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Autres articles (73)

  • 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.

  • 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 (...)

  • Demande de création d’un canal

    12 mars 2010, par

    En fonction de la configuration de la plateforme, l’utilisateur peu avoir à sa disposition deux méthodes différentes de demande de création de canal. La première est au moment de son inscription, la seconde, après son inscription en remplissant un formulaire de demande.
    Les deux manières demandent les mêmes choses fonctionnent à peu près de la même manière, le futur utilisateur doit remplir une série de champ de formulaire permettant tout d’abord aux administrateurs d’avoir des informations quant à (...)

Sur d’autres sites (7774)

  • Muxing two video streams without transcoding with ffpmeg and making vlc overlay them during play

    20 octobre 2016, par Laars Camot

    There is a software that claims it can be done but it’s two expensive for me for a try. Basically it muxes two video streams in one and makes the second transparent video stream overlay on top of the first like it would be a subtitle stream without video filters. The software author states that the resulting output should be playable with all players, including VLC. I’ve tried this :

    ffmpeg -i first.ts -i second.ts -vcodec copy -acodec copy -map 0 -map 1:0 -f mpegts out.ts

    But it simply adds a second video stream to the resulting file. Playing it with VLC makes the player open two separate VLC instances.. no overlay at all. Is there a way to make VLC show two separate videos concurrently in the same window ?

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

    25 janvier 2023, 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.

    


  • Revision 7875602842 : vp9_subtract_test : drop '_t' from local typenames _t is reserved by posix + sw

    17 juillet 2014, par James Zern

    Changed Paths :
     Modify /test/vp9_subtract_test.cc



    vp9_subtract_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 : I636012c74f5de91d594d7398e92343f5efe08327

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