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Autres articles (61)

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • 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" (...)

  • Personnaliser les catégories

    21 juin 2013, par

    Formulaire de création d’une catégorie
    Pour ceux qui connaissent bien SPIP, une catégorie peut être assimilée à une rubrique.
    Dans le cas d’un document de type catégorie, les champs proposés par défaut sont : Texte
    On peut modifier ce formulaire dans la partie :
    Administration > Configuration des masques de formulaire.
    Dans le cas d’un document de type média, les champs non affichés par défaut sont : Descriptif rapide
    Par ailleurs, c’est dans cette partie configuration qu’on peut indiquer le (...)

Sur d’autres sites (10939)

  • How to use AVCodecContext::skip_frame ?

    28 mai 2012, par Denis Loh

    I am developing a Video over IP telephone client which is using ffmpeg libavcodec to decode h.264 video streams. I am facing the issue that audio and video are getting asynch during high network load (due a parallel upload or something similar) or short network interruptions.

    I get the following message by ffmpeg : Increasing reorder buffer to 16.

    This message comes very seldom and when it comes, I get a high delay of approx. 1 second after the appropriate audio. I googled hours and days and only found that the decoding performance is much too low to decode the frames in time. However, the CPU load is not that high and the issue occurs at any frame rate and any frame resolution. Always with the same effect.

    The only thing I believe could solve the problem is to tell the decoder to speed up by dropping some framess.

    Can this be done by using AVCodecContext::skip_frame ? If so, how does it work ? How do I avoid the message above or better how do I react on that ?

    Thank you for your help !

  • Stream Stops Working Using FFMPEG Inside a Node Child_Process Spawn

    14 septembre 2020, par Brad Spencer

    I'm using a video stream on a raspberry pi with raspivid and ffmpeg in a node app. Using them in the terminal (without using node) will stream for hours, but when I use them in a node child_process (I spawn 2, one for each) it works great for a little over 3 minutes and then the stream stops. The child_processes are still running and I'm not seeing any errors.

    


    The gist of my code :

    


    let camera = spawn('raspivid', args)
let ffmpeg = spawn('ffmpeg', args)  

camera.stdout.on('data', (data) => {
  ffmpeg.stdin.write(data)
})


    


    Any ideas why it is stopping after 3 minutes ? Thanks !

    


  • ffmpeg : 1 image + 1 audio = 1 video (how can it encode faster ?)

    11 août 2013, par user1062949

    I want ffmpeg to take a png image and a mp3 audio file as input and generate a video file of the same duration as the audio file. I'm using the following command :

     ffmpeg -loop 1 -shortest -y -i image.png -i audio.mp3 -acodec copy \
    
 -vcodec libx264 video.mov

    However, given a 40min mp3 file (160kbps) as input, it is taking more than 2 hours to encode the whole video on a MacBook Pro i5 2.5GHz.

    I tried to use the -preset ultrafast option, but it is not really improving the encoding speed significantly.

    Is there any way to encode it faster using ffmpeg ?

    I was following the instructions provided in this post : ffmpeg : 1 image + 1 audio file = 1 video

    Any help will be appreciated, thank you.

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