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Autres articles (67)

  • Configurer la prise en compte des langues

    15 novembre 2010, par

    Accéder à la configuration et ajouter des langues prises en compte
    Afin de configurer la prise en compte de nouvelles langues, il est nécessaire de se rendre dans la partie "Administrer" du site.
    De là, dans le menu de navigation, vous pouvez accéder à une partie "Gestion des langues" permettant d’activer la prise en compte de nouvelles langues.
    Chaque nouvelle langue ajoutée reste désactivable tant qu’aucun objet n’est créé dans cette langue. Dans ce cas, elle devient grisée dans la configuration et (...)

  • D’autres logiciels intéressants

    12 avril 2011, par

    On ne revendique pas d’être les seuls à faire ce que l’on fait ... et on ne revendique surtout pas d’être les meilleurs non plus ... Ce que l’on fait, on essaie juste de le faire bien, et de mieux en mieux...
    La liste suivante correspond à des logiciels qui tendent peu ou prou à faire comme MediaSPIP ou que MediaSPIP tente peu ou prou à faire pareil, peu importe ...
    On ne les connais pas, on ne les a pas essayé, mais vous pouvez peut être y jeter un coup d’oeil.
    Videopress
    Site Internet : (...)

  • Contribute to documentation

    13 avril 2011

    Documentation is vital to the development of improved technical capabilities.
    MediaSPIP welcomes documentation by users as well as developers - including : critique of existing features and functions articles contributed by developers, administrators, content producers and editors screenshots to illustrate the above translations of existing documentation into other languages
    To contribute, register to the project users’ mailing (...)

Sur d’autres sites (6821)

  • How FPS reduction for H264 without transcode ? [duplicate]

    16 mai 2024, par Александр А

    There is a USB camera that sends H264 frames with a frequency of 30 fps in a resolution of 1920x1080, GOP size 30 or 60 (1 or 2 I frame per second depending on the camera and only P-frames), which requires throughput of about 6 mbit/s. It is necessary to reduce this to no more than 2 mbit/s. All this is done on a weak ARMv7, so the option of transcoding is extremely resource intensive, especially considering that I did not find how to do it as a GPU Mali (NanoPi Neo Core).

    


    Given that the basic functionality is performed on the framework ffmpeg, is it possible to reduce the frame rate, ideally to 10 fps, WITHOUT loss of quality and decoding ?

    


    maybe I figured out how to define only I frames from NALU

    


    (AVPacket.data[4] & 0x1F) == 7


    


    I know that some analyze raw h264 frames to search for movement. Perhaps there is a algorithm way add up or "delete" P-frames

    


  • FFmpeg output buffer/delay reduction

    23 août 2017, par Anton B

    I would like to get frames as they become available from FFmpeg.
    I tried different codecs and options both for video and audio conversion but here is a simple example :

    ffmpeg -i rtmp ://input -vn -c:a libmp3lame -f mp3 -reservoir 0 http://127.0.0.1:7885

    and there is also an http server on the localhost that gets the data and outputs timings between successive chunks.
    It seems it gets it in batches (which happens when transcode_step -> reap_filters -> do_video_out/do_audio_out in ffmpeg.c is called) and there are 0.5-1.5 second pauses in between.
    Different options like -maxrate, -bufsize, -g, -muxdelay, -tune zerolatency didn’t seem to do any difference.
    EDIT
    It seems that setting -re (Read input at native frame rate) removes the issue, but is says it ’Should not be used with actual grab devices or live input streams (where it can cause packet loss).’.

  • Save video from rtsp and play in exoplayer simultaneously [closed]

    25 janvier 2024, par Julian Peña Gallego

    I am trying to receive a live stream via RTSP from an IP camera in Android Kotlin, I am recording the video to a local file with ffmpegkit but I must additionally view the live stream.

    


    When I record the live stream with ffmpeg without playing the stream through exoplayer it works fine, but when both processes are running there is packet loss in the video recording or in the exoplayer.

    


    Then I tried to get exoplayer to play the video that ffmpeg was recording, but it gave me an error since the file has not been closed yet.

    


    Could you provide me with a solution ? I have found on the internet that it is possible with server sockets but they do not indicate how to do it.

    


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