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Autres articles (18)

  • 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 (...)

  • Other interesting software

    13 avril 2011, par

    We don’t claim to be the only ones doing what we do ... and especially not to assert claims to be the best either ... What we do, we just try to do it well and getting better ...
    The following list represents softwares that tend to be more or less as MediaSPIP or that MediaSPIP tries more or less to do the same, whatever ...
    We don’t know them, we didn’t try them, but you can take a peek.
    Videopress
    Website : http://videopress.com/
    License : GNU/GPL v2
    Source code : (...)

Sur d’autres sites (4962)

  • FFMpeg sync timecode with smpte ltc timecode audio signal

    11 avril 2018, par Olivier Rivard

    I’m trying to capture video from a capture card and I’m extracting 30 jpeg per second.

    I will have multiple computer capturing multiple cameras. I want to sync all those camera with a smpte ltc timecode audio signal pass in the audio line in of the camera.

    What would be the best way to set the timecode with that audio timecode using ffmpeg ?

    Here is the command I have which is sync with the timestamp, but sometime some cameras are out of sync because of the clock of the computer :

    ffmpeg -vsync 0 -f dshow -rtbufsize 1500M -video_size 1920x1080 -use_wallclock_as_timestamps 1 -copyts -r 30 -i video="QP0203 PCI, Analog 01 Capture" -r 30 -vf setpts=PTS-STARTPTS -vsync 0 -vframes 1800 name%d.jpeg -c copy -vsync 0 -vframes 1800 -f mkvtimestamp_v2 file.txt

  • ffmpeg h264_nvenc error [Cannot init Cuda] on NVidia Quadro p620

    13 septembre 2018, par Vitor Silva de Deus

    I’ve installed the nv-codec-headers from https://git.videolan.org/git/ffmpeg/nv-codec-headers.git. whit :

    cd nv-codec-headers && make && sudo make install

    Then I got ffmpeg from https://git.ffmpeg.org/ffmpeg.git and compiled with :

    cd ffmpeg && PATH="$HOME/bin:$PATH" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" ./configure   --prefix="$HOME/ffmpeg_build"   --pkg-config-flags="--static"   --extra-cflags="-I$HOME/ffmpeg_build/include"   --extra-ldflags="-L$HOME/ffmpeg_build/lib"   --extra-libs="-lpthread -lm"   --bindir="$HOME/bin"   --enable-gpl   --enable-libaom   --enable-libass   --enable-libfdk-aac   --enable-libfreetype   --enable-libmp3lame   --enable-libopus   --enable-libvorbis   --enable-libvpx   --enable-libx264   --enable-libx265   --enable-nonfree --enable-cuda --enable-cuvid --enable-nvenc --enable-nonfree --enable-libnpp --extra-cflags=-I/usr/local/cuda/include --extra-ldflags=-L/usr/local/cuda/lib64  && PATH="$HOME/bin:$PATH" make && make install && hash -r

    When I run :

    ffmpeg -hex -rtsp_transport tcp -t 1800 -r 30 -i rtsp://stream_url -c:v h264_nvenc -s:v 360x180 -vsync 0 -preset slow outfile.mp4

    ffmpeg breaks and logs :

    [aac @ 0x5636a2d9f540] Too many bits 8832.000000 > 6144 per frame
    requested, clamping to max

    [swscaler @ 0x5636a33e7840] deprecated pixel format used, make sure
    you did set range correctly

    [h264_nvenc @ 0x5636a2da2880] Cannot init CUDA

    Error initializing output stream 0:0 — Error while opening encoder
    for output stream #0:0 - maybe incorrect parameters such as bit_rate,
    rate, width or height

    [aac @ 0x5636a2d9f540] Qavg : -nan

    [aac @ 0x5636a2d9f540] 1 frames left in the queue on closing
    Conversion failed !

    OS : Ubuntu Server 18.04

    ffmpeg version : N-91936-g776cdd1dc8 Copyright (c) 2000-2018 the FFmpeg developers
    built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)

    CUDA version : 9.2

    GPU Device : Dual NVIDIA Quadro P620, 2 GB, 4 mDP

    Any suggestion on how can i debug or what I’m doing wrong ?! Many thanks !

  • Extract frames with ffmpeg - command [closed]

    20 juin 2021, par liran

    i try to extract frames from video and i found this command :

    


    $"-ss 00:00:01 -t 00:00:06 -i {videoPath} -r 5.0 {resultFolderPath}\\%4d.jpg"


    


    who can explain my this command ?

    


    If for example I want to extract frames from video length of 30 seconds with 60 fps so the expected result is 1800 frames. how can I use this command on this way ?

    


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