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  • 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 (...)

  • Formulaire personnalisable

    21 juin 2013, par

    Cette page présente les champs disponibles dans le formulaire de publication d’un média et il indique les différents champs qu’on peut ajouter. Formulaire de création d’un Media
    Dans le cas d’un document de type média, les champs proposés par défaut sont : Texte Activer/Désactiver le forum ( on peut désactiver l’invite au commentaire pour chaque article ) Licence Ajout/suppression d’auteurs Tags
    On peut modifier ce formulaire dans la partie :
    Administration > Configuration des masques de formulaire. (...)

  • Qu’est ce qu’un masque de formulaire

    13 juin 2013, par

    Un masque de formulaire consiste en la personnalisation du formulaire de mise en ligne des médias, rubriques, actualités, éditoriaux et liens vers des sites.
    Chaque formulaire de publication d’objet peut donc être personnalisé.
    Pour accéder à la personnalisation des champs de formulaires, il est nécessaire d’aller dans l’administration de votre MediaSPIP puis de sélectionner "Configuration des masques de formulaires".
    Sélectionnez ensuite le formulaire à modifier en cliquant sur sont type d’objet. (...)

Sur d’autres sites (9921)

  • Why does ffmpeg need DNS resolver as its dependencies ?

    20 décembre 2019, par Kshitij

    I was installing FFmpeg and libav today using brew install ffmpeg libav when I noticed unbound in the dependencies list.

    It’s very strange because unbound is DNS resolver and why ffmpeg would need it.

    ❯ brew install ffmpeg libav
    
==> Installing dependencies for ffmpeg: aom, frei0r, gmp, libtasn1, nettle, p11-kit, unbound, gnutls, lame, libass, libbluray, libsoxr, libvidstab, libvpx, opencore-amr, opus, libsndfile, libsamplerate, rubberband, sdl2, speex, giflib, leptonica, tesseract, theora, x264, x265 and xvid

    I even checked the info list for ffmpeg but unbound was not present there

    ❯ brew info ffmpeg
    
ffmpeg: stable 4.2.1 (bottled), HEAD
    
Play, record, convert, and stream audio and video
    
https://ffmpeg.org/
    
/usr/local/Cellar/ffmpeg/4.2.1_2 (287 files, 56.6MB)*
    
- Poured from bottle on 2019-12-19 at 10:45:56
    
From: https://github.com/Homebrew/homebrew-core/blob/master/Formula/ffmpeg.rb
    
==> Dependencies
    
Build: nasm ✘, pkg-config ✔, texi2html ✘
    
Required: aom ✔, fontconfig ✔, freetype ✔, frei0r ✔, gnutls ✔, lame ✔, libass ✔, libbluray ✔, libsoxr ✔, libvidstab ✔, libvorbis ✔, libvpx ✔, opencore-amr ✔, openjpeg ✔, opus ✔, rtmpdump ✔, rubberband ✔, sdl2 ✔, snappy ✔, speex ✔, tesseract ✔, theora ✔, x264 ✔, x265 ✔, xvid ✔, xz ✔
    
==> Options
    
--HEAD
    
    Install HEAD version
    
==> Analytics
    
install: 66,434 (30 days), 280,128 (90 days), 1,079,492 (365 days)
    
install-on-request: 48,053 (30 days), 203,583 (90 days), 759,254 (365 days)
    
build-error: 0 (30 days)

    Links for reference

  • Python FFmpeg : Setting VBR and BT.709

    14 décembre 2019, par Cryptonaut

    I’m using this Python library to programmatically generate a short video using an image (.png) as input. The video needs to match the specifications of another video created by someone else.

    The key differences between my output and the other are the following (these are the media attributes I desire to have) :

    How would I achieve VBR ? It was my understanding ProRes 422 HQ natively used unconstrained VBR yet my output specifies CBR.

    Secondly, as can be seen from my code, I’m attempting to conform to BT.709. However, my media information output does not specify this. What am I doing incorrectly ?

