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Autres articles (55)

  • 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

  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
    The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
    For older browsers the Flowplayer flash fallback is used.
    MediaSPIP allows for media playback on major mobile platforms with the above (...)

  • De l’upload à la vidéo finale [version standalone]

    31 janvier 2010, par

    Le chemin d’un document audio ou vidéo dans SPIPMotion est divisé en trois étapes distinctes.
    Upload et récupération d’informations de la vidéo source
    Dans un premier temps, il est nécessaire de créer un article SPIP et de lui joindre le document vidéo "source".
    Au moment où ce document est joint à l’article, deux actions supplémentaires au comportement normal sont exécutées : La récupération des informations techniques des flux audio et video du fichier ; La génération d’une vignette : extraction d’une (...)

Sur d’autres sites (6841)

  • libavformat stuck in ff_network_wait_fd

    3 juin 2020, par Daniel

    I'm using libavformat for remuxing some live video feeds (rtsp).

    



    I can't really create a minimal reproducable example, because the issue is not reproducable, but I have an attached debugger and if I have any minimal chance to examine the root cause I'd not skip any chance.

    



    The stream is opened via avformat_open_input, and there is a custom IO for writing the output (avformat_alloc_output_context2).

    



    The problem is that avformat is stuck in ff_network_wait_fd, at least by gdb :

    



    #0  0xb673e120 in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x004a3ff4 in ff_network_wait_fd (fd=-1357954584, write=1) at libavformat/network.c:72
#2  0xaf0f428e in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)


    



    There was a network failure during the connection or the stream and I have not got any aggressive stream closing mechanism (everything is non blocking, there is no waits, sleeps, everything is event-based by libev).

    



    This just happened once during one month so it's very hard to reproduce but it is still running and gdb is attached.

    



    I'm curious if I have any chance to dig deeper. The stack seems corrupted and also the fd seems invalid for what ff_network_wait_fd waits for.

    



    Also, I never call ff_network_wait_fd directly, but there is an alternative : ff_network_wait_fd_timeout. Is it possible to ask libavformat to use this alternative so it won't block my thread if there is unreliable network ?

    


  • ffmpeg merge video and audio + fade out

    1er mai 2016, par jacky brown

    I have one video file and one audio file.
    I want to merge them together that the final output video will be in the length of the video and will contain the audio in the background.

    i did :

    ffmpeg -i output.avi -i bgmusic.mp3 -filter_complex " [1:0] apad " -shortest out.avi

    but the background audio is cut in the end of the final merge movie.
    i want it to fade out nicely.

    how can i do it ??

    but the background audio is cut in the end of the final merge movie.
    i want it to fade out nicely.

    how can i do it ??

    thanks.

  • Clips from a Live Video

    12 mai 2022, par Jorge Borreguero Sanmartin

    I am doing a program in Python that gets clips from a live video. To do so, with opencv I get the currrrent_frame_position and with the fps I get the start and final time to run this command :

    


    ffmpeg -i live_video.ts -ss 00:01:30 -to 00:02:00 -c:v copy output.ts

    


    To improve, I want to start dumping the live_video on the new file once I know the starting time, and finish once I get the final time. My intention is to make this process faster and get the result file sooner. It is not necessary to use ffmpeg but it is the tool that I have been using. How can I do this ?

    


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