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Autres articles (72)

  • 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

  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

  • Librairies et logiciels spécifiques aux médias

    10 décembre 2010, par

    Pour un fonctionnement correct et optimal, plusieurs choses sont à prendre en considération.
    Il est important, après avoir installé apache2, mysql et php5, d’installer d’autres logiciels nécessaires dont les installations sont décrites dans les liens afférants. Un ensemble de librairies multimedias (x264, libtheora, libvpx) utilisées pour l’encodage et le décodage des vidéos et sons afin de supporter le plus grand nombre de fichiers possibles. Cf. : ce tutoriel ; FFMpeg avec le maximum de décodeurs et (...)

Sur d’autres sites (7641)

  • ffmpeg opening video file at lower bitrate

    23 février 2018, par Xeno Boss

    I have a php page which runs ffmpeg from shell with the exec() function as follows ffmpeg -i rtsp://address:port/stream -b:v 512k output.mp4 and since many people could visit the page at once it could fire up many ffmpeg processes for different rtsp streams simultaneously which will eat up my bandwidth.
    Is there some way for me to reduce the bitrate at which the streams are opened ?

    Note : I assumed the bitrate is the most effective factor for reducing bandwidth, please correct me if you have any better suggestions.

  • How to implement FFMEG library for android video streaming

    10 mai 2014, par Kabir

    I am trying to create online streaming video player in android.
    I am trying to compile the appunite/AndroidFFmpeg library for android application to play HLS videos online. I am using linux-ubuntu OS I also have set the NDK path.
    I have executed all command one by one given on the link :

    https://github.com/appunite/AndroidFFmpeg

    But when I executed the following script :

    ./build_android.sh

    I got the following error :

    abi-gcc —sysroot=/home/singsys-063/android-ndk-r9d/platforms/android-5/arch-arm/
    checking whether the C compiler works... no
    configure : error : in
    /home/singsys-063/AndroidFFmpeg/FFmpegLibrary/jni/vo-amrwbenc :
    configure : error : C compiler cannot create executables
    See config.log for more details

  • how to use the H264 video encoder with ffmpeg / opencv2 ?

    30 août 2023, par Vince

    I am on ubuntu 22.04.

    


    I installed ffmpeg with apt.

    


    I am creating a video from some image files using python/opencv2 (installed via pip)

    


    When I use :

    


    cv2.VideoWriter_fourcc(*"mp4v")


    


    the video is successfully created, but is not supported by firefox.

    


    I read online that the H264 encoder would be a better fit for web-browsers supports.

    


    ffmpeg -codecs | grep h264 


    


    shows :

    


    


    DEV.LS h264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (decoders : h264 h264_v4l2m2m h264_qsv h264_cuvid ) (encoders : libx264 libx264rgb h264_nvenc h264_omx h264_qsv h264_v4l2m2m h264_vaapi nvenc nvenc_h264 )

    


    


    but

    


    cv2.VideoWriter_fourcc(*"h264")


    


    results in :

    


    


    OpenCV : FFMPEG : tag 0x34363268/'h264' is not supported with codec id 27 and format 'mp4 / MP4 (MPEG-4 Part 14)'

    


    


    I could not find online what was wrong (h264 is not installed, how to install it ? the 'fourcc' of h264 is not 'h264' ? I should not create a *.mp4 file ?)

    


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