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  • List of compatible distributions

    26 avril 2011, par

    The table below is the list of Linux distributions compatible with the automated installation script of MediaSPIP. Distribution nameVersion nameVersion number Debian Squeeze 6.x.x Debian Weezy 7.x.x Debian Jessie 8.x.x Ubuntu The Precise Pangolin 12.04 LTS Ubuntu The Trusty Tahr 14.04
    If you want to help us improve this list, you can provide us access to a machine whose distribution is not mentioned above or send the necessary fixes to add (...)

  • 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

  • Submit enhancements and plugins

    13 avril 2011

    If you have developed a new extension to add one or more useful features to MediaSPIP, let us know and its integration into the core MedisSPIP functionality will be considered.
    You can use the development discussion list to request for help with creating a plugin. As MediaSPIP is based on SPIP - or you can use the SPIP discussion list SPIP-Zone.

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  • Ffmpeg performance issue when transcoding to webm

    9 juin 2017, par Algold

    I have recently updated ffmpeg from version 2.0.2 to the most recent release 2.7. I installed it using the same building configuration as the old version and the same codecs version (libvpx and h264). When I tried to transcode an mp4 video to webm, I found out that the speed of the new version is significantly lower (3 times) than the old one. I run this on two identical 8 core machines (Intel(R) Xeon(R) CPU E5-2680 v2 @ 2.80GHz) - OS : Ubuntu 14.04. Below is the command I run :

    /usr/local/bin/ffmpeg -i in.mp4 -f webm -vcodec libvpx -b:v 1000K out.webm

    These are the outputs for the two versions :

    v 2.0.2

    ffmpeg version 2.0.2 Copyright (c) 2000-2013 the FFmpeg developers
    
built on Jan  7 2015 13:51:25 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
    
configuration: --disable-ffplay --disable-ffserver --enable-libxvid --enable-gpl --enable-nonfree --enable-pthreads --enable-libmp3lame --enable-libx264 --enable-libfaac --enable-zlib --enable-avfilter --enable-libfreetype --enable-libfdk_aac --enable-libtheora --enable-libvorbis --enable-libvpx --enable-pic --enable-shared  
    
libavutil      52. 38.100 / 52. 38.100
    
libavcodec     55. 18.102 / 55. 18.102
    
libavformat    55. 12.100 / 55. 12.100
    
libavdevice    55.  3.100 / 55.  3.100
    
libavfilter     3. 79.101 /  3. 79.101
    
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 'in.mp4':
    
Metadata:
    
major_brand     : isom
    
minor_version   : 512
    
compatible_brands: isomiso2avc1mp41
    
encoder         : Lavf55.12.100
    
Duration: 00:00:10.19, start: 0.000000, bitrate: 1724 kb/s
    
Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 1480 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
    
Metadata:
    
  handler_name    : VideoHandler
    
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 253 kb/s
    
Metadata:
    
  handler_name    : SoundHandler
    
[libvpx @ 0x22f3760] v1.3.0
    
Output #0, webm, to 'out.webm':
    
Metadata:
    
major_brand     : isom
    
minor_version   : 512
    
compatible_brands: isomiso2avc1mp41
    
encoder         : Lavf55.12.100
    
Stream #0:0(und): Video: vp8 (libvpx), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 1000 kb/s, 1k tbn, 29.97 tbc
    
Metadata:
    
  handler_name    : VideoHandler
    
Stream #0:1(und): Audio: vorbis (libvorbis), 44100 Hz, stereo, fltp
    
Metadata:
    
  handler_name    : SoundHandler
    
Stream mapping:
    
Stream #0:0 -> #0:0 (h264 -> libvpx)
    
Stream #0:1 -> #0:1 (aac -> libvorbis)
    
Press [q] to stop, [?] for help
    
frame=  302 fps= 23 q=0.0 Lsize=    1445kB time=00:00:10.18 bitrate=1161.9kbits/s    
    
video:1304kB audio:128kB subtitle:0 global headers:4kB muxing overhead 0.644833%

    v 2.7

    ffmpeg version 2.7 Copyright (c) 2000-2015 the FFmpeg developer built with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
    
  configuration: --disable-ffplay --disable-ffserver --enable-libxvid --enable-gpl --enable-nonfree --enable-libmp3lame --enable-libx264 --enable-libfaac --enable-zlib --enable-libass --enable-pthreads --enable-avfilter --enable-libfreetype --enable-libfdk_aac --enable-libtheora --enable-libvorbis --enable-libvpx --enable-pic --enable-shared --enable-openssl
    
  libavutil      54. 27.100 / 54. 27.100
    
  libavcodec     56. 41.100 / 56. 41.100
    
  libavformat    56. 36.100 / 56. 36.100
    
  libavdevice    56.  4.100 / 56.  4.100
    
  libavfilter     5. 16.101 /  5. 16.101
    
  libswscale      3.  1.101 /  3.  1.101
    
  libswresample   1.  2.100 /  1.  2.100
    
  libpostproc    53.  3.100 / 53.  3.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'in.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf56.36.100
    
  Duration: 00:00:10.19, start: 0.000000, bitrate: 1596 kb/s
    
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 1480 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
[libvpx @ 0xfe4640] v1.3.0
    
Output #0, webm, to 'out.webm':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf56.36.100
    
    Stream #0:0(und): Video: vp8 (libvpx), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 1000 kb/s, 29.97 fps, 1k tbn, 29.97 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
      encoder         : Lavc56.41.100 libvpx
    
    Stream #0:1(und): Audio: vorbis (libvorbis), 44100 Hz, stereo, fltp (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
      encoder         : Lavc56.41.100 libvorbis
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (h264 (native) -> vp8 (libvpx))
    
  Stream #0:1 -> #0:1 (aac (native) -> vorbis (libvorbis))
    
Press [q] to stop, [?] for help
    
frame=  302 fps=8.3 q=0.0 Lsize=    1410kB time=00:00:10.18 bitrate=1133.4kbits/s    
    
video:1274kB audio:123kB subtitle:0kB other streams:0kB global headers:4kB muxing overhead: 0.909304%

    I tried ffmpeg 2.6.3 and the performance the same as for 2.7. Also it looks like when I transcode webm to mp4 2.7 is 30% faster than webm.

    I tried to look if there are building configuration options for the new version but couldn’t find anything.

    Can anyone suggest a possible reason for the worse speed performance of the new version when transcoding to webm ?

  • build : Allow generating dependencies as a side-effect of assembling

    13 octobre 2016, par Diego Biurrun
    build : Allow generating dependencies as a side-effect of assembling

    (Cherry-picked from libav commit 3c0efbd03349ae68d3a25a082222652a102e3fd4)
    

    Signed-off-by : James Almer <jamrial@gmail.com>
    • [DH] configure
    • [DH] ffbuild/common.mak

  • Add support for levels 6, 6.1, and 6.2

    15 février 2017, par Henrik Gramner
    Add support for levels 6, 6.1, and 6.2

    These levels were added in the 2016-10 revision of the H.264 specification and
    
improves support for content with high resolutions and/or high frame rates.
    

    Level 6.2 supports 8K resolution at 120 fps.
    

    Also shrink the x264_levels array by using smaller data types.
    • [DH] common/common.c
    • [DH] encoder/encoder.c
    • [DH] encoder/ratecontrol.c
    • [DH] encoder/set.c
    • [DH] tools/checkasm.c
    • [DH] x264.h

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