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Médias (1)

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  • 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

  • Emballe médias : à quoi cela sert ?

    4 février 2011, par

    Ce plugin vise à gérer des sites de mise en ligne de documents de tous types.
    Il crée des "médias", à savoir : un "média" est un article au sens SPIP créé automatiquement lors du téléversement d’un document qu’il soit audio, vidéo, image ou textuel ; un seul document ne peut être lié à un article dit "média" ;

  • 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 (...)

Sur d’autres sites (9672)

  • ImagickPixelIterator is not read-only after all..

    9 juin 2010, par Mikko Koppanen — Imagick, PHP stuff

    A few days ago I got a help request from a user : "How do you change pixel color during the iteration with ImagickPixelIterator". My initial response was that ImagickPixelIterator is read-only. Well, I have to admit I was wrong. After searching trough ImageMagick docs I stumbled across an (...)

  • "Undefined reference to `avcodec_alloc_frame" Error when compile and install Opencv on linux

    7 avril 2016, par Kathy Lee

    I am compiling and installing OpenCV using the steps in http://docs.opencv.org/2.4/doc/tutorials/introduction/linux_install/linux_install.html

    But during "making" it, it has error when it reaches 45%. The error message is

    ...
    
[ 43%] Built target pch_Generate_opencv_video
    
[ 44%] Built target opencv_video
    
[ 44%] Built target opencv_perf_video_pch_dephelp
    
[ 45%] Built target pch_Generate_opencv_perf_video  
    
Linking CXX executable ../../bin/opencv_perf_video
    
../../lib/libopencv_videoio.so.3.1.0: undefined reference to `avcodec_alloc_frame'
    
../../lib/libopencv_videoio.so.3.1.0: undefined reference to `avcodec_encode_video'
    
collect2: error: ld returned 1 exit status
    
make[2]: *** [bin/opencv_perf_video] Error 1
    
make[1]: *** [modules/video/CMakeFiles/opencv_perf_video.dir/all] Error 2
    
make: *** [all] Error 2

    I downloaded and installed the latest version of ffmpeg from https://www.ffmpeg.org/.

    Anyone knows how can I fix the errors ?

    Thank you.

  • FFmpeg takes too much time for generating m3u8 files from a mp4 file (166MB)

    3 août 2021, par Angele

    I am using ffmpeg in nodejs to generate 4 different resolutions (360p, 480p, 720p, 1080p).
I use a AWS lambda for each resolution and the last two take too much time.
I convert a mp4 file which has a size of 166MB into .ts files (with all segments associated)
It takes more than 900 seconds, and that's above the limit for a lambda timeout.

    


    Also my goal is to encode mp4 videos of a maximum size of 4go... and it would be to encode within 900 seconds maximum for each resolution.

    


    I used this website to find some parameters : https://docs.peer5.com/guides/production-ready-hls-vod/

    


    These are my parameters given to ffmpeg :

    


    "ffmpegParams": [
    "-vf",
    "scale=-2:1920",
    "-c:a",
    "aac",
    "-ar",
    "48000",
    "-c:v",
    "h264",
    "-profile:v",
    "main",
    "-crf",
    "20",
    "-sc_threshold",
    "0",
    "-g",
    "48",
    "-keyint_min",
    "48",
    "-hls_time",
    "4",
    "-hls_playlist_type",
    "vod",
    "-b:v",
    "5000k",
    "-maxrate",
    "5350k",
    "-bufsize",
    "7500k",
    "-b:a",
    "192k",
    "-hls_segment_filename",
    "/tmp/1080p_%03d.ts",
    "/tmp/1080p.m3u8"
]


    


    Also I tried with these parameters '-vcodec', 'libx264', '-preset', 'ultrafast' and it made it faster but it is not enough...

    


    Maybe there's something wrong with my command. If someone could maybe enlighten me ? :)

    


    Edit : I ended up using an EC Fargate, perfect for this kind of need.

    


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