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Autres articles (78)

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    Jolie sélection multiple
    Le plugin Chosen permet d’améliorer l’ergonomie des champs de sélection multiple. Voir les deux images suivantes pour comparer.
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    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
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  • HTML5 audio and video support

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    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
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Sur d’autres sites (10881)

  • Empty line output while using Popen with ffmpeg

    27 mai 2019, par Elena_Ouyangmeng

    I’m trying to get information output from the command :

    ffmpeg -i 2019-04-22_16-45-14.mp4 -loop 1 -i image.png -an -filter_complex "blend=difference:shortest=1,blackframe=99:32" -f null -

    When trying this command in command line - the info is there, but when I try to use Popen - nothing (None, None)

    I’ve tried subprocess, and tried os.popen earlier.

    command = 'ffmpeg -i 2019-04-22_16-45-14.mp4 -loop 1 -i image.png -an -filter_complex "blend=difference:shortest=1,blackframe=99:32" -f null -'
    
subproc = subprocess.Popen(command.split(' '), shell=True)
    
x = subproc.communicate()
    
print(x)

  • How to add two video filters in one command line which has transcoding done by two GPUs ?

    3 août 2022, par Max Dax

    I have two video filters :

    


    


    -vf "hwdownload, drawtext=fontfile=/usr/share/fonts/TTF/Verdana.ttf:text='Hello World',
format=nv12, hwupload"

    


    


    and

    


    


    -vf "select='gt(scene,0.04)'" -vsync 0 'snapshot.png'

    


    


    How can I add these two video filters to the below command line which does transcoding from a webcam livestream of MJPG to HEVC using two GPUs ? :

    


    


    ffmpeg
-init_hw_device cuda=decdev :/dev/dri/renderD129
-init_hw_device vaapi=encdev :/dev/dri/renderD128
-hwaccel cuda
-hwaccel_device decdev
-hwaccel_output_format cuda
-c:v mjpeg_cuvid
-f v4l2 -input_format mjpeg -framerate 30 -video_size 1920x1080
-i /dev/video0
-filter_hw_device encdev
-c:v hevc_vaapi webcam.mp4"

    


    


    Basically what I am trying to do is using FFMPEG to transcode and record a live webcam stream and also at the same time take snapshots when motion is detected.

    


    Thanks

    


  • avformat/hlsenc : Fix the method command line parameter

    14 septembre 2015, par Michael Niedermayer
    avformat/hlsenc : Fix the method command line parameter

    Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
    • [DH] libavformat/hlsenc.c

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