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  • 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

  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
    The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
    For older browsers the Flowplayer flash fallback is used.
    MediaSPIP allows for media playback on major mobile platforms with the above (...)

  • 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" (...)

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  • configure : memalign is broken on djgpp 2.05

    13 novembre 2018, par Peter Ross
    configure : memalign is broken on djgpp 2.05

    djgpp 2.05 finally provides posix-compatible memalign, but it is broken,
    
so use malloc instead.
    

    discussion : http://www.delorie.com/archives/browse.cgi?p=djgpp/2017/12/29/16:26:58
    • [DH] configure

  • Video files are not opening for sample applications in Info Sphere Streams

    10 mars 2017, par Pavan Kumar

    I am new to IBM Info Sphere Streams, I read an article which says IBM Info Sphere streams is capable of doing Image processing. After some research I got to know that, we have to install OpenCV and FFMpeg lybraries with its dependecies. I have installed all of them and tried sample applications. I can run applications which contains Images as input, but when it comes to processing with videos it’s not working. I am unable to use x11viewer operator as well. I am getting the following error while working with sample videos.

    (Streams com.ibm.streamsx.opencv::X11Viewer operator:7889): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed
    
28 Feb 2017 14:00:34.672 [7889] ERROR #splapptrc,J[0],P[0],vid0,spl_pe M[PEImpl.cpp:process:1270]  - CDISR5079E: An exception occurred during the processing of the processing element. The error is: Unable to open camera {0}.

    I did not install any GPU device drivers here but when I used the following commands I am getting results like below,

    [streamsadmin@streamsqse output]$ lspci | grep VGA
    
00:0f.0 VGA compatible controller: VMware SVGA II Adapter
    

    
[streamsadmin@streamsqse output]$ find /dev -group video
    
/dev/fb0
    
/dev/dri/card0
    
/dev/dri/renderD128
    
/dev/dri/controlD64
    
/dev/agpgart

    and

    glxinfo | grep -i vendor
    
server glx vendor string: SGI
    
client glx vendor string: Mesa Project and SGI
    
OpenGL vendor string: VMware, Inc

    My doubt here is, whether I have installed GPU Drivers properly or do I need to install them again ? Can anyone help me to resolve this issue.

    And I am unable to open those videos by using any player as well.

  • Concatenate mp4 video files on iOS using Libavformat

    3 mars 2017, par Felix

    I need to merge (i.e. concatenate) multiple video files (using H.264 codec) in an iOS application. The problem is I can’t use AVFoundation because it can’t handle the video format on iOS (no problem on MacOS). So I tried to use the FFmpeg library, specifically Libavformat for this task. I found C code that looks useful here : http://stackoverflow.com/a/16293046. But i can’t get it to work and don’t understand it completly. The output video file appears to play only black frames. I’m using the precompiled libraries from the FFmpeg CocoaPod.

    I was able to convert a single test video (which has 1GB) using the command line tool on my Mac :

    $ ffmpeg -i input.mp4 -vcodec copy output.mp4
    
ffmpeg version 3.2.4-tessus Copyright (c) 2000-2017 the FFmpeg developers
    
  built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
    
  configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl --enable-libass --enable-libbluray --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopus --enable-libschroedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzmq --enable-version3 --disable-ffplay --disable-indev=qtkit --disable-indev=x11grab_xcb
    
  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
    
  libswscale      4.  2.100 /  4.  2.100
    
  libswresample   2.  3.100 /  2.  3.100
    
  libpostproc    54.  1.100 / 54.  1.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':
    
  Metadata:
    
    major_brand     : mp42
    
    minor_version   : 0
    
    compatible_brands: mp42mp41isomiso2
    
    creation_time   : 2016-09-14T14:35:53.000000Z
    
  Duration: 00:04:32.29, start: 0.000000, bitrate: 30013 kb/s
    
    Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 29958 kb/s, 50 fps, 50 tbr, 5k tbn, 100 tbc (default)
    
    Metadata:
    
      creation_time   : 2016-09-14T14:35:53.000000Z
    
      handler_name    : VideoHandler
    
    Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
    
    Metadata:
    
      creation_time   : 2016-09-14T14:35:53.000000Z
    
      handler_name    : SoundHandler
    
Output #0, mp4, to 'output.mp4':
    
  Metadata:
    
    major_brand     : mp42
    
    minor_version   : 0
    
    compatible_brands: mp42mp41isomiso2
    
    encoder         : Lavf57.56.101
    
    Stream #0:0(eng): Video: h264 (Main) ([33][0][0][0] / 0x0021), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 29958 kb/s, 50 fps, 50 tbr, 10k tbn, 5k tbc (default)
    
    Metadata:
    
      creation_time   : 2016-09-14T14:35:53.000000Z
    
      handler_name    : VideoHandler
    
    Stream #0:1(eng): Audio: aac (LC) ([64][0][0][0] / 0x0040), 48000 Hz, stereo, fltp, 128 kb/s (default)
    
    Metadata:
    
      creation_time   : 2016-09-14T14:35:53.000000Z
    
      handler_name    : SoundHandler
    
      encoder         : Lavc57.64.101 aac
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
    
Press [q] to stop, [?] for help
    
frame=13577 fps=1280 q=-1.0 Lsize=  997604kB time=00:04:32.28 bitrate=30013.7kbits/s speed=25.7x    
    
video:993034kB audio:4268kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.030246%
    
[aac @ 0x7fa849809e00] Qavg: 942.999

    This process is very fast (10 seconds) and I can play the resulting video on iOS using AVFoundation frameworks. If i could do the same for each input video using Libavformat in my iOS app i could solve my problem by merging the videos in a second step using AVAssetExportSession.

    Any help is appreciated.

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