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Autres articles (36)

  • Gestion générale des documents

    13 mai 2011, par

    MédiaSPIP ne modifie jamais le document original mis en ligne.
    Pour chaque document mis en ligne il effectue deux opérations successives : la création d’une version supplémentaire qui peut être facilement consultée en ligne tout en laissant l’original téléchargeable dans le cas où le document original ne peut être lu dans un navigateur Internet ; la récupération des métadonnées du document original pour illustrer textuellement le fichier ;
    Les tableaux ci-dessous expliquent ce que peut faire MédiaSPIP (...)

  • 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.

  • 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 (...)

Sur d’autres sites (6192)

  • accelerate x264 encoding

    7 août 2012, par Saraswati

    i am making use of x264 to encode raw data captured from the iphone camera .. but the encoding is very slow .Can anyone help me accelerate the encoding speed.

    I have used following settings to build x264 lib :

    //for armv6

    CC=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc ./configure —host=arm-apple-darwin —sysroot=/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk —prefix='dist' —extra-cflags='-arch armv6' —extra-ldflags=-L/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk/usr/lib/system/ —extra-ldflags='-arch armv6' —enable-pic —disable-asm

    //for armv7

    CC=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc ./configure —host=arm-apple-darwin —sysroot=/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk —prefix='dist' —extra-cflags='-arch armv7' —extra-ldflags=-L/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk/usr/lib/system/ —extra-ldflags='-arch armv7' —enable-pic

    I am using default preset like this :

    x264_param_default_preset(param, "slow", "zerolatency");

    and setting few perameters :

    param->i_bframe = 0;
    
param->analyse.i_me_method = X264_ME_HEX;
    
param->analyse.i_subpel_refine = 2;
    
param->i_frame_reference = 1;
    
param->analyse.b_mixed_references = 0;
    
param->analyse.i_trellis = 0;
    
param->rc.b_mb_tree = 0;
    
param->analyse.i_weighted_pred = X264_WEIGHTP_NONE;
    

    

    
param->rc.i_bitrate = 180;
    
param->rc.i_qp_min = 20; 
    
param->rc.i_qp_max = 26; 
    

    
param->i_keyint_max = 15; 
    
param->i_keyint_min = 15;
    

    

    
param->i_width = w;
    
param->i_height = h;
    

    
x264_param_apply_profile(param, "baseline");
    
x264_picture_alloc( &(enc->pic), X264_CSP_I420, param->i_width, param->i_height );

  • iFrameExtractor fails to build library for armv7 using XCode 4.3.3 & iOS 5.1

    16 mars 2013, par Rajat Lala

    I have downloaded code to build with XCode 4.3.3 for iOS 5.1 from this link - https://github.com/lajos/iFrameExtractor
    I am successfully able to build the libraries for FFmpeg using build_universal script. But it always builds the libraries for X86_64 architecture. Checked with lipo -info command.

    Also tried the build script from the link - http://stexgroup.com/blog/ffmpeg-for-iphone-ios-xcode4.3-build-script. It also builds libraries for X86_64 architecture.

    I changed the scripts as per this post - problem compiling ffmpeg for iFrameExtractor

    But nothing is working for me.

    The build script for armv7 [iFrameExtractor] is as following

    ./configure \
    
--disable-bzlib --disable-doc \
    
--disable-ffmpeg --disable-ffplay \
    
--disable-ffserver --disable-mmx \
    
--cc=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc \
    
--as='gas-preprocessor/gas-preprocessor.pl /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc' \
    
--enable-cross-compile --target-os=darwin \
    
--arch=arm --cpu=cortex-a8 --enable-pic \
    
--sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.1.sdk \
    
--extra-ldflags="-arch armv7 -    L//Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.1.sdk/usr/lib" \
    
--extra-cflags="-arch armv7"

    Can anybody guide me what can be the issue, considering the same thing is working for everyone else ?

  • Using ffmpeg to convert flv to mp4 on debian 6 [closed]

    28 mars 2013, par user1542610

    I am using ffmpeg on debian version squeeze/sid to convert flv to mp4.I need to view final output on iphone, ipad. I have tried many different combinations but have not succeeded in converting the file properly.

    Information about the sample flv file is as follows - via command ffmpeg -i sample.flv

      FFmpeg version SVN-r0.5.9-4:0.5.9-0ubuntu0.10.04.1, Copyright (c) 2000-2009 Fabrice Bellard, et al.
    
  configuration: --extra-version=4:0.5.9-0ubuntu0.10.04.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --disable-stripping --disable-vhook --enable-runtime-cpudetect --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --enable-shared --disable-static
    
  libavutil     49.15. 0 / 49.15. 0
    
  libavcodec    52.20. 1 / 52.20. 1
    
  libavformat   52.31. 0 / 52.31. 0
    
  libavdevice   52. 1. 0 / 52. 1. 0
    
  libavfilter    0. 4. 0 /  0. 4. 0
    
  libswscale     0. 7. 1 /  0. 7. 1
    
  libpostproc   51. 2. 0 / 51. 2. 0
    
  built on Jun 12 2012 16:27:59, gcc: 4.4.3
    
Input #0, flv, from 'sample.flv':
    
  Duration: 00:01:06.90, start: 2.079000, bitrate: N/A
    
    Stream #0.0: Video: flv, yuv420p, 352x200, 1k tbr, 1k tbn, 1k tbc
    
    Stream #0.1: Audio: nellymoser, 44100 Hz, mono, s16
    
At least one output file must be specified

    when i try using command - ffmpeg -i sample.flv -sameq -ar 22050 sample.mp4

    I get error with following output.

    ffmpeg -i sample.flv -sameq -ar 22050 sample.mp4
    
FFmpeg version SVN-r0.5.9-4:0.5.9-0ubuntu0.10.04.1, Copyright (c) 2000-2009 Fabrice Bellard, et al.
    
  configuration: --extra-version=4:0.5.9-0ubuntu0.10.04.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --disable-stripping --disable-vhook --enable-runtime-cpudetect --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --enable-shared --disable-static
    
  libavutil     49.15. 0 / 49.15. 0
    
  libavcodec    52.20. 1 / 52.20. 1
    
  libavformat   52.31. 0 / 52.31. 0
    
  libavdevice   52. 1. 0 / 52. 1. 0
    
  libavfilter    0. 4. 0 /  0. 4. 0
    
  libswscale     0. 7. 1 /  0. 7. 1
    
  libpostproc   51. 2. 0 / 51. 2. 0
    
  built on Jun 12 2012 16:27:59, gcc: 4.4.3
    
Input #0, flv, from 'sample.flv':
    
  Duration: 00:01:06.90, start: 2.079000, bitrate: N/A
    
    Stream #0.0: Video: flv, yuv420p, 352x200, 1k tbr, 1k tbn, 1k tbc
    
    Stream #0.1: Audio: nellymoser, 44100 Hz, mono, s16
    
Output #0, mp4, to 'sample.mp4':
    
    Stream #0.0: Video: mpeg4, yuv420p, 352x200, q=2-31, 200 kb/s, 90k tbn, 1k tbc
    
    Stream #0.1: Audio: 0x0000, 22050 Hz, mono, s16, 64 kb/s
    
Stream mapping:
    
  Stream #0.0 -> #0.0
    
  Stream #0.1 -> #0.1
    
Unsupported codec for output stream #0.1

    I am not very conversant with ffmpeg and any help, pointers would highly appreciated.

    Many thanks is advance.

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