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  • 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 (...)

  • Participer à sa traduction

    10 avril 2011

    Vous pouvez nous aider à améliorer les locutions utilisées dans le logiciel ou à traduire celui-ci dans n’importe qu’elle nouvelle langue permettant sa diffusion à de nouvelles communautés linguistiques.
    Pour ce faire, on utilise l’interface de traduction de SPIP où l’ensemble des modules de langue de MediaSPIP sont à disposition. ll vous suffit de vous inscrire sur la liste de discussion des traducteurs pour demander plus d’informations.
    Actuellement MediaSPIP n’est disponible qu’en français et (...)

  • Gestion de la ferme

    2 mars 2010, par

    La ferme est gérée dans son ensemble par des "super admins".
    Certains réglages peuvent être fais afin de réguler les besoins des différents canaux.
    Dans un premier temps il utilise le plugin "Gestion de mutualisation"

Sur d’autres sites (12595)

  • ffmpeg how to trigger color changes based on time

    2 janvier 2021, par Plazar99

    My goal is to modify the color of an image overlay at specific times in a video file.
I use AI to determine the emotion of the subtitles, and change the background color based on emotions.
I've already figured out the subtitle.srt usage, and I know when to trigger which color.
I need a clue on how to do it in ffmpeg.

    


  • FFMPEG Using video in to add Watermark

    15 janvier 2021, par Lakhan

    I have tried the below code using my Command line.

    


    ffmpeg -i ed_hd.mp4 -i watermark.png -filter_complex "overlay=20:20" 1610690297-6555.mp4

    


    But didn't works this.

    


    And getting error like that.
The encoder 'aac' is experimental but experimental codecs are not enabled, add '-strict -2' if you want to use it.

    


    tried many times didn't get any success on it. if anyone can help on then I am thankful.

    


  • Compatibility of P-frames and multithreading in FFmpeg library in C

    16 mai 2023, par Rachel

    I am working on a video processing project using the FFmpeg library in C. I would like to inquire about the compatibility and support for utilizing P-frames (predictive frames) and multithreading simultaneously in FFmpeg. Currently, I am exploring two options for achieving multithreading with FFmpeg :

    


      

    1. Setting the i_threads parameter of FFmpeg to a value greater than 1.

      2. 


    2. My application opens multiple threads, where each thread creates a codec context
and performs parallel compression/decompression of frames from a shared FIFO.

      3. 


    


    I have tried option 1, but I did not observe any noticeable time difference compared to using only one thread. I am seeking an understanding of why this might be the case.

    


    I have tried option 2, which has resulted in improved compression/decompression times for the frames. However, I would like to understand why does it work. Since I am utilizing P-Frames, where each P-frame depends on the latest I-Frame, how can I ensure that the decompression of P-Frames starts after the I-Frame has finished processing when dealing with multiple codec contexts ?

    


    I have two proceccses one for encodeing and one for decoding.
I'd like to improve times using threads in both of them.

    


    The encoder process code :

    


    pt_handle->t_x264_param.i_threads = 24;

    


    pt_handle->pt_x264_encoder = x264_encoder_open(&pt_handle->t_x264_param);

    


    The decoder process code :

    


    pt_handle->pt_avcodec_ctx->thread_count = 23;

    


    pt_handle->pt_avcodec_ctx->thread_type = FF_THREAD_FRAME ;

    


    i_retval = avcodec_open2(pt_handle->pt_avcodec_ctx, pt_h264_decoder, NULL);

    


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