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Other articles (105)

  • Websites made ​​with MediaSPIP

    2 May 2011, by

    This page lists some websites based on MediaSPIP.

  • Ajouter des informations spécifiques aux utilisateurs et autres modifications de comportement liées aux auteurs

    12 April 2011, by

    La manière la plus simple d’ajouter des informations aux auteurs est d’installer le plugin Inscription3. Il permet également de modifier certains comportements liés aux utilisateurs (référez-vous à sa documentation pour plus d’informations).
    Il est également possible d’ajouter des champs aux auteurs en installant les plugins champs extras 2 et Interface pour champs extras.

  • Possibilité de déploiement en ferme

    12 April 2011, by

    MediaSPIP peut être installé comme une ferme, avec un seul "noyau" hébergé sur un serveur dédié et utilisé par une multitude de sites différents.
    Cela permet, par exemple : de pouvoir partager les frais de mise en œuvre entre plusieurs projets / individus; de pouvoir déployer rapidement une multitude de sites uniques; d’éviter d’avoir à mettre l’ensemble des créations dans un fourre-tout numérique comme c’est le cas pour les grandes plate-formes tout public disséminées sur le (...)

On other websites (11421)

  • ffmpeg h.264 video plays in Safari but not in Chrome

    6 March 2016, by ensnare

    I’m using ffmpeg to encode a .MOV raw video into a compressed H.264 video for display on an html5 website. I’m using the below string to encode the video:

    ffmpeg -y \
    
-i in.mov
    
-b 3500k -bt 4000k \
    
-acodec libfaac -ac 2 -ar 48000 -ab 192k \
    
-vcodec libx264 -vpre ultrafast -vpre baseline \
    
out.mp4

    The resulting video looks great and plays fine in Safari, but Chrome can’t recognize it. Any ideas?

    Thanks.

  • Node.js asynchronous video conversion slow

    9 December 2016, by lukstei

    I wrote a little website/service, which can download a video from a website (currently Youtube) and converts it on the fly to an mp3 file and sends this file back as the response.

    For example, you when you request http://localhost:8000/v=http://www.youtube.com/watch?v=HhoewflkQu0, then it will download this video and response the audio layer encoded in MP3.

    This all works very well, my problem is that this is very slow and I can’t figure out why.

    Simplified the script behaves like this:

    Download the video and write it to the stdin of ffmpeg, and the stdout goes to the response.
    Video (MP4, FLV) -> FFMPEG -> MP3

    I used curl to figure out how fast the script is:

    $ curl http://localhost:8000/v=http://www.youtube.com/watch?v=HhoewflkQu0

    I get only about 5-10k.

    So why is this so slow?

    1. The server, from which I am downloading the video is slow.
    2. The conversion is slow (because of a slow CPU).
    3. The data transfer between node.js -> FFMPEG is slow.

    I tried to download the video in a normal download manager, and i got about 320k, which is my normal download speed, so the first point isn’t the bottleneck.

    To point 2 and 3, I tried to write a local file to the stdin, and I got about 600k so that isn’t it either.

    So why is my script so slow, and what can I do to make it faster?

    https://gist.github.com/1304637

    Thanks in advance.

  • encoding a video for looping?

    24 January 2013, by bennettk

    This is somewhat related to Looping a video with AVFoundation AVPlayer but that question is answered. What I'm trying to achieve is seamless looping using an AVPlayer. There is a noticeable stutter between loops using h264-encoded videos* that has gotten worse for some reason with the update to iOS 5. Could this have something to do with the way the videos are encoded rather than the AVPlayer? The looping is triggered by a playerItemDidReachEnd notification as described in the link above.

    Thanks.

    * here's the ffmpeg command we're using to encode the videos, if that helps:

    ffmpeg -i -y -sameq -vcodec libx264 -vpre hq -crf 20 -an

    (yes, the files don't have sound (yet) so the -an is intentional.)

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