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  • 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 (...)

  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

  • 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 (...)

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  • 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>

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  • 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.

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

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    ffmpeg -f decklink -i &#x27;DeckLink Duo@2&#x27; -c:v libx264 -preset ultrafast -tune zerolatency -f sdl "My Screen"&#xA;

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

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

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  • 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.

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    Each screenshot file has following name format : yyyymmdd_hhmmss.png

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    Time differences between these screenshots are irregular.

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    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 ?

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

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