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  • Publier sur MédiaSpip

    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
    Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir

  • MediaSPIP v0.2

    21 juin 2013, par

    MediaSPIP 0.2 is the first MediaSPIP stable release.
    Its official release date is June 21, 2013 and is announced here.
    The zip file provided here only contains the sources of MediaSPIP in its standalone version.
    To get a working installation, you must manually install all-software dependencies on the server.
    If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...)

  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
    The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
    For older browsers the Flowplayer flash fallback is used.
    MediaSPIP allows for media playback on major mobile platforms with the above (...)

Sur d’autres sites (7117)

  • FFMPEG converts HEVC with Alpha mov to PNG sequence not work well

    22 juillet 2023, par topfortune

    I have a mov file with HEVC with Alpha codec on Mac. The mov file has no background color, but have some foreground contents in it. I want to use FFMPEG to grab some PNG pictures from it. Following is the command line I used to grab the first image from the video.

    


    ffmpeg -i hevc-alpha-video.mov -r 1 -pix_fmt rgba -frames:v 1 out.png

    


    I can get the output PNG picture. But it has black background color. What I want is the transparent background PNG picture.

    


    Do you have any idea to handle this ? Thanks.

    


  • ChromaKey FLV Transparency

    1er décembre 2012, par Mr D

    I have over 20000 FLV's at the moment. They currently have no alpha channel and are all CGI generated text on a black background.

    My issue :
    I need to be able to remove the black background and make it transparent, so I can use these videos to layer over pictures in my flash project.

    It needs to be an automated process, that can go through the whole dir of videos and remove the backgrounds

    What I've tried ?

    I have spent the last three days pulling my hair out. Currently the option I see is to write a custom filter for ffmpeg.

    The end goal :

    Layer the flv videos over randomly generated videos in an adobe air application built in flex.

  • How to use ffmpeg make video opacity as 50% ?

    8 septembre 2021, par Xiang Chen

    I had a video, I want to make it opacity low to certain percent.
I use the code below
ffmpeg -i 2.mp4 -vf colorlevels=rimin=0.058:gimin=0.058:bimin=0.058 output.mp4

    


    but is not the effect I want, what I want is like :

    


      

    1. video opacity change to 60%

      2. 


    2. the video see to overlay to dark background

      3. 


    


    Here is the pictures to demonstrate the effect I want :

    


    enter image description here

    


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