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Autres articles (9)

  • Support de tous types de médias

    10 avril 2011

    Contrairement à beaucoup de logiciels et autres plate-formes modernes de partage de documents, MediaSPIP a l’ambition de gérer un maximum de formats de documents différents qu’ils soient de type : images (png, gif, jpg, bmp et autres...) ; audio (MP3, Ogg, Wav et autres...) ; vidéo (Avi, MP4, Ogv, mpg, mov, wmv et autres...) ; contenu textuel, code ou autres (open office, microsoft office (tableur, présentation), web (html, css), LaTeX, Google Earth) (...)

  • 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 (...)

  • Supporting all media types

    13 avril 2011, par

    Unlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)

Sur d’autres sites (3985)

  • 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);

    


  • using ffmpeg in C : system() or C api ?

    5 décembre 2018, par toastedDeli

    I want to use ffmpeg’s transcoding features multiple times in my program. This can be achieved by doing

    ffmpeg -i input output

    in a terminal. I believe I can use some shell or C code to execute these commands programmatically.

    I could also directly use ffmpeg’s c libraries to do this. My question is, will there be a noticeable performance difference between the 2 approaches ? Obviously the first will be simpler to implement, but will I pay a big performance cost ?

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