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  • Des sites réalisés avec MediaSPIP

    2 mai 2011, par

    Cette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
    Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page.

  • 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 (...)

  • Librairies et binaires spécifiques au traitement vidéo et sonore

    31 janvier 2010, par

    Les logiciels et librairies suivantes sont utilisées par SPIPmotion d’une manière ou d’une autre.
    Binaires obligatoires FFMpeg : encodeur principal, permet de transcoder presque tous les types de fichiers vidéo et sonores dans les formats lisibles sur Internet. CF ce tutoriel pour son installation ; Oggz-tools : outils d’inspection de fichiers ogg ; Mediainfo : récupération d’informations depuis la plupart des formats vidéos et sonores ;
    Binaires complémentaires et facultatifs flvtool2 : (...)

Sur d’autres sites (5143)

  • Unknown V4L2 pixel format equivalent for yuvj420p

    23 mars 2020, par c10ud

    I am trying to pipe a mp4 video located in Videos/video.mp4 to a virtual webcam device located at /dev/video0.

    I tried running :
    ffmpeg -re -i Videos/video.mp4 -map 0:v -f v4l2 /dev/video0
    and I keep getting the following error :

    [video4linux2,v4l2 @ 0x5580cf270100] Unknown V4L2 pixel format equivalent for yuvj420p
    
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
    
Error initializing output stream 0:0 -- 
    
Conversion failed!

    Full log :

    ffmpeg version 4.2.2-1+b1 Copyright (c) 2000-2019 the FFmpeg developers
    
  built with gcc 9 (Debian 9.2.1-28)
    
  configuration: --prefix=/usr --extra-version=1+b1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
    
  libavutil      56. 31.100 / 56. 31.100
    
  libavcodec     58. 54.100 / 58. 54.100
    
  libavformat    58. 29.100 / 58. 29.100
    
  libavdevice    58.  8.100 / 58.  8.100
    
  libavfilter     7. 57.100 /  7. 57.100
    
  libavresample   4.  0.  0 /  4.  0.  0
    
  libswscale      5.  5.100 /  5.  5.100
    
  libswresample   3.  5.100 /  3.  5.100
    
  libpostproc    55.  5.100 / 55.  5.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Videos/video.mp4':
    
  Metadata:
    
    major_brand     : mp42
    
    minor_version   : 0
    
    compatible_brands: isommp42
    
    creation_time   : 2020-03-23T04:24:01.000000Z
    
    com.android.version: 8.1.0
    
  Duration: 00:01:00.14, start: 0.000000, bitrate: 20048 kb/s
    
    Stream #0:0(eng): Video: h264 (Baseline) (avc1 / 0x31637661), yuvj420p(pc, smpte170m), 1920x1080, 19898 kb/s, SAR 1:1 DAR 16:9, 29.43 fps, 29.58 tbr, 90k tbn, 180k tbc (default)
    
    Metadata:
    
      rotate          : 270
    
      creation_time   : 2020-03-23T04:24:01.000000Z
    
      handler_name    : VideoHandle
    
    Side data:
    
      displaymatrix: rotation of 90.00 degrees
    
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 96 kb/s (default)
    
    Metadata:
    
      creation_time   : 2020-03-23T04:24:01.000000Z
    
      handler_name    : SoundHandle
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (h264 (native) -> rawvideo (native))
    
Press [q] to stop, [?] for help
    
[video4linux2,v4l2 @ 0x5580cf270100] Unknown V4L2 pixel format equivalent for yuvj420p
    
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
    
Error initializing output stream 0:0 -- 
    
Conversion failed!

    The desired result is that the mp4 video is seen by apps that try to view the webcam. I am running this on a desktop without a webcam or video interface, which is why I am using /dev/video0

  • FFMPEG sync video from image2pipe with audio from RTMP

    4 juin 2021, par AndreaC

    I have an rtmp url, and i need to put overlay using opencv and keeping audio.

    


    It works well, exept for syncronization between audio and video.

