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  • Gestion des droits de création et d’édition des objets

    8 février 2011, par

    Par défaut, beaucoup de fonctionnalités sont limitées aux administrateurs mais restent configurables indépendamment pour modifier leur statut minimal d’utilisation notamment : la rédaction de contenus sur le site modifiables dans la gestion des templates de formulaires ; l’ajout de notes aux articles ; l’ajout de légendes et d’annotations sur les images ;

  • Dépôt de média et thèmes par FTP

    31 mai 2013, par

    L’outil MédiaSPIP traite aussi les média transférés par la voie FTP. Si vous préférez déposer par cette voie, récupérez les identifiants d’accès vers votre site MédiaSPIP et utilisez votre client FTP favori.
    Vous trouverez dès le départ les dossiers suivants dans votre espace FTP : config/ : dossier de configuration du site IMG/ : dossier des média déjà traités et en ligne sur le site local/ : répertoire cache du site web themes/ : les thèmes ou les feuilles de style personnalisées tmp/ : dossier de travail (...)

  • Mise à jour de la version 0.1 vers 0.2

    24 juin 2013, par

    Explications des différents changements notables lors du passage de la version 0.1 de MediaSPIP à la version 0.3. Quelles sont les nouveautés
    Au niveau des dépendances logicielles Utilisation des dernières versions de FFMpeg (>= v1.2.1) ; Installation des dépendances pour Smush ; Installation de MediaInfo et FFprobe pour la récupération des métadonnées ; On n’utilise plus ffmpeg2theora ; On n’installe plus flvtool2 au profit de flvtool++ ; On n’installe plus ffmpeg-php qui n’est plus maintenu au (...)

Sur d’autres sites (13587)

  • Extracting metadata from incomplete video files

    17 juillet 2013, par npgall

    Can anyone tell me where metadata is stored in common video file formats ? And if it would be located towards the start of the file, or scattered throughout.

    I'm working with a remote object store containing a lot of video files and I want to extract metadata, in particular video duration and video dimensions from those files, without streaming the entire file contents to the local machine.

    I'm hoping that this metadata will be stored in the first X bytes of files, and so I can just fetch a byte range starting at the beginning instead of the whole file, passing this partial file data to ffprobe.

    For testing purposes I created a 22MB MP4 file, and used the following command to supply only the first 1MB of data to ffprobe :

    head -c1024K '2013-07-04 12.20.07.mp4' | ffprobe -

    It prints :

    avprobe version 0.8.6-4:0.8.6-0ubuntu0.12.04.1, Copyright (c) 2007-2013 the Libav developers
    
  built on Apr  2 2013 17:02:36 with gcc 4.6.3
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x1a6b7a0] stream 0, offset 0x10beab: partial file
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'pipe:':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 0
    
    compatible_brands: isom3gp4
    
    creation_time   : 1947-07-04 11:20:07
    
  Duration: 00:00:09.84, start: 0.000000, bitrate: N/A
    
    Stream #0.0(eng): Video: h264 (High), yuv420p, 1920x1080, 20028 kb/s, PAR 65536:65536 DAR 16:9, 29.99 fps, 30 tbr, 90k tbn, 180k tbc
    
    Metadata:
    
      creation_time   : 1947-07-04 11:20:07
    
    Stream #0.1(eng): Audio: aac, 48000 Hz, stereo, s16, 189 kb/s
    
    Metadata:
    
      creation_time   : 1947-07-04 11:20:07

    So I see the first 1MB was enough to extract video duration 9.84 seconds and video dimensions 1920x1080, even though ffprobe printed the warning about detecting a partial file. If I supply less than 1MB, it fails completely.

    Would this approach work for other common video file formats to reliably extract metadata, or do any common formats scatter metadata throughout the file ?

    I'm aware of the concept of container formats and that various codecs may be used represent the audio/video data inside those containers. I'm not familiar with the details though. So I guess the question may apply to common combinations of containers + codecs ? Thanks in advance.

