.mp4

    


    Now I would like to be able to export an h264 mp4 of just the motion vector arrows, like in this example, without the original video layered underneath. I checked the codecview documentation and and did not find a flag or option to do this.

    


    Any help is appreciated !

    


  • FFmpeg metadata tags for YouTube 3D side-by-side movies

    17 février 2021, par Some1Else

    YouTube requires specific metadata tags for 3D Side-By-Side format movies. If the tag is not there then YouTube does not give the anaglyph playback options for the end user.

    



    Their "help" is here
https://support.google.com/youtube/answer/7278886?hl=en-GB

    



    I am trying to get FFmpeg to add the MP4 tag when building my movie.

    



    Code that works now for a series of PNG files into a MP4.

    



    "ffmpeg.exe" -framerate 60 -i "VID%05d.PNG" -c:v libx264 -preset:v veryslow -profile:v high -crf 15 -s 1280x720 -pix_fmt yuvj420p -an -y "OUTPUT.MP4"


    



    But when I add the tag from the YouTube help page

    



    "ffmpeg.exe" -framerate 60 -i "VID%05d.PNG" -c:v libx264 -preset:v veryslow -profile:v high -crf 15 -s 1280x720 -pix_fmt yuvj420p -an -y -x264opts "frame-packing=3:frame-packing-interpret=1:frame-packing-quincunx=0:frame-packing-grid=0,0,0,0" "OUTPUT.MP4"


    



    I get this error from FFmpeg

    



    [libx264 @ 0000000002a8c3a0] bad option 'frame-packing-interpret': '1'


    



    This page (ignore the proselytising)

    



    http://www.pantherdynamics.yolasite.com/panther-dynamics-blog/uploading-3dsbs-content-to-youtube

    



    says you only need to use this tag

    



    -x264opts frame-packing=3


    



    Using that does make FFmpeg finish correctly, but the SBS is still ignored by YouTube

    



    The YouTube engineer blog post here

    



    https://youtube-eng.googleblog.com/2011/09/getting-3d-content-on-youtube_8.html

    



    links to an older supposed 3D movie that also does not give 3D options any more.

    



    https://www.youtube.com/watch?v=ubRHSg5daMs

    



    So maybe even YouTube's own 3D movies are crippled ?

    



    What am I doing wrong ? Any FFmpeg gurus able to help ?

    


  • changing frame-rate for .mov

    5 juin 2013, par Ryan Saxe

    So I have a script in python that uses urllib to download a bunch of images and I then use ImageMagick to add labels to the images and then throw them into a MOV file.

    My issue is that the MOV file is going at 30 frames per second, and that is way too fast for me to be able to watch what is happening. I need something that is more like 5-10 frames per second.

    Is there a way to do this in ImageMagick, FFmpeg or any other easily accessible and cross platform package ?

    EDIT 1 : showing my ImageMagick

    convert -quality 100 *.png my_movie.mov

    I wasn't able to find it, but is there some line I add like -frameRate or something like that to allow me to choose the frame rate ? I can also use FFmpeg along with it so if anybody knows, that would be greay

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