    


    with this command

    


    ffmpeg -re -y -f image2pipe -i - -i rtmp://192.168.178.32:1935/opencv-hls/test -map 0:v:0 -vcodec libx264 -g 50 -keyint_min 50 -map 1:a:0 -b:a 128k -f mpegts -codec:v mpeg1video -b:v 700k -s 1024x576 -bf 0 -q 1 http://localhost:3000/mystream


    


    I open an image2pipe where i send my frame with overlay, and i use the same input of opencv as second command for ffmpeg to acquire audio and send all to mpegts url

    


    This is the ffmpeg output

    


    ffmpeg version 4.1.4-1build2 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.2.1-4ubuntu1)
  configuration: --prefix=/usr --extra-version=1build2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 22.100 / 56. 22.100
  libavcodec     58. 35.100 / 58. 35.100
  libavformat    58. 20.100 / 58. 20.100
  libavdevice    58.  5.100 / 58.  5.100
  libavfilter     7. 40.101 /  7. 40.101
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  3.100 /  5.  3.100
  libswresample   3.  3.100 /  3.  3.100
  libpostproc    55.  3.100 / 55.  3.100
Input #0, image2pipe, from 'pipe:':
  Duration: N/A, bitrate: N/A
    Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1024x576 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 25 tbn, 25 tbc
Input #1, flv, from 'rtmp://192.168.178.32:1935/opencv-hls/test':
  Metadata:
    Server          : NGINX RTMP (github.com/arut/nginx-rtmp-module)
    displayWidth    : 1024
    displayHeight   : 576
    fps             : 0
    profile         : 
    level           : 
  Duration: 00:00:00.00, start: 4.639000, bitrate: N/A
    Stream #1:0: Audio: aac (LC), 44100 Hz, stereo, fltp
    Stream #1:1: Video: h264 (Constrained Baseline), yuv420p(progressive), 1024x576, 29.58 fps, 29.58 tbr, 1k tbn
Stream mapping:
  Stream #0:0 -> #0:0 (mjpeg (native) -> mpeg1video (native))
  Stream #1:0 -> #0:1 (aac (native) -> mp2 (native))
[swscaler @ 0x55f256d63980] deprecated pixel format used, make sure you did set range correctly
Output #0, mpegts, to 'http://localhost:3000/mystream':
  Metadata:
    encoder         : Lavf58.20.100
    Stream #0:0: Video: mpeg1video, yuv420p(progressive), 1024x576 [SAR 1:1 DAR 16:9], q=2-31, 700 kb/s, 25 fps, 90k tbn, 25 tbc
    Metadata:
      encoder         : Lavc58.35.100 mpeg1video
    Side data:
      cpb: bitrate max/min/avg: 0/0/700000 buffer size: 0 vbv_delay: -1
    Stream #0:1: Audio: mp2, 44100 Hz, stereo, s16, 128 kb/s
    Metadata:
      encoder         : Lavc58.35.100 mp2


    


    I always have a delay between audio and video and it increese with time.
Do you have any idea on how to sync them ?

    


    thanks
Andrea

    


  • The ffmpeg webm_dash_manifest demuxer fails with webvtt subtitles

    30 janvier 2020, par Hyldrean

    I am trying to create a DASH manifest using ffmpeg and I encounter some difficulties with the subtitles. I get the error

    [webm_dash_manifest @ 0x55e19db48180] EBML header parsing failed
    
[webm_dash_manifest @ 0x55e19db48180] Failed to read file headers
    
subtitles.vtt: Operation not permitted

    The subtitles are encoded in the plain text webvtt format. I first assume that the EBML header are missing because the subtitles were not contained in a webm container. I then tried to create a webm file containing only the subtitles. It appears impossible.

    I think the problem comes from the webm_dash_manifest demuxer. It seeks metadata in a file with no metadata. However neither Google nor Stack Overflow give me an answer.

    The command I used :

    ffmpeg \
    
-f webm_dash_manifest -i video.webm \
    
-f webm_dash_manifest -i audio.webm \
    
-f webm_dash_manifest -i subtitles.vtt \
    
-map 0 -map 1 -map 2 \
    
-c copy \
    
-f webm_dash_manifest \
    
-adaptation_sets "id=0,streams=0 id=1,streams=1 id=2,stream=2" \
    
minimal.mpd

    and the ffmpeg output :

    ffmpeg version 3.2.14-1~deb9u1 Copyright (c) 2000-2019 the FFmpeg developers
    
  built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
    
  configuration: --prefix=/usr --extra-version='1~deb9u1' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
    
  libavutil      55. 34.101 / 55. 34.101
    
  libavcodec     57. 64.101 / 57. 64.101
    
  libavformat    57. 56.101 / 57. 56.101
    
  libavdevice    57.  1.100 / 57.  1.100
    
  libavfilter     6. 65.100 /  6. 65.100
    
  libavresample   3.  1.  0 /  3.  1.  0
    
  libswscale      4.  2.100 /  4.  2.100
    
  libswresample   2.  3.100 /  2.  3.100
    
  libpostproc    54.  1.100 / 54.  1.100
    
[webm_dash_manifest @ 0x55e19db17160] Could not find codec parameters for stream 0 (Video: vp9, none, 1280x534): unspecified pixel format
    
