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Autres articles (83)

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    This page lists some websites based on MediaSPIP.

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    Certains thèmes prennent en compte trois éléments de personnalisation : l’ajout d’un logo ; l’ajout d’une bannière l’ajout d’une image de fond ;

  • 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.
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  • With ffmpeg's image to movie feature, is it possible to pass in frames over a period of time versus all at once ?

    2 novembre 2013, par Zack Yoshyaro

    For the purpose of making a time lapse recording of desktop activity, it is possible so "stream" the frame list to ffmpeg over time, rather than all at once in the beginning.

    Currently, it is a two step process.

    1. save individual snapshots to disc

      im = ImageGrab.grab()
      im.save("frame_%s.jpg" % count, 'jpg')

    2. compile those snapshots with ffmpeg via

      ffmpeg -r 1 -pattern_type glob -i '*.jpg' -c:v libx264 out.mp4

    It would be nice if there were a way to merge the two steps so that I'm not flooding my hard drive with thousands of individual snapshots. Is it possible to do this ?

  • How to show segment lengths of hls file with ffmpeg

    30 mai 2017, par endorphins

    I’m trying to use ffmpeg to retrieve the segment duration of every segment for every stream of an HLS file. It looks like I can do this if I know all of the names of the individual files in advance and call ffprobe on each one. This seems really tedious and I won’t always know the names of all of the individual files, only the main .m3u8. Is there any way I can get all of this information with just one ffmpeg command ?

    Additionally, is the duration retrieved by ffprobe on a .aac file accurate ? I get the message that it’s "Estimating duration from bitrate, this may be inaccurate".

  • How To Specify FFMPEG Input Volume For Multple Input Files

    30 septembre 2014, par gbd

    I have 6 similar/separate audio input files feeding into ffmpeg - no video. I’m mixing the 6 input channels down to a stereo output using amix and that works fine. But now I need to change the volume of each individual input channel before the mix down - or maybe as part of the mix down. I’ve looked at and tried aeval (which seems very slow) in the form

     'aeval=val(0)*volChg1:c=same|val(1)*volChg2:c=same|val(2)*volChg3:c=same|val(3)*volChg4:c=same|val(4)*volChg5:c=same|val(5)*volChg6:c=same'

    but that only seems to change the volume of the first channel.

    So the whole input part of my ffmpeg expression looks something like this right now :

    -i inFilePath1 -i inFilePath2 -i inFilePath3 -i inFilePath4 -i inFilePath5 -i inFilePath6 
    
-filter_complex 'aeval=val(0)*$volChg1:c=same|val(1)*$volChg2:c=same|val(2)*$volChg3:c=same|val(3)*$volChg4:c=same|val(4)*$volChg5:c=same|val(5)*$volChg6:c=same','amix=inputs=6:duration=longest'

    $volChg1-6 are php variables containing the individual volume multipliers - 0.5 for example should halve the volume of that individual channel while 1.0 would leave it unaffected. How do I do this ?

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