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  • Keeping control of your media in your hands

    13 avril 2011, par

    The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
    While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
    MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
    MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)

  • Des sites réalisés avec MediaSPIP

    2 mai 2011, par

    Cette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
    Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page.

  • Changer son thème graphique

    22 février 2011, par

    Le thème graphique ne touche pas à la disposition à proprement dite des éléments dans la page. Il ne fait que modifier l’apparence des éléments.
    Le placement peut être modifié effectivement, mais cette modification n’est que visuelle et non pas au niveau de la représentation sémantique de la page.
    Modifier le thème graphique utilisé
    Pour modifier le thème graphique utilisé, il est nécessaire que le plugin zen-garden soit activé sur le site.
    Il suffit ensuite de se rendre dans l’espace de configuration du (...)

Sur d’autres sites (11847)

  • Error in ffmpeg conversion

    9 avril 2015, par Adam Mo.

    I have a VPS 1G RAM with CentOS 6 i386 minimal installed and installed ffmpeg by ffmpeginstaller.com to setup clipbucket 2.7 in the VPS.
    when I test the ffmpeg by this command :

    wget "http://mirrorblender.top-ix.org/peach/bigbuckbunny_movies/big_buck_bunny_720p_surround.avi"
    
ffmpeg -i big_buck_bunny_720p_surround.avi -vcodec libx264 big_buck_bunny_720p_surround-H264.avi

    by following this tutorial I get error
    the output :

    ffmpeg version N-71343-g32e06c4-syslint Copyright (c) 2000-2015 the FFmpeg     developers
    
  built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-11)
    
  configuration: --prefix=/usr/local/cpffmpeg --enable-shared --enable-nonfree --enable-gpl --enable-pthreads --enable-libopencore-amrnb --enable-decoder=liba52 --enable-libopencore-amrwb --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --extra-cflags=-    I/usr/local/cpffmpeg/include/ --extra-ldflags=-L/usr/local/cpffmpeg/lib --enable-    version3 --extra-version=syslint
    
  libavutil      54. 22.101 / 54. 22.101
    
  libavcodec     56. 34.100 / 56. 34.100
    
  libavformat    56. 30.100 / 56. 30.100
    
  libavdevice    56.  4.100 / 56.  4.100
    
  libavfilter     5. 13.101 /  5. 13.101
    
  libswscale      3.  1.101 /  3.  1.101
    
  libswresample   1.  1.100 /  1.  1.100
    
  libpostproc    53.  3.100 / 53.  3.100
    
Input #0, avi, from 'big_buck_bunny_720p_surround.avi':
    
  Metadata:
    
    encoder         : AVI-Mux GUI 1.17.7, Aug  8 2006  20:59:17
    
    JUNK            :
    
  Duration: 00:09:56.46, start: 0.000000, bitrate: 4456 kb/s
    
    Stream #0:0: Video: mpeg4 (Simple Profile) (FMP4 / 0x34504D46), yuv420p,     1280x720 [SAR 1:1 DAR 16:9], 4001 kb/s, 24 fps, 24 tbr, 24 tbn, 24 tbc
    
    Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, 5.1(side), fltp, 448 kb/s
    
    Metadata:
    
      title           : BBB-Master
    
[libx264 @ 0x9360de0] using SAR=1/1
    
[libx264 @ 0x9360de0] using cpu capabilities: none!
    
x264 [error]: malloc of size 5258784 failed
    
Output #0, avi, to 'big_buck_bunny_720p_surround-H264.avi':
    
  Metadata:
    
    encoder         : AVI-Mux GUI 1.17.7, Aug  8 2006  20:59:17
    
    JUNK            :
    
    Stream #0:0: Video: h264, none, q=2-31, 128 kb/s, SAR 1:1 DAR 0:0, 24 fps
    
    Metadata:
    
      encoder         : Lavc56.34.100 libx264
    
    Stream #0:1: Audio: mp3, 0 channels, 128 kb/s
    
    Metadata:
    
      title           : BBB-Master
    
      encoder         : Lavc56.34.100 libmp3lame
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (mpeg4 (native) -> h264 (libx264))
    
  Stream #0:1 -> #0:1 (ac3 (native) -> mp3 (libmp3lame))
    
Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

    I don’t know what the problem, can any one help me ?

  • checkasm : use perf API on Linux ARM*

    1er septembre 2017, par Clément Bœsch
    checkasm : use perf API on Linux ARM*

    On ARM platforms, accessing the PMU registers requires special user
    
access permissions. Since there is no other way to get accurate timers,
    
the current implementation of timers in FFmpeg rely on these registers.
    
Unfortunately, enabling user access to these registers on Linux is not
    
trivial, and generally involve compiling a random and unreliable github
    
kernel module, or patching somehow your kernel.
    

    Such module is very unlikely to reach the upstream anytime soon. Quoting
    
Robin Murphin from ARM :
    

    > Say you do give userspace direct access to the PMU ; now run two or more
    
> programs at once that believe they can use the counters for their own
    
> "minimal-overhead" profiling. Have fun interpreting those results...
    
>
    
> And that's not even getting into the implications of scheduling across
    
> different CPUs, CPUidle, etc. where the PMU state is completely beyond
    
> userspace's control. In general, the plan to provide userspace with
    
> something which might happen to just about work in a few corner cases,
    
> but is meaningless, misleading or downright broken in all others, is to
    
> never do so.
    

    As a result, the alternative is to use the Performance Monitoring Linux
    
API which makes use of these registers internally (assuming the PMU of
    
your ARM board is supported in the kernel, which is definitely not a
    
given...).
    

    While the Linux API is obviously cross platform, it does have a
    
significant overhead which needs to be taken into account. As a result,
    
that mode is only weakly enabled on ARM platforms exclusively.
    

    Note on the non flexibility of the implementation : the timers (native
    
FFmpeg vs Linux API) are selected at compilation time to prevent the
    
need of function calls, which would result in a negative impact on the
    
cycle counters.
    • [DH] configure
    • [DH] tests/checkasm/checkasm.c
    • [DH] tests/checkasm/checkasm.h

  • mpegvideo : Expand macro

    10 juin 2015, par Vittorio Giovara
    mpegvideo : Expand macro

    Having this macro in an header only facilitates the use of such header.
    
The code increase is minimal and files have one less dependency
    
on mpegvideo.h.
    • [DBH] libavcodec/flvenc.c
    • [DBH] libavcodec/h261enc.c
    • [DBH] libavcodec/mpegvideo.h
    • [DBH] libavcodec/mpegvideo_enc.c
    • [DBH] libavcodec/rv10enc.c
    • [DBH] libavcodec/rv20enc.c

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