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  • Submit bugs and patches

    13 avril 2011

    Unfortunately a software is never perfect.
    If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
    If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
    You may also (...)

  • Les autorisations surchargées par les plugins

    27 avril 2010, par

    Mediaspip core
    autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs

  • 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" (...)

Sur d’autres sites (6832)

  • Revision 9c05172d0a : intrapred_test : drop '_t' from local typenames _t is reserved by posix + switc

    17 juillet 2014, par James Zern

    Changed Paths :
     Modify /test/intrapred_test.cc



    intrapred_test : drop ’_t’ from local typenames

    _t is reserved by posix

    + switch to camelcase
    http://google-styleguide.googlecode.com/svn/trunk/cppguide.xml#Type_Names

    Change-Id : I74d7489ea35f988fcfec3651bd16f02e688e406a

  • FFMPEG : Overlaying one video on another one, and making black pixels transparent

    26 juillet 2016, par Michael A

    I’m trying to use FFMPEG to create a video with one video overlayed on top another.

    I have 2 MP4s. I need to make all BLACK pixels in the overlay video transparent so that I can see the main video underneath it.

    I found two ways to overlay one video on another :

    First, the following positions the overlay in the center, and therefore, hides that portion of the main video beneath it :

        ffmpeg -i 1.mp4 -vf "movie=2.mp4 [a]; [in][a] overlay=352:0 [b]" combined.mp4 -y

    And, this one, places the overlay video on the left, but it’s opacity is set to 50% so at least other one beneath it is visible :

    ffmpeg -i 1.mp4 -i 2.mp4 -filter_complex "[0:v]setpts=PTS-STARTPTS[top]; [1:v]setpts=PTS-STARTPTS, format=yuva420p,colorchannelmixer=aa=0.5[bottom]; [top][bottom]overlay=shortest=0" -acodec libvo_aacenc -vcodec libx264 out.mp4 -y

    My goal is simply to make all black pixels in the overlay (2.mp4) completely transparent. How can this be done.

  • I Need Help Making Our FIRST Robotics Competition Driver Station Video Feed Faster [closed]

    30 mars, par Joshua Green

    I am currently using FFmpeg on a Raspberry Pi 4 Model B using an ArduCam UC-844 Rev. B as the camera. We do not need any audio and I don't care about the quality of the video. All we need is for the stream to be as fast as possible. The video from the camera is being streamed to the driver station via FFmpeg and being picked up on the driver station via FFplay. Right now we are getting a delay that we wish could go away or be significantly shortened. These are the commands we are using.

    


      


    • Raspberry Pi : ffmpeg -i /dev/video0 -c:v libx264 -crf 45 -maxrate 1M -bufsize 1.2M -preset ultrafast -tune zerolatency -filter:v fps=30 -f mpegts -omit_video_pes_length 0 udp://10.2.33.5:554

      


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    • Driver Station : ffplay -fflags nobuffer -flags low_delay -probesize 32 -analyzeduration 0 -f mpegts -vf setpts=0 udp://10.2.33.5:554

      


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