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Autres articles (40)

  • 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.

  • Emballe médias : à quoi cela sert ?

    4 février 2011, par

    Ce plugin vise à gérer des sites de mise en ligne de documents de tous types.
    Il crée des "médias", à savoir : un "média" est un article au sens SPIP créé automatiquement lors du téléversement d’un document qu’il soit audio, vidéo, image ou textuel ; un seul document ne peut être lié à un article dit "média" ;

  • Other interesting software

    13 avril 2011, par

    We don’t claim to be the only ones doing what we do ... and especially not to assert claims to be the best either ... What we do, we just try to do it well and getting better ...
    The following list represents softwares that tend to be more or less as MediaSPIP or that MediaSPIP tries more or less to do the same, whatever ...
    We don’t know them, we didn’t try them, but you can take a peek.
    Videopress
    Website : http://videopress.com/
    License : GNU/GPL v2
    Source code : (...)

Sur d’autres sites (5093)

  • Node.js asynchronous video conversion slow

    9 décembre 2016, par 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 janvier 2013, par 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.)

  • how to improve the quality of resultant video when merging audio-video with ffmpeg ?

    6 novembre 2015, par R.S

    When merging an audio and video with ffmpeg, the quality of the resultant video goes down. How to we improve the quality(esp. the audio quality) ?

    The audio quality gets degraded to quite an extent with random screeches in between.
    I’ve tried converting the audio to mp3 and video to mp4 before merging them, tried various audio-video parameters like bitrate, sample-rate, qscale etc but still unsuccessful.
    Any help would be greatly appreciated !

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