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Médias (91)

Autres articles (28)

  • Support de tous types de médias

    10 avril 2011

    Contrairement à beaucoup de logiciels et autres plate-formes modernes de partage de documents, MediaSPIP a l’ambition de gérer un maximum de formats de documents différents qu’ils soient de type : images (png, gif, jpg, bmp et autres...) ; audio (MP3, Ogg, Wav et autres...) ; vidéo (Avi, MP4, Ogv, mpg, mov, wmv et autres...) ; contenu textuel, code ou autres (open office, microsoft office (tableur, présentation), web (html, css), LaTeX, Google Earth) (...)

  • 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 (6264)

  • Insert picture into an mp4 video, probably using ffmpeg

    16 février 2019, par vivanov

    I need to insert an image into a video of mp4 format. The image has smaller dimensions than the video, will appear after the video starts, say, after a minute and a half at certain x, y coordinates of the video frame, will stay on (full opacity) for some time and then will disappear before the video finishes.

    It would also be good if the image "fades in" / "fades out" when appearing / disappearing from the video.

    I would like to do that using the latest ffmpeg 4.1.1, although I am also open in using other opensource programs that run under linux if it would be achieved easier.

    I have the ffmpeg build with --enable-gpl --enable-libx264 --enable-libvpx if this may help.

    Thank you for your help !

  • FFmpeg Concatenate a portion of the files

    26 avril 2015, par Ziad Halabi

    I am using FFmpeg in order to mix wav files on Android. I am able to concatenate wav files by printing them to a list then run the command to concatenate them.

     private void concatenate_wave_files(String path_list, String output_path){
    
        String cmd_notes = "-f concat -i "+path_list+" -y "+output_path;
    
        ffmpegCmd(cmd_notes);
    
    }

    Is it possible to concatenate a portion of the files, for example if I have 2 wav files f1 and f2. And I want to get as a result a concatenation of half of f1 and f2 ?

  • AVSampleBufferDisplayLayer with VTDecompressionSession

    7 juillet 2016, par user1784317

    I’ve been struggling with AVSampleBufferDisplayLayer being really choppy with a lot of motion. When there was motion in my live stream, it would be come pixelated and half frozen with multiple frames displaying at once. However, once I added the following piece of code, everything was solved :

    VTDecodeFrameFlags flags = kVTDecodeFrame_EnableAsynchronousDecompression 
    
| kVTDecodeFrame_EnableTemporalProcessing;
    
VTDecodeInfoFlags flagOut;
    
VTDecompressionSessionDecodeFrame(decompressionSession, sampleBuffer, flags,
    
(void*)CFBridgingRetain(NULL), &flagOut);

    Note that I did create the decompression session before, but I don’t actually do anything in the callback. I am still calling enqueueSampleBuffer : on AVSampleBufferDisplayLayer and that is how the video is displayed on the screen.

    Do you have to call VTDecompressionSessionDecodeFrame for AVSampleBufferDisplayLayer to display correctly ? I thought AVSampleBufferDisplayLayerr would use VTDecompressionSessionDecodeFrame internally. Is this due to being on the iOS Simulator ?

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