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Autres articles (21)

  • 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

  • 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 (...)

  • Use, discuss, criticize

    13 avril 2011, par

    Talk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
    The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
    A discussion list is available for all exchanges between users.

Sur d’autres sites (4615)

  • ffmpeg : how to save h264 raw data as mp4 file

    15 avril 2016, par monkid

    I encode h264 data by libavcodec.
    ex.

    while (1) {
    
  ...
    
  avcodec_encode_video(pEnc->pCtx, OutBuf, ENC_OUTSIZE, pEnc->pYUVFrame);
    
  ...
    
}

    If I directly save OutBuf data as a .264 file, it can`t be play by player. Now I want to save OutBuf

    as a mp4 file. Anyone know how to do this by ffmpeg lib ? thanks.

  • Injecting KLV data in video stream using ffmpeg

    29 octobre 2022, par lsilk

    Does anyone here have any experience with streaming video on one stream, for example 0:0, and then taking a .bin file in klv format and putting it in 0:1, and then outputting that to a mpegts udp stream ? I have it working, the only problem is that I have written a python program to update the klv data file while it is streaming, but it doesn't seem to be updated in the stream.

    


    My command : ffmpeg -I "filepath.mpg" -f data -i "filepath.bin" -filter:v fps=60 -map 0:v:0 -map 1:d:0 -f mpegts udp ://IP:PORT

    


    Ive tried -I from a local file, I've also tried streaming the .bin file from an other stream after updating it, but then the fps drops to about 0.5.

    


  • How OpenGL directly manipulates data on GPU that a video hardware decoded by FFmpeg CUDA

    24 janvier 2019, par gn cavalry

    Ubuntu 18.04
    FFmpeg 4.1
    CUDA 10.0

    What I want to do is using FFmpeg CUDA decode a video, directly peocess data on GPU by GLSL , then encode data using FFmpeg CUDA. Like this :

    Raw Video —> FFmpeg CUDA decoder —> GLSL —> FFmpeg CUDA encoder —> New Video

    Here is the short code :

    ret = avcodec_send_packet(decoder_ctx, pkt);
    
while (ret >= 0) {
    
    ret = avcodec_receive_frame(decoder_ctx, frame);
    

    
    /**
    
     * Now CUDA decoded data is stored on GPU and referenced by frame
    
     * How can GLSL manipulate decoded data on GPU directly, 
    
     * without transfer it to CPU and load to GPU again by glTexImage2D()
    
     */
    

    

    
    // I don't if the following code is right, if GLSL processed data is still referenced by frame
    
    while (avcodec_send_frame(encoder_ctx, frame)) {
    
        avcodec_receive_packet(encoder_ctx, &enc_pkt);
    
    }
    
}

    Can anyone help me ? Thanks very much !

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