Consider increasing the value for the 'analyzeduration' and 'probesize' options
    
Input #0, webm_dash_manifest, from 'video.webm':
    
  Metadata:
    
    title           : Cloud Atlas
    
    ENCODER         : Lavf58.35.104
    
  Duration: 00:05:00.01, bitrate: 998 kb/s
    
    Chapter #0:0: start 0.000000, end 300.000000
    
    Metadata:
    
      title           : Chapter 01
    
    Stream #0:0(eng): Video: vp9, none, 1280x534, SAR 1:1 DAR 640:267, 23.98 fps, 23.98 tbr, 1k tbn, 1k tbc (default) (forced)
    
    Metadata:
    
      title           : Video @ 6.9 Mbps [frame B:188517 Avg QP:20.66]
    
      ENCODER         : Lavc58.66.100 libvpx-vp9
    
      DURATION        : 00:05:00.008000000
    
      webm_dash_manifest_duration: 300008
    
      webm_dash_manifest_initialization_range: 900
    
      webm_dash_manifest_file_name: video.webm
    
      webm_dash_manifest_track_number: 1
    
      webm_dash_manifest_cues_start: 37455991
    
      webm_dash_manifest_cues_end: 37457486
    
      webm_dash_manifest_bandwidth: 1420427
    
      webm_dash_manifest_cluster_keyframe: 1
    
      webm_dash_manifest_cue_timestamps: 298715
    
Input #1, webm_dash_manifest, from 'audio.webm':
    
  Metadata:
    
    title           : Cloud Atlas
    
    ENCODER         : Lavf58.35.104
    
  Duration: 00:05:00.01, bitrate: 126 kb/s
    
    Chapter #1:0: start 0.000000, end 300.000000
    
    Metadata:
    
      title           : Chapter 01
    
    Stream #1:0(eng): Audio: opus, 48000 Hz, stereo, fltp (default)
    
    Metadata:
    
      title           : Audio Eng DTS 5.1 channels 24 bits @ 1509 Kbps cbr
    
      ENCODER         : Lavc58.66.100 libopus
    
      DURATION        : 00:05:00.007000000
    
      webm_dash_manifest_duration: 300007
    
      webm_dash_manifest_initialization_range: 838
    
      webm_dash_manifest_file_name: audio.webm
    
      webm_dash_manifest_track_number: 1
    
      webm_dash_manifest_cues_start: 4744091
    
      webm_dash_manifest_cues_end: 4745279
    
      webm_dash_manifest_bandwidth: 137531
    
      webm_dash_manifest_cluster_keyframe: 1
    
      webm_dash_manifest_cue_timestamps: 295000
    
[webm_dash_manifest @ 0x55e19db48180] EBML header parsing failed
    
[webm_dash_manifest @ 0x55e19db48180] Failed to read file headers
    
subtitles.vtt: Operation not permitted

    I noticed that ffmpeg -f webm_dash_manifest -i subtitles.vtt suffices to reproduce the error.

    I have also tried without the -f webm_dash_manifest flag, with no success :

    ffmpeg \
    
-f webm_dash_manifest -i video.webm \
    
-f webm_dash_manifest -i audio.webm \
    
-i subtitles.vtt \
    
-map 0 -map 1 -map 2 \
    
-c copy \
    
-f webm_dash_manifest \
    
-adaptation_sets "id=0,streams=0 id=1,streams=1 id=2,stream=2" minimal.mpd

    Output :

    ffmpeg version 3.2.14-1~deb9u1 Copyright (c) 2000-2019 the FFmpeg developers
    
  built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
    
  configuration: --prefix=/usr --extra-version='1~deb9u1' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
    
