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Autres articles (69)

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Creating farms of unique websites

    13 avril 2011, par

    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
    This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...)

  • Personnaliser les catégories

    21 juin 2013, par

    Formulaire de création d’une catégorie
    Pour ceux qui connaissent bien SPIP, une catégorie peut être assimilée à une rubrique.
    Dans le cas d’un document de type catégorie, les champs proposés par défaut sont : Texte
    On peut modifier ce formulaire dans la partie :
    Administration > Configuration des masques de formulaire.
    Dans le cas d’un document de type média, les champs non affichés par défaut sont : Descriptif rapide
    Par ailleurs, c’est dans cette partie configuration qu’on peut indiquer le (...)

Sur d’autres sites (11299)

  • Cannot Play Video Output of Libavcodec (ffmpeg) Encoding Example

    29 octobre 2019, par user3707763

    From FFMPEG’s GitHub, I use the encode_video.c to generate a 1 second video. Here is the example in question : https://github.com/FFmpeg/FFmpeg/blob/master/doc/examples/encode_video.c

    I compile with : gcc -Wall -o ffencode encode_video.c -lavcodec -lavutil -lz -lm

    Clean compile, zero warnings.

    I test the program by running : ./ffencode video.mp4 libx264

    Lots of stats printed out (expected based on source code) as well as ffmpeg logs, but ultimately no errors or warnings.

    However, then the generated output video.mp4, can only be played by ffplay, and VLC Player (as well as Google Chrome) fail to play the video.

    Playing it via vlc command line actually prints :

    [00007ffd3550fec0] main libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface.
    
TagLib: MP4: Invalid atom size
    
TagLib: MP4: Invalid atom size
    
TagLib: MP4: Invalid atom size

    Looking at ffprobe output, the bitrate and duration fields are empty :

    Input #0, h264, from 'video.mp4':
    
  Duration: N/A, bitrate: N/A
    
    Stream #0:0: Video: h264 (High), yuv420p(progressive), 352x288, 25 fps, 25 tbr, 1200k tbn, 50 tbc

    I am using ffmpeg 4.1 with the following configuration :

    ffprobe version 4.1 Copyright (c) 2007-2018 the FFmpeg developers
    
  built with Apple LLVM version 10.0.0 (clang-1000.11.45.5)
    
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.1 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gpl --enable-libmp3lame --enable-libopus --enable-libsnappy --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-opencl --enable-videotoolbox
    
  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

    Any ideas how to fix this ? It is pretty surprising to see an API’s official example to be lacking such basic information.

  • ffmpeg : "Referenced QT chapter track not found"

    29 avril 2019, par Ze'ev

    Using ffmpeg to replace audio in a QuickTime with audio from a WAV.

    Anyone know why I’m getting Referenced QT chapter track not found ?

    Command :

    $ ffmpeg \
    -i "$video" -t 25 \
    -i "$audio" -map 0:v -c:v copy -map 1:a -c:a pcm_s24le -ar 48000 \
    -hide_banner "$output"

    Output :

    [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7faf62010600] Referenced QT chapter track not found
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mov':
    
  Metadata:
    
    major_brand     : qt
    
    minor_version   : 537199360
    
    compatible_brands: qt
    
    creation_time   : 2018-11-06T09:27:43.000000Z
    
  Duration: 00:00:25.00, start: 0.000000, bitrate: 186987 kb/s
    
    Stream #0:0(eng): Video: prores (apch / 0x68637061), yuv422p10le(bt709, progressive), 1920x1080, 185115 kb/s, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 25 tbn, 25 tbc (default)
    
    Metadata:
    
      creation_time   : 2018-11-06T09:27:43.000000Z
    
      handler_name    : Apple Alias Data Handler
    
      encoder         : Apple ProRes 422 (HQ)
    
      timecode        : 00:00:00:00
    
    Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo, s16, 1536 kb/s (default)
    
    Metadata:
    
      creation_time   : 2018-11-06T09:27:43.000000Z
    
      handler_name    : Apple Alias Data Handler
    
      timecode        : 00:00:00:00
    
    Stream #0:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
    
    Metadata:
    
      creation_time   : 2018-11-06T09:27:43.000000Z
    
      handler_name    : Apple Alias Data Handler
    
      timecode        : 00:00:00:00
    
Guessed Channel Layout for Input Stream #1.0 : stereo
    
Input #1, wav, from 'audio.wav':
    
  Metadata:
    
    encoded_by      : Pro Tools
    
    originator_reference: aaOpKJaTN7Nk
    
    date            : 2018-11-08
    
    creation_time   : 13:53:50
    
    time_reference  : 166698000
    
  Duration: 00:00:25.00, bitrate: 2128 kb/s
    
    Stream #1:0: Audio: pcm_s24le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s32 (24 bit), 2116 kb/s
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
  Stream #1:0 -> #0:1 (pcm_s24le (native) -> pcm_s24le (native))
    
