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Autres articles (69)

  • Use, discuss, criticize

    13 avril 2011, par

    Talk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
    The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
    A discussion list is available for all exchanges between users.

  • Installation en mode ferme

    4 février 2011, par

    Le mode ferme permet d’héberger plusieurs sites de type MediaSPIP en n’installant qu’une seule fois son noyau fonctionnel.
    C’est la méthode que nous utilisons sur cette même plateforme.
    L’utilisation en mode ferme nécessite de connaïtre un peu le mécanisme de SPIP contrairement à la version standalone qui ne nécessite pas réellement de connaissances spécifique puisque l’espace privé habituel de SPIP n’est plus utilisé.
    Dans un premier temps, vous devez avoir installé les mêmes fichiers que l’installation (...)

  • Demande de création d’un canal

    12 mars 2010, par

    En fonction de la configuration de la plateforme, l’utilisateur peu avoir à sa disposition deux méthodes différentes de demande de création de canal. La première est au moment de son inscription, la seconde, après son inscription en remplissant un formulaire de demande.
    Les deux manières demandent les mêmes choses fonctionnent à peu près de la même manière, le futur utilisateur doit remplir une série de champ de formulaire permettant tout d’abord aux administrateurs d’avoir des informations quant à (...)

Sur d’autres sites (8324)

  • 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.

  • 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 ?

  • 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 );

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