    Here’s my code :

        image = ffmpeg.input(input_image, t='00:00:10', framerate='24000/1001', loop='1', probesize='42M')
    

    
    output = ffmpeg.output(image, output_video,
    
    f='mov',
    
    vcodec='prores_ks',
    
    vprofile='3',
    
    pix_fmt='yuv422p10le',
    
    g='48',
    
    video_track_timescale='24000',
    
    movflags='use_metadata_tags',
    
    timecode='00:00:00:00',
    
    color_primaries='bt709',
    
    color_trc='bt709',
    
    colorspace='bt709',
    
    qcomp='1',
    
    # BT.709 issue solved by adding the bsf option as seen via the line below
    
    bsf='prores_metadata=color_primaries=bt709:color_trc=bt709:colorspace=bt709', 
    
    vf='scale=in_range=full:in_color_matrix=bt709:out_range=full:out_color_matrix=bt709')
    

    
    output.run()

    Here’s the media information produced by my output :

    {
    
   "media":{
    
      "@ref":"Redacted",
    
      "track":[
    
         {
    
            "@type":"General",
    
            "VideoCount":"1",
    
            "OtherCount":"1",
    
            "FileExtension":"mov",
    
            "Format":"MPEG-4",
    
            "Format_Profile":"QuickTime",
    
            "CodecID":"qt  ",
    
            "CodecID_Version":"0000.02",
    
            "CodecID_Compatible":"qt  ",
    
            "FileSize":"196366623",
    
            "Duration":"10.010",
    
            "OverallBitRate":"156936362",
    
            "FrameRate":"23.976",
    
            "FrameCount":"240",
    
            "StreamSize":"2463",
    
            "HeaderSize":"28",
    
            "DataSize":"196364172",
    
            "FooterSize":"2423",
    
            "IsStreamable":"No",
    
            "File_Created_Date":"UTC 2019-12-13 19:26:37.150",
    
            "File_Created_Date_Local":"2019-12-13 19:26:37.150",
    
            "File_Modified_Date":"UTC 2019-12-13 19:27:20.303",
    
            "File_Modified_Date_Local":"2019-12-13 19:27:20.303"
    
         },
    
         {
    
            "@type":"Video",
    
            "StreamOrder":"0",
    
            "ID":"1",
    
            "Format":"ProRes",
    
            "Format_Version":"0",
    
            "Format_Profile":"422 HQ",
    
            "CodecID":"apch",
    
            "Duration":"10.010",
    
            "BitRate_Mode":"CBR",
    
            "BitRate":"156934237",
    
            "Width":"1920",
    
            "Height":"1080",
    
            "Sampled_Width":"1920",
    
            "Sampled_Height":"1080",
    
            "PixelAspectRatio":"1.000",
    
            "DisplayAspectRatio":"1.778",
    
            "Rotation":"0.000",
    
            "FrameRate_Mode":"CFR",
    
            "FrameRate":"23.976",
    
            "FrameCount":"240",
    
            "ColorSpace":"YUV",
    
            "ChromaSubsampling":"4:2:2",
    
            "ScanType":"Progressive",
    
            "Delay":"0.000",
    
            "StreamSize":"196364160",
    
            "Encoded_Library":"Lavc",
    
            "colour_description_present":"Yes",
    
            "colour_description_present_Source":"Stream",
    
            "colour_primaries_Source":"Stream",
    
            "transfer_characteristics_Source":"Stream",
    
            "matrix_coefficients_Source":"Stream"
    
         },
    
         {
    
            "@type":"Other",
    
            "StreamOrder":"1",
    
            "ID":"2",
    
            "Type":"Time code",
    
            "Format":"QuickTime TC",
    
            "Duration":"10.010",
    
            "FrameRate":"23.976",
    
            "TimeCode_FirstFrame":"00:00:00:00",
    
            "TimeCode_Striped":"Yes",
    
            "Language":"en",
    
            "Default":"No"
    
         }
    
      ]
    
   }
    
}

    Here’s the media information spec I’m trying to match :

