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  • Personnaliser les catégories

    21 juin 2013, par

    Formulaire de création d’une catégorie
    Pour ceux qui connaissent bien SPIP, une catégorie peut être assimilée à une rubrique.
    Dans le cas d’un document de type catégorie, les champs proposés par défaut sont : Texte
    On peut modifier ce formulaire dans la partie :
    Administration > Configuration des masques de formulaire.
    Dans le cas d’un document de type média, les champs non affichés par défaut sont : Descriptif rapide
    Par ailleurs, c’est dans cette partie configuration qu’on peut indiquer le (...)

  • List of compatible distributions

    26 avril 2011, par

    The table below is the list of Linux distributions compatible with the automated installation script of MediaSPIP. Distribution nameVersion nameVersion number Debian Squeeze 6.x.x Debian Weezy 7.x.x Debian Jessie 8.x.x Ubuntu The Precise Pangolin 12.04 LTS Ubuntu The Trusty Tahr 14.04
    If you want to help us improve this list, you can provide us access to a machine whose distribution is not mentioned above or send the necessary fixes to add (...)

  • Automated installation script of MediaSPIP

    25 avril 2011, par

    To overcome the difficulties mainly due to the installation of server side software dependencies, an "all-in-one" installation script written in bash was created to facilitate this step on a server with a compatible Linux distribution.
    You must have access to your server via SSH and a root account to use it, which will install the dependencies. Contact your provider if you do not have that.
    The documentation of the use of this installation script is available here.
    The code of this (...)

Sur d’autres sites (7516)

  • 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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