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    1er décembre 2010, par

    La gestion de la ferme passe par l’exécution à intervalle régulier de plusieurs tâches répétitives dites Cron.
    Le super Cron (gestion_mutu_super_cron)
    Cette tâche, planifiée chaque minute, a pour simple effet d’appeler le Cron de l’ensemble des instances de la mutualisation régulièrement. Couplée avec un Cron système sur le site central de la mutualisation, cela permet de simplement générer des visites régulières sur les différents sites et éviter que les tâches des sites peu visités soient trop (...)

  • ANNEXE : Les plugins utilisés spécifiquement pour la ferme

    5 mars 2010, par

    Le site central/maître de la ferme a besoin d’utiliser plusieurs plugins supplémentaires vis à vis des canaux pour son bon fonctionnement. le plugin Gestion de la mutualisation ; le plugin inscription3 pour gérer les inscriptions et les demandes de création d’instance de mutualisation dès l’inscription des utilisateurs ; le plugin verifier qui fournit une API de vérification des champs (utilisé par inscription3) ; le plugin champs extras v2 nécessité par inscription3 (...)

  • Selection of projects using MediaSPIP

    2 mai 2011, par

    The examples below are representative elements of MediaSPIP specific uses for specific projects.
    MediaSPIP farm @ Infini
    The non profit organizationInfini develops hospitality activities, internet access point, training, realizing innovative projects in the field of information and communication technologies and Communication, and hosting of websites. It plays a unique and prominent role in the Brest (France) area, at the national level, among the half-dozen such association. Its members (...)

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  • How to grab individual frames from streaming video with VLC.DotNet and pass them to OpenCV

    12 février 2018, par user2219675

    I have a RTP video stream (MPEG TS & H264) that does not display well when opened with OpenCV ffmpeg. The video is not decoded well and contains artifacts while it is displayed correctly in VLC. So I thought to grab the video frames with VLC library (VLC DotNet) convert them to Mat and pass them to OpenCV.

    I couldn’t find any similar solutions. The only solution that seems non optimal is to transcode the stream in VLC to MJPEG stream and them open it in OpenCV.

    Does anyone have a better idea ?

  • fftools/ffmpeg_enc : apply -top to individual encoded frames

    14 septembre 2023, par Anton Khirnov
    fftools/ffmpeg_enc : apply -top to individual encoded frames

    Fixes #9339.
    • [DH] fftools/ffmpeg_enc.c
    • [DH] tests/ref/fate/concat-demuxer-extended-lavf-mxf_d10
    • [DH] tests/ref/fate/concat-demuxer-simple1-lavf-mxf_d10
    • [DH] tests/ref/lavf/mxf_d10

  • How to set individual image display durations with ffmpeg-python

    20 septembre 2022, par tompi

    I am using ffmpeg-python 0.2.0 with Python 3.10.0. Displaying videos in VLC 3.0.17.4.

    


    I am making an animation from a set of images. Each image is displayed for different amount of time.

    


    I have the basics in place with inputting images and concatenating streams, but I can't figure out how to correctly set frame duration.

    


    Consider the following example :

    


    stream1 = ffmpeg.input(image1_file)
stream2 = ffmpeg.input(image2_file)
combined_streams = ffmpeg.concat(stream1, stream2)
output_stream = ffmpeg.output(combined_streams, output_file)
ffmpeg.run(output_stream)


    


    With this I get a video with duration of a split second that barely shows an image before ending. Which is to be expected with two individual frames.

    


    For this example, my goal is to have a video of 5 seconds total duration, showing the image in stream1 for 2 seconds and the image in stream2 for 3 seconds.

    


    Attempt 1 : Setting t for inputs

    


    stream1 = ffmpeg.input(image1_file, t=2)
stream2 = ffmpeg.input(image2_file, t=3)
combined_streams = ffmpeg.concat(stream1, stream2)
output_stream = ffmpeg.output(combined_streams, output_file)
ffmpeg.run(output_stream)


    


    With this, I get a video with the duration of a split second and no image displayed.

    


    Attempt 2 : Setting frames for inputs

    


    stream1 = ffmpeg.input(image1_file, frames=48)
stream2 = ffmpeg.input(image2_file, frames=72)
combined_streams = ffmpeg.concat(stream1, stream2)
output_stream = ffmpeg.output(combined_streams, output_file, r=24)
ffmpeg.run(output_stream)


    


    In this case, I get the following error from ffmpeg :

    


    Option frames (set the number of frames to output) cannot be applied to input url ########## -- you are trying to apply an input option to an output file or vice versa. Move this option before the file it belongs to.


    


    I can't tell if this is a bug in ffmpeg-python or if I did it wrong.

    


    Attempt 3 : Setting framerate for inputs

    


    stream1 = ffmpeg.input(image1_file, framerate=1/2)
stream2 = ffmpeg.input(image2_file, framerate=1/3)
combined_streams = ffmpeg.concat(stream1, stream2)
output_stream = ffmpeg.output(combined_streams, output_file)
ffmpeg.run(output_stream)


    


    With this, I get a video with the duration of a split second and no image displayed. However, when I set both framerate values to 1/2, I get an animation of 4 seconds duration that displays the first image for two seconds and the second image for two seconds. This is the closest I got to a functional solution, but it is not quite there.

    


    I am aware that multiple images can be globbed by input, but that would apply the same duration setting to all images, and my images each have different durations, so I am looking for a different solution.

    


    Any ideas for how to get ffmpeg-python to do the thing is much appreciated.

    


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