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Autres articles (50)

  • 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 (6735)

  • Monitoring ffmpeg two-passes encoding

    31 décembre 2024, par Hodol

    I'm new in FFMPEG.

    


    According to the official guide, https://trac.ffmpeg.org/wiki/Encode/VP9 I use the following command to convert a large h.264 file :

    


    ffmpeg -i input.mp4 -c:v libvpx-vp9 -b:v 0 -crf 30 -pass 1 -an -f null /dev/null
ffmpeg -i input.mp4 -c:v libvpx-vp9 -b:v 0 -crf 30 -pass 2 -c:a libopus output.webm


    


    However, the pass-1 takes too long time and it does not log progress. With -report option I can see something is in progress but I don't know how long I should wait.

    


    Here's questions :

    


      

    1. Is there any way to see the progress of 1-pass ?

      2. 


    2. Is there any way to speed up the process ?

      3. 


    


    Thank you,

    


  • Synchronization Error in Gstreamer/H264 encoding

    21 juin 2020, par Ryan

    Trying to produce a frame synced recording platform w/multiple sensors all capturing at the same fps.

    


    Currently can get up to 8 usb cameras streaming and capturing h264 files. These files are reporting same durations, same number of frames, same frame rate etc. I am experiencing some drift in the videos however.

    


    I assume I am not able to write frames to disk fast enough and this results in the shift. However what I do not understand what is 'masking' this, and why it would report the same nb_frames and durations even though real world time is clearly different. The shift can be relatively minor (5-10 frames over 2 minutes) or more extreme (20-30). But what I am looking for is a multicam frame level sync. So each video can produce the exact same frame and a given timestamp.

    


    I know there are many elements at play here. What I'm looking for first is a better understanding of what my exact problem may be and how I can understand it.

    


  • "fixing" RTL texts from logical to visual, before embedding in video as subtitles with ffmpeg

    13 mai 2024, par Berry Tsakala

    I'm searching for the correct way to pre-process my subtitles files before hard-coding them into video clips.

    


    Currently, ffmpeg does not process RTL (right-to-left) languges properly ; I have detailed the problem here :
https://superuser.com/questions/1679536/how-to-embed-rtl-subtitles-in-a-video-hebrew-arabic-with-the-correct-lan

    


    However, there could be 2 programmatic solutions :

    


      

    1. adding certain unicode control characters can fix (or partially fix) the text, which is then fed into ffmpeg, giving good results.

      2. 


    


      

    • character 0x200F at the end of a hebrew clause, after punctuation

      • 


    • character 0x202B, I haven't yet learned its usage.

      • 


    


      

    1. I can edit the text so that it will produce the correct results on ffmpeg.
But that requires smart BiDi algorithm.

      2. 


    


    Do you know how to preprocess such text ?

    


    (this is NOT an encoding question. It is about RTL/LTR algorithm to use.)

    


    Thank you

    


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