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  • Submit enhancements and plugins

    13 avril 2011

    If you have developed a new extension to add one or more useful features to MediaSPIP, let us know and its integration into the core MedisSPIP functionality will be considered.
    You can use the development discussion list to request for help with creating a plugin. As MediaSPIP is based on SPIP - or you can use the SPIP discussion list SPIP-Zone.

  • Utilisation et configuration du script

    19 janvier 2011, par

    Informations spécifiques à la distribution Debian
    Si vous utilisez cette distribution, vous devrez activer les dépôts "debian-multimedia" comme expliqué ici :
    Depuis la version 0.3.1 du script, le dépôt peut être automatiquement activé à la suite d’une question.
    Récupération du script
    Le script d’installation peut être récupéré de deux manières différentes.
    Via svn en utilisant la commande pour récupérer le code source à jour :
    svn co (...)

  • Creating farms of unique websites

    13 avril 2011, par

    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
    This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...)

Sur d’autres sites (12419)

  • play a .sdp file describing a UDP/RTP H264 stream iOS 8+

    26 avril 2017, par Alex

    I´m looking into how to implement a simple app that can play a .sdp file (like VLC can do) in order to open a RTP stream made by GStreamer :

    gst-launch-1.0 rpicamsrc bitrate=10000000 ! video/x-h264,width=1280,height=720,framerate=30/1  ! h264parse config-interval=1 ! rtph264pay ! udpsink host=192.168.100.123 port=1234

    What would be the easiest way to do this in Swift/Objecvtive-C ? Are there any built in functions or libraries I should know of ?

  • How to play a specific number of samples from an audio file using ffmpeg ?

    2 juillet 2023, par FrostDream

    I'm trying to use ffmpeg in a command-line or terminal environment to play only a specific number of samples from an audio file. Instead of playing the entire audio, I want to extract and play a precise portion based on the sample count.

    


    I came across the following example command that seems to be relevant :

    


    ffmpeg -ss 0 -t [SAMPLE_COUNT] -i [INPUT_AUDIO_FILE] -f wav - | ffplay -


    


    In the command, I understand that -ss is used to specify the start time as 0, -t sets the duration as the sample count, -i defines the input audio file, and -f sets the output format as WAV. The output is then piped to ffplay, a simple media player provided with ffmpeg, which will play the specified number of samples from the audio file.

    


    However, I'm not entirely sure about the usage and options of ffmpeg in this scenario. Could someone please provide a detailed explanation of how to correctly use ffmpeg to achieve this ? Any additional insights, tips, or alternative approaches would also be greatly appreciated. Thank you !

    


  • Encoded mp4 video won't play in Firefox v33

    3 novembre 2014, par Michael Heuberger

    When this video is encoded with the following ffmpeg command, it cannot be played in Firefox v33 (a blank screen appears). But when I play it in the native VLC player, it works. So here the long ffmpeg command :

    $ ffmpeg -r 15 -f image2 -i /home/(...)/frames/%d.jpg -i
    
  /home/(...)/preview.wav -y -acodec libfdk_aac -b:a 128k 
    
  -vcodec libx264 -b:v 386k -preset ultrafast -profile:v baseline 
    
  -crf 6 -pix_fmt yuv420p -loglevel warning -movflags faststart 
    
  /home/(...)/preview.mp4

    As you can see, preview.mp4 is encoded by a sequence of jpg images with a given wav file.

    The ffmpeg output is just this

    [wav @ 0x35ff460] Estimating duration from bitrate, this may be inaccurate
    
Guessed Channel Layout for  Input Stream #1.0 : mono
    
[swscaler @ 0x35f0d80] deprecated pixel format used, make sure you did set range correctly

    Any clues why it won’t play on Firefox (and what the other ffpmeg warnings mean) ?

    Thanks !!!

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