Recherche avancée

Médias (1)

Mot : - Tags -/copyleft

Autres articles (66)

  • Participer à sa traduction

    10 avril 2011

    Vous pouvez nous aider à améliorer les locutions utilisées dans le logiciel ou à traduire celui-ci dans n’importe qu’elle nouvelle langue permettant sa diffusion à de nouvelles communautés linguistiques.
    Pour ce faire, on utilise l’interface de traduction de SPIP où l’ensemble des modules de langue de MediaSPIP sont à disposition. ll vous suffit de vous inscrire sur la liste de discussion des traducteurs pour demander plus d’informations.
    Actuellement MediaSPIP n’est disponible qu’en français et (...)

  • Les autorisations surchargées par les plugins

    27 avril 2010, par

    Mediaspip core
    autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs

  • Le plugin : Podcasts.

    14 juillet 2010, par

    Le problème du podcasting est à nouveau un problème révélateur de la normalisation des transports de données sur Internet.
    Deux formats intéressants existent : Celui développé par Apple, très axé sur l’utilisation d’iTunes dont la SPEC est ici ; Le format "Media RSS Module" qui est plus "libre" notamment soutenu par Yahoo et le logiciel Miro ;
    Types de fichiers supportés dans les flux
    Le format d’Apple n’autorise que les formats suivants dans ses flux : .mp3 audio/mpeg .m4a audio/x-m4a .mp4 (...)

Sur d’autres sites (13426)

  • CLSID for x264 DirectShow filter

    12 mai 2012, par meghana

    I have used x264 DirectShow filter from Monogram for decoding h264 avc video , i need to create intrance and add filter to graph in directshow , i checked the CLSID of it from grapthEdit , and that is 'x264' , i guess that to create instance we need the GUID for that filter , i have no clue how can i create filter instance using 'x264' value.

    I am using directshow with vc++

    Can any body have idea on this ???

  • ARM compiler shoot-out, round 2

    http://samples.ffmpeg.org/V-codecs/h264/cathedral-beta2-400extra-crop-avc.mp4 http://samples.ffmpeg.org/V-codecs/h264/NeroAVC.mp4 http://samples.ffmpeg.org/V-codecs/h264/indiana_jones_4-tlr3_h640w.mov http://samples.ffmpeg.org/MPEG-4/NeroRecodeSample-MP4/NeroRecodeSample.mp4 http://samples.ffmpeg.org/A-codecs/MP3/Silent_Light.mp3 http://samples.ffmpeg.org/A-codecs/vorbis/Lumme-Badloop.ogg
    20 août 2009, par Mans — ARM, Compilers

    In my recent test of ARM compilers, I had to leave out Texas Instrument’s compiler since it failed to build FFmpeg. Since then, the TI compiler team has been busy fixing bugs, and a snapshot I was given to test was able to build enough of a somewhat patched FFmpeg that I can now present round two in this shoot-out.

    The contenders this time were the fastest GCC variant from round one, ARM RVCT, and newcomer TI TMS470. With the same rules as last time, the exact versions and optimisation options were like this :

    • CodeSourcery GCC 2009q1 (based on 4.3.3), -mfpu=neon -mfloat-abi=softfp -mcpu=cortex-a8 -std=c99 -fomit-frame-pointer -O3 -fno-math-errno -fno-signed-zeros -fno-tree-vectorize
    • ARM RVCT 4.0 Build 591, -mfpu=neon -mfloat-abi=softfp -mcpu=cortex-a8 -std=c99 -fomit-frame-pointer -O3 -fno-math-errno -fno-signed-zeros
    • TI TMS470 4.7.0-a9229, --float_support=vfpv3 -mv=7a8 -O3 -mf=5


    To keep things fair, I left the vectoriser off also with the TI compiler. The table below lists the decoding times for the sample files, this time normalised against the participating GCC compiler. Remember, smaller numbers are better. Also keep in mind that this test was done with a development snapshot of TMS470, not an approved release.

    Sample name Codec Code type GCC RVCT TI
    cathedral H.264 CABAC integer 1.00 0.95 1.02
    NeroAVC H.264 CABAC integer 1.00 0.96 1.05
    indiana_jones_4 H.264 CAVLC integer 1.00 0.92 1.02
    NeroRecodeSample MPEG-4 ASP integer 1.00 1.01 1.08
    Silent_Light MP3 64-bit integer 1.00 0.48 0.72
    When_I_Grow_Up FLAC integer 1.00 0.87 0.93
    Lumme-Badloop Vorbis float 1.00 0.94 1.05
    Canyon AC-3 float 1.00 0.88 1.01
    lotr DTS float 1.00 1.00 1.08

    Overall, the TI TMS470 compiler comes off slightly worse than GCC. In two cases, however, it was significantly better than GCC, but not as good as RVCT. Incidentally, those were also the ones where RVCT scored the biggest win over GCC.

    My conclusions from this test are twofold :

    • ARM’s own compiler is very hard to beat. They do seem to know how their chips work.
    • GCC is incredibly bad at 64-bit arithmetic on 32-bit machines.

    The logical next step is to test these compilers with vectorisation enabled. FFmpeg should offer plenty of opportunities for this feature to shine. Unfortunately, that test will have to wait until the RVCT vectoriser is fixed. The current release does not compile FFmpeg with vectorisation enabled.

  • How to decompress a compressed type audio file using ffmpeg ?

    28 janvier 2017, par iPhoneDev

    I need to decompress an audio file through code using ffmpeg.
    I have compiled FFMPEG for iOS with the link : http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2009-October/076618.html

    Now I am not getting how to include ffmpeg in my xcode project ? Which ffmpeg libraries to use ?
    Which methods to use for decompresson ?

    Please answer.

Navigation