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Autres articles (64)

  • 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

  • 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

  • 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 (9578)

  • ffpmeg vs ffprobe performance

    5 octobre 2023, par Thomas

    I wanted to try extracting frames at scene changes with ffmpeg, vs. getting the frame numbers with ffprobe and extracting them later.

    



    But I had a surprise : ffprobe seems to be much slower than ffmpeg, while ffmpeg is taking the frames, resizing and saving them as well.

    



    ffmpeg command line :

    



    ffmpeg -hide_banner -y -i d:/test/m/long.mkv -vf "select=gt(scene\,0.4), showinfo, scale=320:-1, tile=12x200" -vsync 0 thumbnails%03d.png


    



    this takes : 488 seconds

    



    ffprobe command line :

    



    ffprobe -show_frames -of compact=p=0 -f lavfi "movie=/test/m/long.mkv,select=gt(scene\,.4)"


    



    this takes : 899 seconds

    



    I am missing something ?

    


  • ffpmeg vs ffprobe performance

    13 décembre 2016, par Thomas

    I wanted to try extracting frames at scene changes with ffmpeg, vs. getting the frame numbers with ffprobe and extracting them later.

    But I had a surprise : ffprobe seems to be much slower than ffmpeg, while ffmpeg is taking the frames, resizing and saving them as well.

    ffmpeg command line :

    ffmpeg -hide_banner -y -i d:/test/m/long.mkv -vf "select=gt(scene\,0.4), showinfo, scale=320:-1, tile=12x200" -vsync 0 thumbnails%03d.png

    this takes : 488 seconds

    ffprobe command line :

    ffprobe -show_frames -of compact=p=0 -f lavfi "movie=/test/m/long.mkv,select=gt(scene\,.4)"

    this takes : 899 seconds

    I am missing something ?

  • FFMPEG, How to concat mp4 files with different fps to create final video with different fps

    9 octobre 2019, par Newbie Engineer

    I am using following commands

    images to video

    ffmpeg.exe -r 5 -f image2 -s 960x720 -i D :/images%2d.PNG -vcodec libx264 -crf 25 -pix_fmt yuv420p D :/tester.mp4

    I created several mp4 with different fps(5, 10, 15, 20...), and created a list of mp4 files name with different FPS, then tried to concat using

    ffmpeg -f concat -i D :/mylist.txt -c copy final.mp4

    But this is not concatenating properly, last couple of mp4 files are not being joined properly and there is always two or three seconds gap between each joined mp4 files. Wondering if any one has dealt with this issue. I want to keep the FPS of each single mp4 files as it is, trying to get smooth final video with progressing fps like 5, 10, 15, 20.. FPS).

    FFMPEG version 4.2.1, (no audio involved)

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