    {
    
   "media":{
    
      "@ref":"Redacted",
    
      "track":[
    
         {
    
            "@type":"General",
    
            "VideoCount":"1",
    
            "OtherCount":"1",
    
            "FileExtension":"mov",
    
            "Format":"MPEG-4",
    
            "Format_Profile":"QuickTime",
    
            "CodecID":"qt  ",
    
            "CodecID_Version":"2005.03",
    
            "CodecID_Compatible":"qt  ",
    
            "FileSize":"1397430682",
    
            "Duration":"70.737",
    
            "OverallBitRate_Mode":"VBR",
    
            "OverallBitRate":"158042403",
    
            "FrameRate":"23.976",
    
            "FrameCount":"1696",
    
            "StreamSize":"9898",
    
            "HeaderSize":"28",
    
            "DataSize":"1397420796",
    
            "FooterSize":"9858",
    
            "IsStreamable":"No",
    
            "Encoded_Date":"UTC 2019-04-29 22:26:32",
    
            "Tagged_Date":"UTC 2019-04-29 22:26:32",
    
            "File_Created_Date":"UTC 2019-12-12 16:52:57.215",
    
            "File_Created_Date_Local":"2019-12-12 16:52:57.215",
    
            "File_Modified_Date":"UTC 2019-12-12 17:25:58.903",
    
            "File_Modified_Date_Local":"2019-12-12 17:25:58.903",
    
            "Encoded_Application":"DVP Factory r561 (2019-04-25), Host: dvp07"
    
         },
    
         {
    
            "@type":"Video",
    
            "StreamOrder":"0",
    
            "ID":"1",
    
            "Format":"ProRes",
    
            "Format_Version":"0",
    
            "Format_Profile":"422 HQ",
    
            "CodecID":"apch",
    
            "Duration":"70.737",
    
            "Duration_LastFrame":"-0.000",
    
            "BitRate_Mode":"VBR",
    
            "BitRate":"158040381",
    
            "Width":"1920",
    
            "Height":"1080",
    
            "Sampled_Width":"1920",
    
            "Sampled_Height":"1080",
    
            "PixelAspectRatio":"1.000",
    
            "DisplayAspectRatio":"1.778",
    
            "Rotation":"0.000",
    
            "FrameRate_Mode":"CFR",
    
            "FrameRate":"23.976",
    
            "FrameCount":"1696",
    
            "ColorSpace":"YUV",
    
            "ChromaSubsampling":"4:2:2",
    
            "ScanType":"Progressive",
    
            "Delay":"0.000",
    
            "StreamSize":"1397420784",
    
            "Encoded_Library":"agi0",
    
            "Language":"en",
    
            "Encoded_Date":"UTC 2019-04-29 22:26:32",
    
            "Tagged_Date":"UTC 2019-04-29 22:26:32",
    
            "colour_description_present":"Yes",
    
            "colour_description_present_Source":"Container / Stream",
    
            "colour_primaries":"BT.709",
    
            "colour_primaries_Source":"Container",
    
            "colour_primaries_Original_Source":"Stream",
    
            "transfer_characteristics":"BT.709",
    
            "transfer_characteristics_Source":"Container",
    
            "transfer_characteristics_Original_Source":"Stream",
    
            "matrix_coefficients":"BT.709",
    
            "matrix_coefficients_Source":"Container / Stream"
    
         },
    
         {
    
            "@type":"Other",
    
            "StreamOrder":"1",
    
            "ID":"2",
    
            "Type":"Time code",
    
            "Format":"QuickTime TC",
    
            "Duration":"70.737",
    
            "FrameRate":"23.976",
    
            "TimeCode_FirstFrame":"00:00:00:00",
    
            "TimeCode_Striped":"Yes",
    
            "Language":"en",
    
            "extra":{
    
               "Encoded_Date":"UTC 2019-04-29 22:26:32",
    
               "Tagged_Date":"UTC 2019-04-29 22:26:32"
    
            }
    
         }
    
      ]
    
   }
    
}

  • Empty stream when cutting a video using ffmpeg

    17 décembre 2019, par dscv

    When I try cutting a video, it outputs an empty stream (262 byte video with 0s duration). Would appreciate any insight, thanks.

    Command used :
    ffmpeg -i /path/to/long/video.mp4 -ss 37.69 -t 4.96 -c copy /path/to/short/video.mp4

    However, when I the following (more inaccurate) command, it outputs a video. This video also has some problems, as the last frame is repeated several times, making the video one second longer (with a frozen image for one second).

    ffmpeg -ss 37.69 -i /path/to/long/video.mp4 -t 4.96 -c copy /path/to/short/video.mp4

    ffmpeg version : ffmpeg version 3.4.6-0ubuntu0.18.04.1

    The outputs for the two commands are :

