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Autres articles (21)

  • 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" (...)

  • 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 (6562)

  • How can I convince ffserver to save a locally-sourced webcam stream to a file in high resolution AND stream it in lower resolution ?

    2 novembre 2015, par Dominic Jacobssen

    We have a remote Linux machine, accessible over VPN, which has a USB webcam. We want to use this for video conferencing, but we also want to store the stream for archiving.

    Since the streaming bandwidth is limited, it makes sense to capture the stream on the same machine as the webcam and rsync that across after-the-fact, rather than trying to capture the streamed content, which is necessarily going to be poor quality.

    We’re trying to use ffmpeg and ffserver to achieve this, but with little success. Most of the articles on the internet either deal with just streaming a webcam, or rebroadcasting a remote stream. We found we had to recompile ffserver because of a missing "my_addr->sin_family = AF_INET ;" in the version of ffserver.c we had been using, since fixed in git.

    Here’s the ffserver.conf we’re trying to use :

    Port 43688
    
BindAddress 127.0.0.1
    
MaxHTTPConnections 2000
    
MaxClients 1000
    
MaxBandwidth 1000
    
CustomLog -
    
NoDaemon
    
<feed>
    
ReadOnlyFile /tmp/feed.ffm
    
FileMaxSize 20M
    
ACL allow 127.0.0.1
    
</feed>
    
<stream>
    
Feed feed.ffm
    
Format mp4
    
VideoSize qvga
    
VideoGopSize 12
    
VideoHighQuality
    
Video4MotionVector
    
VideoCodec libx264
    
VideoBitRate 100
    
VideoBufferSize 40
    
VideoFrameRate 5
    
VideoQMin 3
    
VideoQMax 31
    
AudioCodec libfaac
    
AudioBitRate 32
    
AudioChannels 2
    
AudioSampleRate 22050
    
ACL allow localhost
    
</stream>

    When we fire this up, we get the error :

    Unable to create feed file '/tmp/feed.ffm' as it is marked readonly

    Fair enough, but this is not what is implied in the docs. Changing the directive to :

    File /tmp/feed.ffm

    allows ffserver to fire up and appear to sit and wait for ffmpeg to connect to it. However, when we fire up ffmpeg with the command :

    ffmpeg -f alsa -i pulse -r 16000 -f video4linux2 -s qvga -i /dev/video0 -r 5 -f mp4 -vcodec libx264 -sameq -acodec libfaac -ab 32k http://127.0.0.1:43688/feed.ffm

    then the webcam lights up and ffserver acknowledges the connection with the messages :

    New connection: POST /feed.ffm
    
[POST] "/feed.ffm HTTP/1.1" 200 0

    but after a few seconds we get the errors :

    [mp4 @ 0x264b160] muxer does not support non seekable output
    
Could not write header for output file #0 (incorrect codec parameters ?)

    We’ve tried various other formats (mpeg, mpegts, avi) and codecs (mpeg1video, mpeg2video, mpeg4), all without success.

    Moreover, we were under the impression that ffserver could reencode input format to a lower resolution for streaming, but if the stream resolution doesn’t match the feed resolution, we get an error about the resolutions not matching.

    Has anyone ever managed to get this working correctly ? I’ve read about vlc being able to do something like this, but the vlc command lines are well nigh impenetrable.

    Thanks !

    Dominic

  • nutenc : choose for non audio streams a timebase with finer resolution.

    1er octobre 2012, par Michael Niedermayer

    nutenc : choose for non audio streams a timebase with finer resolution.

  • using FFMPEG commands , can i get the default values of any media file, like resolution, audio codec, video codec..etc

    30 novembre 2012, par rohit k.

    like for eg.
    if i enter the output extension '.avi' , i should get the default audio codec used , default video codec used , etc... Is there a command for this ?

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