Press [q] to stop, [?] for help
    
Output #0, mov, to 'test19.mov':
    
  Metadata:
    
    major_brand     : qt
    
    minor_version   : 537199360
    
    compatible_brands: qt
    
    encoder         : Lavf58.12.100
    
    Stream #0:0(eng): Video: prores (apch / 0x68637061), yuv422p10le(bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 185115 kb/s, 0.04 fps, 25 tbr, 12800 tbn, 25 tbc (default)
    
    Metadata:
    
      creation_time   : 2018-11-06T09:27:43.000000Z
    
      handler_name    : Apple Alias Data Handler
    
      encoder         : Apple ProRes 422 (HQ)
    
      timecode        : 00:00:00:00
    
    Stream #0:1: Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, stereo, s32 (24 bit), 2304 kb/s
    
    Metadata:
    
      encoder         : Lavc58.18.100 pcm_s24le
    
frame=  625 fps=277 q=-1.0 Lsize=  566343kB time=00:00:24.96 bitrate=185876.0kbits/s speed=11.1x
    
video:564928kB audio:1406kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.001496%

    Same error with -map 0:v:0

  • Merging two mp4 videos using ffmpeg

    12 novembre 2018, par kristian zivkovic

    I want to concatenate two mp4 videos using ffmpeg and i am a newbie in this area. I have tried to concat them using several commands and one of them is like this :

    ffmpeg -i "jingle.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts "out/jingle.ts"
    
ffmpeg -i "logo_jingle.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts "out/camera_video.ts"
    

    
ffmpeg -i "concat:out/camera_video.ts|out/jingle.ts" -bsf:a aac_adtstoasc -vcodec output.mp4

    The result is that the second video last for a minute and it shows only black screen and it actually lasts 5 seconds. I also noticed that videos have different parameters so i tried to harmonize some of the parameters but with that the second video is showing but without sound and still lasts a minute.
    Here are the video parameters.
    First :

    ffmpeg version 2.8.15-0ubuntu0.16.04.1 Copyright (c) 2000-2018 the FFmpeg          developers
    
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
    
  configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-     suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu  --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl  --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable- decoder=libschroedinger --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-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --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-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable- libopencv
    
 libavutil      54. 31.100 / 54. 31.100
    
 libavcodec     56. 60.100 / 56. 60.100
    
 libavformat    56. 40.101 / 56. 40.101
    
 libavdevice    56.  4.100 / 56.  4.100
    
 libavfilter     5. 40.101 /  5. 40.101
    
 libavresample   2.  1.  0 /  2.  1.  0
    
 libswscale      3.  1.101 /  3.  1.101
    
 libswresample   1.  2.101 /  1.  2.101
    
 libpostproc    53.  3.100 / 53.  3.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'gajba-1.mp4':
    
 Metadata:
    
major_brand     : isom
    
minor_version   : 512
    
compatible_brands: isomiso2avc1mp41
    
encoder         : Lavf56.40.101
    
  Duration: 00:00:24.32, start: 0.000000, bitrate: 1557 kb/s
    
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,   1280x720 [SAR 1:1 DAR 16:9], 1479 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    
Metadata:
    
  handler_name    : VideoHandler
    
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 16000 Hz, mono, fltp, 87 kb/s (default)
    
Metadata:
    
  handler_name    : SoundHandler

    Second :

    ffmpeg version 2.8.15-0ubuntu0.16.04.1 Copyright (c) 2000-2018 the FFmpeg  developers
    
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
    
  configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build- suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --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- libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --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-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
    
  libavutil      54. 31.100 / 54. 31.100
    
  libavcodec     56. 60.100 / 56. 60.100
    
  libavformat    56. 40.101 / 56. 40.101
    
  libavdevice    56.  4.100 / 56.  4.100
    
  libavfilter     5. 40.101 /  5. 40.101
    
  libavresample   2.  1.  0 /  2.  1.  0
    
  libswscale      3.  1.101 /  3.  1.101
    
  libswresample   1.  2.101 /  1.  2.101
    
  libpostproc    53.  3.100 / 53.  3.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'logo_jingle.mp4':
    
  Metadata:
    
    major_brand     : mp42
    
    minor_version   : 0
    
    compatible_brands: mp42mp41
    
    creation_time   : 2017-03-02 00:49:10
    
  Duration: 00:00:05.44, start: 0.000000, bitrate: 5689 kb/s
    
    Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv),   1280x720 [SAR 1:1 DAR 16:9], 5475 kb/s, 25 fps, 25 tbr, 50k tbn, 50 tbc (default)
    
Metadata:
    
  creation_time   : 2017-03-02 00:49:10
    
  handler_name    : Alias Data Handler
    
  encoder         : AVC Coding
    
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 189 kb/s (default)
    
Metadata:
    
  creation_time   : 2017-03-02 00:49:10
    
  handler_name    : Alias Data Handler

    Can you tell me how to harmonize these videos and merge them in this particular example ?
    Thank you !

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