  • I have failed the make of Android-FFmpeg-Android

    5 juillet 2013, par Tsurumaru Makoto

    I am having trouble compiling Android-FFmpeg-Android with make command.

    I'm using the ndk : android-ndk-r8e-linux-x86.tar.bz2 and I have ffmpeg installed on my machine :

    [root@sv　ffmpeg]#cat /proc/version
    
Linux version 2.6.18-8.1.14.el5 (brewbuilder@hs20-bc2-2.build.redhat.com)
    
 (gcc version 4.1.1 20070105 (Red Hat 4.1.1-52)) #1 SMP Tue Sep 25 11:45:53 EDT 2007
    

    
[root@sv ffmpeg]# ffmpeg
    
FFmpeg version SVN-r26402, Copyright (c) 2000-2011 the FFmpeg developers
    
  built on Jul  5 2013 11:45:24 with gcc 4.1.2 20080704 (Red Hat 4.1.2-54)
    
  configuration: --enable-shared --enable-gpl --enable-version3 --enable-nonfree --enable-postproc --enable-x11grab --enable-libfaac --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-libvpx --enable-pic
    
  libavutil     50.36. 0 / 50.36. 0
    
  libavcore      0.16. 1 /  0.16. 1
    
  libavcodec    52.108. 0 / 52.108. 0
    
  libavformat   52.93. 0 / 52.93. 0
    
  libavdevice   52. 2. 3 / 52. 2. 3
    
  libavfilter    1.74. 0 /  1.74. 0
    
  libswscale     0.12. 0 /  0.12. 0
    
  libpostproc   51. 2. 0 / 51. 2. 0
    
Hyper fast Audio and Video encoder
    
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...
    

    
Use -h to get full help or, even better, run 'man ffmpeg'

    I'm using following repository : https://github.com/chu888chu888/Android-FFmpeg-Android

    Where I get :

    [homepage@sv FFmpeg-Android-master]$ ./FFmpeg-Android.sh
    

    
/tmp/vplayer/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/as: /lib/libz.so.1: no version information available (required by
    
/tmp/vplayer/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/as)
    
LD libavutil/libavutil.so.51
    
/tmp/vplayer/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: error: cannot open /tmp/vplayer/bin/../sysroot/usr/lib/libm.so: Unknown error 530
    
/tmp/vplayer/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: error: cannot open /tmp/vplayer/bin/../sysroot/usr/lib/libz.so: Unknown error 530
    
/tmp/vplayer/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: error: cannot open /tmp/vplayer/bin/../lib/gcc/arm-linux-androideabi/4.6/libgcc.a: Unknown error 530
    
/tmp/vplayer/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: error: cannot open /tmp/vplayer/bin/../sysroot/usr/lib/libc.so: Unknown error 530
    
/tmp/vplayer/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: error: cannot open /tmp/vplayer/bin/../sysroot/usr/lib/libdl.so: Unknown error 530
    
/tmp/vplayer/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: error: cannot open /tmp/vplayer/bin/../lib/gcc/arm-linux-androideabi/4.6/libgcc.a: Unknown error 530
    
collect2: ld returned 1 exit status
    
make: *** [libavutil/libavutil.so.51] Error 1

    It is an error.

    [homepage@sv FFmpeg-Android-master]$ ls /tmp/vplayer/sysroot/usr/lib
    
crtbegin_dynamic.o  libEGL.so        libandroid.so      liblog.so     libthread_db.so
    
crtbegin_so.o       libGLESv1_CM.so  libc.a             libm.a        libz.so
    
crtbegin_static.o   libGLESv2.so     libc.so            libm.so
    
crtend_android.o    libOpenMAXAL.so  libdl.so           libstdc++.a
    
crtend_so.o         libOpenSLES.so   libjnigraphics.so  libstdc++.so

    You can see that file is present. Can anyone advice a solution to this issue ?

  • How to concatenate two videos w. ffmpeg — documented code not working

    2 mars 2014, par Jim Miller

    I'm trying to concatenate two videos with ffmpeg. Nothing fancy ; I just want one video that consists of video A immediately followed by video B.