  libavutil      55. 34.101 / 55. 34.101
    
  libavcodec     57. 64.101 / 57. 64.101
    
  libavformat    57. 56.101 / 57. 56.101
    
  libavdevice    57.  1.100 / 57.  1.100
    
  libavfilter     6. 65.100 /  6. 65.100
    
  libavresample   3.  1.  0 /  3.  1.  0
    
  libswscale      4.  2.100 /  4.  2.100
    
  libswresample   2.  3.100 /  2.  3.100
    
  libpostproc    54.  1.100 / 54.  1.100
    
[webm_dash_manifest @ 0x557f55dd1160] Could not find codec parameters for stream 0 (Video: vp9, none, 1280x534): unspecified pixel format
    
Consider increasing the value for the 'analyzeduration' and 'probesize' options
    
Input #0, webm_dash_manifest, from 'video.webm':
    
  Metadata:
    
    title           : Cloud Atlas
    
    ENCODER         : Lavf58.35.104
    
  Duration: 00:05:00.01, bitrate: 998 kb/s
    
    Chapter #0:0: start 0.000000, end 300.000000
    
    Metadata:
    
      title           : Chapter 01
    
    Stream #0:0(eng): Video: vp9, none, 1280x534, SAR 1:1 DAR 640:267, 23.98 fps, 23.98 tbr, 1k tbn, 1k tbc (default) (forced)
    
    Metadata:
    
      title           : Video @ 6.9 Mbps [frame B:188517 Avg QP:20.66]
    
      ENCODER         : Lavc58.66.100 libvpx-vp9
    
      DURATION        : 00:05:00.008000000
    
      webm_dash_manifest_duration: 300008
    
      webm_dash_manifest_initialization_range: 900
    
      webm_dash_manifest_file_name: video.webm
    
      webm_dash_manifest_track_number: 1
    
      webm_dash_manifest_cues_start: 37455991
    
      webm_dash_manifest_cues_end: 37457486
    
      webm_dash_manifest_bandwidth: 1420427
    
      webm_dash_manifest_cluster_keyframe: 1
    
      webm_dash_manifest_cue_timestamps: 298715
    
Input #1, webm_dash_manifest, from 'audio.webm':
    
  Metadata:
    
    title           : Cloud Atlas
    
    ENCODER         : Lavf58.35.104
    
  Duration: 00:05:00.01, bitrate: 126 kb/s
    
    Chapter #1:0: start 0.000000, end 300.000000
    
    Metadata:
    
      title           : Chapter 01
    
    Stream #1:0(eng): Audio: opus, 48000 Hz, stereo, fltp (default)
    
    Metadata:
    
      title           : Audio Eng DTS 5.1 channels 24 bits @ 1509 Kbps cbr
    
      ENCODER         : Lavc58.66.100 libopus
    
      DURATION        : 00:05:00.007000000
    
      webm_dash_manifest_duration: 300007
    
      webm_dash_manifest_initialization_range: 838
    
      webm_dash_manifest_file_name: audio.webm
    
      webm_dash_manifest_track_number: 1
    
      webm_dash_manifest_cues_start: 4744091
    
      webm_dash_manifest_cues_end: 4745279
    
      webm_dash_manifest_bandwidth: 137531
    
      webm_dash_manifest_cluster_keyframe: 1
    
      webm_dash_manifest_cue_timestamps: 295000
    
Input #2, webvtt, from 'subtitles.vtt':
    
  Duration: N/A, bitrate: N/A
    
    Stream #2:0: Subtitle: webvtt
    
Could not write header for output file #0 (incorrect codec parameters ?): Operation not permittedStream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
  Stream #1:0 -> #0:1 (copy)
    
  Stream #2:0 -> #0:2 (copy)
    
    Last message repeated 1 times

    Note : [webm_dash_manifest @ 0x557f55dd1160] Could not find codec parameters for stream 0 (Video: vp9, none, 1280x534): unspecified pixel format is harmless according to this post.

    The subtitles have been extracted with ffmpeg :

    ffmpeg -i "Cloud Atlas.mkv" -map 0:6 -t 00:05:00 -c:s webvtt -dash 1 subtitles.vtt

    Thank you for reading my long post, I have no idea what to do next.

    EDIT : The WebM Project website says : ’Initial WebM release does not support subtitles’. Has someone heard of a new release ? Or a convenient way to create DASH manifest with subtitles ?

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