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Autres articles (35)

  • Keeping control of your media in your hands

    13 avril 2011, par

    The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
    While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
    MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
    MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)

  • Les images

    15 mai 2013

  • Taille des images et des logos définissables

    9 février 2011, par

    Dans beaucoup d’endroits du site, logos et images sont redimensionnées pour correspondre aux emplacements définis par les thèmes. L’ensemble des ces tailles pouvant changer d’un thème à un autre peuvent être définies directement dans le thème et éviter ainsi à l’utilisateur de devoir les configurer manuellement après avoir changé l’apparence de son site.
    Ces tailles d’images sont également disponibles dans la configuration spécifique de MediaSPIP Core. La taille maximale du logo du site en pixels, on permet (...)

Sur d’autres sites (2324)

  • Create slideshow video from PNG images - each in its own time position [closed]

    16 août 2023, par Paul

    I have several hundreds of PNG screenshots.

    


    Each screenshot file has following name format : yyyymmdd_hhmmss.png

    


    Time differences between these screenshots are irregular.

    


    How could I automatically create a slideshow video taking the first file as the point zero and maintaining other pictures' exact timings relative to the first one ?

    


    Can FFMPEG do this ? Which contents may have a batch file then ?

    


  • Simultaneous Recording and Real-Time Display Using ffmpeg with DeckLink

    9 décembre 2023, par ark1974

    I am currently working with a DeckLink Duo card, specifically utilizing port 2. My objective is to use FFmpeg to ingest RAW HD SDI, save it as an MP4 file, and concurrently display the incoming SDI video on the computer screen in real-time.

    


    I have experimented with various FFmpeg command lines, combining decklink and sdl options, to achieve this dual functionality :

    


    ffmpeg -f decklink -i 'DeckLink Duo@2' -c:v libx264 -preset ultrafast -tune zerolatency -f sdl "My Screen"


    


    However, I am encountering challenges in achieving both recording and real-time display simultaneously.

    


    I would appreciate any insights, suggestions, or alternative approaches to enable the concurrent recording and display of SDI video using DeckLink with ffmpeg.

    


  • FFMPEG - Getting consistent accurate video time segments

    10 juin 2020, par rossmcm

    I'm processing a large number of videos that need to be time-synchronized to match an audio track (it's a "virtual choir"-type project). I have tried several variations based on the contents of this post, but I get a variability of some seconds on the actual output files. The resulting segment length is variable, and the point in the input video that the output video begins is not at all accurate (I was expecting a +-1 frame error).

    



    Here's my attempt :

    



    :: Syntax:  GetSegment.bat <input file="file" /> <starting time="time" in="in" ms="ms"> <duration in="in" ms="ms">&#xA;:: Example: GetSegment.bat vid.mp4 10000 50000&#xA;::          would produce vid-keyed.mp4 and vid-segment.mp4&#xA;&#xA;@set "_VideoIn=%~1"&#xA;@set "_VideoOutKeyed=%~dpn1-keyed%~x1"&#xA;@set "_VideoOutSegment=%~dpn1-segment%~x1"&#xA;@set "_VideoStartms=%~2"&#xA;@set "_VideoLengthms=%~3"&#xA;@set /a _VideoEndms= %_VideoStartms% &#x2B; %_VideoLengthms%&#xA;ffmpeg -y -i "%_VideoIn%" -force_key_frames %_VideoStartms%ms,%_VideoEndms%ms "%_VideoOutKeyed%"&#xA;ffmpeg -y -ss  %_VideoStartms%ms -i "%_VideoOutKeyed%" -t %_VideoEndms%ms  -codec copy "%_VideoOutSegment%"  &#xA;@exit /b %errorlevel%&#xA;</duration></starting>

    &#xA;

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