    First command :

      built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
    
  configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --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-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --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-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
    
  libavutil      55. 78.100 / 55. 78.100
    
  libavcodec     57.107.100 / 57.107.100
    
  libavformat    57. 83.100 / 57. 83.100
    
  libavdevice    57. 10.100 / 57. 10.100
    
  libavfilter     6.107.100 /  6.107.100
    
  libavresample   3.  7.  0 /  3.  7.  0
    
  libswscale      4.  8.100 /  4.  8.100
    
  libswresample   2.  9.100 /  2.  9.100
    
  libpostproc    54.  7.100 / 54.  7.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/proj/vondrick/datasets/HowTo100M/video/Cars_&_Other_Vehicles/Motorcycles/52907/video_nVbIUDjzWY4.mp4':
    
  Metadata:
    
    major_brand     : dash
    
    minor_version   : 0
    
    compatible_brands: iso6avc1mp41
    
    creation_time   : 2015-06-26T00:39:04.000000Z
    
  Duration: 00:07:14.40, start: 0.000000, bitrate: 244 kb/s
    
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(progressive), 426x240 [SAR 1:1 DAR 71:40], 2 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc (default)
    
    Metadata:
    
      creation_time   : 2015-06-26T00:39:04.000000Z
    
      handler_name    : VideoHandler
    
Output #0, mp4, to '/proj/vondrick/datasets/HowTo100M/cropped_video/Cars_&_Other_Vehicles/Motorcycles/52907/nVbIUDjzWY4/video_000000_p.mp4':
    
  Metadata:
    
    major_brand     : dash
    
    minor_version   : 0
    
    compatible_brands: iso6avc1mp41
    
    encoder         : Lavf57.83.100
    
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(progressive), 426x240 [SAR 1:1 DAR 71:40], q=2-31, 2 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 90k tbc (default)
    
    Metadata:
    
      creation_time   : 2015-06-26T00:39:04.000000Z
    
      handler_name    : VideoHandler
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
Press [q] to stop, [?] for help
    
frame=    0 fps=0.0 q=-1.0 Lsize=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
    
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

    Second command :

    ffmpeg version 3.4.6-0ubuntu0.18.04.1 Copyright (c) 2000-2019 the FFmpeg developers
    
  built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
    
  configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --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-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --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-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
    
  libavutil      55. 78.100 / 55. 78.100
    
  libavcodec     57.107.100 / 57.107.100
    
  libavformat    57. 83.100 / 57. 83.100
    
  libavdevice    57. 10.100 / 57. 10.100
    
  libavfilter     6.107.100 /  6.107.100
    
  libavresample   3.  7.  0 /  3.  7.  0
    
  libswscale      4.  8.100 /  4.  8.100
    
  libswresample   2.  9.100 /  2.  9.100
    
  libpostproc    54.  7.100 / 54.  7.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/proj/vondrick/datasets/HowTo100M/video/Cars_&_Other_Vehicles/Motorcycles/52907/video_nVbIUDjzWY4.mp4':
    
  Metadata:
    
    major_brand     : dash
    
    minor_version   : 0
    
    compatible_brands: iso6avc1mp41
    
    creation_time   : 2015-06-26T00:39:04.000000Z
    
  Duration: 00:07:14.40, start: 0.000000, bitrate: 244 kb/s
    
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(progressive), 426x240 [SAR 1:1 DAR 71:40], 2 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc (default)
    
    Metadata:
    
      creation_time   : 2015-06-26T00:39:04.000000Z
    
      handler_name    : VideoHandler
    
Output #0, mp4, to '/proj/vondrick/datasets/HowTo100M/cropped_video/Cars_&_Other_Vehicles/Motorcycles/52907/nVbIUDjzWY4/video_000000_3.mp4':
    
  Metadata:
    
    major_brand     : dash
    
    minor_version   : 0
    
    compatible_brands: iso6avc1mp41
    
    encoder         : Lavf57.83.100
    
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(progressive), 426x240 [SAR 1:1 DAR 71:40], q=2-31, 2 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 90k tbc (default)
    
    Metadata:
    
      creation_time   : 2015-06-26T00:39:04.000000Z
    
      handler_name    : VideoHandler
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
Press [q] to stop, [?] for help
    
frame=  159 fps=0.0 q=-1.0 Lsize=     159kB time=00:00:04.95 bitrate= 263.0kbits/s speed=1.89e+03x    
    
video:158kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.909119%

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