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  • 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 (...)

  • De l’upload à la vidéo finale [version standalone]

    31 janvier 2010, par

    Le chemin d’un document audio ou vidéo dans SPIPMotion est divisé en trois étapes distinctes.
    Upload et récupération d’informations de la vidéo source
    Dans un premier temps, il est nécessaire de créer un article SPIP et de lui joindre le document vidéo "source".
    Au moment où ce document est joint à l’article, deux actions supplémentaires au comportement normal sont exécutées : La récupération des informations techniques des flux audio et video du fichier ; La génération d’une vignette : extraction d’une (...)

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  • High Quality Screen Capture with FFmpeg

    27 août 2021, par plumzl

    I'm trying to figure out a command for high quality screen capture on REHL.

    



    I have tried various options, but none really worked. The quality is not good enough. I'm quite new to ffmpeg and doesn't quite understand all the different flags. So any help would be appreciated !

    



    The commands I have tried :

    



    ffmpeg -y -f x11grab -r 30 -s 1920x1080 -i :0.0+0,0 -vcodec libx264 -strict -2 -b:v 16M output.mov


    



    The first command I tried. The weird thing is it doesn't seem to preserve the bitrate specified -b:v 16M. The output video's bitrate is only 2mb/s. Is that not the correct way to specify bitrate when doing screen capture ?

    



    ffmpeg -f x11grab -s 1920x1080 -r 30 -i :0.0 -qscale 0 -vcodec huffyuv output.mov


    



    The huffyuv codec is supposed to be lossless, but the quality doesn't seem to be any better than the libx264 output.

    



    ffmpeg -f x11grab -r 30 -s 1920x1080 -i :0.0+0,0 -vcodec copy -pix_fmt yuv420p -qscale 0 -an output.mkv
ffmpeg -f rawvideo -pix_fmt yuv420p -s:v 1920x1080 -r 30 -i output.mkv -an -c:v libx264 -qscale 0 result.mov 


    



    I'm even trying to capture rawvideo and then convert it to libx264 codec viedeo. But the output is corrupted.

    



    I'm using the version of ffmpeg that's built on April 23rd this year. It doesn't have the preset like -vpre lossless_ultrafast which I see mentioned in a lot posts.

    



    Edit :

    



    After more research, this is the command I end up using. I have to use h264 codec and yuv420p as pixel_fmt since I need to be able to play the quicktimes using quicktime.

    



    ffmpeg -y -f x11grab -framerate 30 -video_size 1920x1080 -i :0.0+0,0 -c:v libx264 -pix_fmt yuv420p -qp 0 -preset ultrafast output.mov


    



    The quality doesn't seem to be much improved even though -qp is set to 0. But it could also because of the rgb conversion to yuv color space according to this post.

    



    https://trac.ffmpeg.org/wiki/Encode/H.264

    


  • High Quality Screen Capture with FFmpeg

    27 août 2021, par plumzl

    I'm trying to figure out a command for high quality screen capture on REHL.

    



    I have tried various options, but none really worked. The quality is not good enough. I'm quite new to ffmpeg and doesn't quite understand all the different flags. So any help would be appreciated !

    



    The commands I have tried :

    



    ffmpeg -y -f x11grab -r 30 -s 1920x1080 -i :0.0+0,0 -vcodec libx264 -strict -2 -b:v 16M output.mov


    



    The first command I tried. The weird thing is it doesn't seem to preserve the bitrate specified -b:v 16M. The output video's bitrate is only 2mb/s. Is that not the correct way to specify bitrate when doing screen capture ?

    



    ffmpeg -f x11grab -s 1920x1080 -r 30 -i :0.0 -qscale 0 -vcodec huffyuv output.mov


    



    The huffyuv codec is supposed to be lossless, but the quality doesn't seem to be any better than the libx264 output.

    



    ffmpeg -f x11grab -r 30 -s 1920x1080 -i :0.0+0,0 -vcodec copy -pix_fmt yuv420p -qscale 0 -an output.mkv
ffmpeg -f rawvideo -pix_fmt yuv420p -s:v 1920x1080 -r 30 -i output.mkv -an -c:v libx264 -qscale 0 result.mov 


    



    I'm even trying to capture rawvideo and then convert it to libx264 codec viedeo. But the output is corrupted.

    



    I'm using the version of ffmpeg that's built on April 23rd this year. It doesn't have the preset like -vpre lossless_ultrafast which I see mentioned in a lot posts.

    



    Edit :

    



    After more research, this is the command I end up using. I have to use h264 codec and yuv420p as pixel_fmt since I need to be able to play the quicktimes using quicktime.

    



    ffmpeg -y -f x11grab -framerate 30 -video_size 1920x1080 -i :0.0+0,0 -c:v libx264 -pix_fmt yuv420p -qp 0 -preset ultrafast output.mov


    



    The quality doesn't seem to be much improved even though -qp is set to 0. But it could also because of the rgb conversion to yuv color space according to this post.

    



    https://trac.ffmpeg.org/wiki/Encode/H.264

    


  • High Quality Screen Capture with FFmpeg

    18 novembre 2015, par plumzl

    I’m trying to figure out a command for high quality screen capture on REHL.

    I have tried various options, but none really worked. The quality is not good enough. I’m quite new to ffmpeg and doesn’t quite understand all the different flags. So any help would be appreciated !

    The commands I have tried :

    ffmpeg -y -f x11grab -r 30 -s 1920x1080 -i :0.0+0,0 -vcodec libx264 -strict -2 -b:v 16M output.mov

    The first command I tried. The weird thing is it doesn’t seem to preserve the bitrate specified -b:v 16M. The output video’s bitrate is only 2mb/s. Is that not the correct way to specify bitrate when doing screen capture ?

    ffmpeg -f x11grab -s 1920x1080 -r 30 -i :0.0 -qscale 0 -vcodec huffyuv output.mov

    The huffyuv codec is supposed to be lossless, but the quality doesn’t seem to be any better than the libx264 output.

    ffmpeg -f x11grab -r 30 -s 1920x1080 -i :0.0+0,0 -vcodec copy -pix_fmt yuv420p -qscale 0 -an output.mkv
    
ffmpeg -f rawvideo -pix_fmt yuv420p -s:v 1920x1080 -r 30 -i output.mkv -an -c:v libx264 -qscale 0 result.mov

    I’m even trying to capture rawvideo and then convert it to libx264 codec viedeo. But the output is corrupted.

    I’m using the version of ffmpeg that’s built on April 23rd this year. It doesn’t have the preset like -vpre lossless_ultrafast which I see mentioned in a lot posts.

    Edit :

    After more research, this is the command I end up using. I have to use h264 codec and yuv420p as pixel_fmt since I need to be able to play the quicktimes using quicktime.

    ffmpeg -y -f x11grab -framerate 30 -video_size 1920x1080 -i :0.0+0,0 -c:v libx264 -pix_fmt yuv420p -qp 0 -preset ultrafast output.mov

    The quality doesn’t seem to be much improved even though -qp is set to 0. But it could also because of the rgb conversion to yuv color space according to this post.

    https://trac.ffmpeg.org/wiki/Encode/H.264

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