    I've tried the code from How to concatenate (join, merge) media files on a freshly built and otherwise-working-fine install of ffmpeg 1.2.1 on Fedora 17, but the following error message appears :

    $ ffmpeg -i video_a.mov -i video_b.mov -filter_complex '[0:0] [0:1] [1:0] [1:1] concat=n=2:v=1:a=1 [v] [a]' -map '[v]' -map '[a]' output.mp4
    

    
ffmpeg version N-54271-g7f866c1 Copyright (c) 2000-2013 the FFmpeg developers
    
  built on Jun 29 2013 11:05:42 with gcc 4.7.2 (GCC) 20120921 (Red Hat 4.7.2-2)
    
  configuration: --enable-gpl --enable-nonfree --enable-pthreads --enable-libx264 --enable-libfaac --extra-cflags=-I/usr/local/include --extra-ldflags=-L/usr/local/lib
    
  libavutil      52. 37.101 / 52. 37.101
    
  libavcodec     55. 17.100 / 55. 17.100
    
  libavformat    55. 10.100 / 55. 10.100
    
  libavdevice    55.  2.100 / 55.  2.100
    
  libavfilter     3. 77.101 /  3. 77.101
    
  libswscale      2.  3.100 /  2.  3.100
    
  libswresample   0. 17.102 /  0. 17.102
    
  libpostproc    52.  3.100 / 52.  3.100
    

    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'v1221-MTQxMzcyNTIxODU2.mov':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 0
    
    compatible_brands: qt  
    
    creation_time   : 2013-03-28 20:34:59
    
    encoder         : Mac OS X v10.8.3 (CMA 914, CM 926.87, x86_64)
    
    encoder-eng     : Mac OS X v10.8.3 (CMA 914, CM 926.87, x86_64)
    
  Duration: 00:00:05.34, start: 0.000000, bitrate: 15837 kb/s
    
    Stream #0:0(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 221 kb/s
    
    Metadata:
    
      creation_time   : 2013-03-28 20:34:59
    
      handler_name    : Core Media Data Handler
    
    Stream #0:1(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 15512 kb/s, 29.81 fps, 30 tbr, 600 tbn, 1200 tbc
    
    Metadata:
    
      creation_time   : 2013-03-28 20:34:59
    
      handler_name    : Core Media Data Handler
    

    
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'v1224-MTQxMzcyNTIxODg5.mov':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 0
    
    compatible_brands: qt  
    
    creation_time   : 2013-03-28 20:36:28
    
    encoder         : Mac OS X v10.8.3 (CMA 914, CM 926.87, x86_64)
    
    encoder-eng     : Mac OS X v10.8.3 (CMA 914, CM 926.87, x86_64)
    
  Duration: 00:00:04.13, start: 0.000000, bitrate: 15689 kb/s
    
    Stream #1:0(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 221 kb/s
    
    Metadata:
    
      creation_time   : 2013-03-28 20:36:28
    
      handler_name    : Core Media Data Handler
    
    Stream #1:1(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 15446 kb/s, 29.79 fps, 30 tbr, 600 tbn, 1200 tbc
    
    Metadata:
    
      creation_time   : 2013-03-28 20:36:28
    
      handler_name    : Core Media Data Handler
    

    
Stream specifier ':0' in filtergraph description [0:0] [0:1] [1:0] [1:1] concat=n=2:v=1:a=1 [v] [a] matches no streams.

    A few other things to note :

    • The two videos I'm working with were shot with the same camera, so there shouldn't be any problems with aspect ratio or other gory video details.
    • I'm able to do other things with my ffmpeg installation, like convert one of those videos from .mov to .mp4 (yes, I had to recompile with faac...), which seems to vouch for both the ffmpeg and the video.
    • I've tried modifying the above invocation to produce a .mov file at the end, but I get the same error as before.
    • I've tried some stupid hacking tricks on the request above, like concatenating two copies of the same video, as well as some other invocations from other places around the web that involve filter_complex. Even on ones that were cited as working, I get the "matches no streams" message.

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