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    5 septembre 2013, par

    Certains thèmes prennent en compte trois éléments de personnalisation : l’ajout d’un logo ; l’ajout d’une bannière l’ajout d’une image de fond ;

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    21 juin 2013, par

    Présentez les changements dans votre MédiaSPIP ou les actualités de vos projets sur votre MédiaSPIP grâce à la rubrique actualités.
    Dans le thème par défaut spipeo de MédiaSPIP, les actualités sont affichées en bas de la page principale sous les éditoriaux.
    Vous pouvez personnaliser le formulaire de création d’une actualité.
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  • Publier sur MédiaSpip

    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
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Sur d’autres sites (9154)

  • Building FFMPEG library for iOS5.1 ARMv7 Processor

    26 octobre 2012, par Jimmy

    I cleaned up my question a little bit, when I wrote it the first time I was flustered. Now I can be more clear after taking a small break.

    I'm trying to use the FFMPEG library in an XCode 4.5.1 project. And I'm trying to build it for ARMv7. What I'm looking for is the exact process, and some explanation. I understand that this is not a well documented problem. But I know that other pople have had the same problem as me.

    What I have been able to do.

    I have been able to build the library for xCode. here Is what I have been able to do step by step.

    1) I have been able to clone ffmpeg. For beginners this will get you started by creating a directory with the ffmpeg source. (Kudos to the guys who wrote it)

    git clone git ://source.ffmpeg.org/ffmpeg.git ffmpeg

    2) I have been able to write a config file that doesn't have any errors. We will go back to this part later. This is the command I attach to ./configure

    ./configure
    —disable-doc
    —disable-ffmpeg
    —disable-ffplay
    —disable-ffserver
    —enable-cross-compile
    —arch=arm
    —target-os=darwin
    —cc=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/llvm-gcc-4.2/bin/arm-apple-darwin10-llvm-gcc-4.2

    —as='gas-preprocessor/gas-preprocessor.pl /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/llvm-gcc-4.2/bin/arm-apple-darwin10-llvm-gcc-4.2'

    —sysroot=/applications/xcode.app/contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk

    —cpu=cortex-a8
    —extra-ldflags='-arch=armv7 -isysroot /applications/xcode.app/contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk'
    —enable-pic —disable-bzlib —disable-gpl —disable-shared —enable-static —disable-mmx —disable-debug —disable-neon —extra-cflags='-pipe -Os -gdwarf-2 -isysroot /applications/xcode.app/contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.1.sdk
    -m$thumb_opt :-no-thumb -mthumb-interwork'

    These are some things to note.

    • I had to download ( https://github.com/yuvi/gas-preprocessor ) copy the file gas-preprocessor.pl at /usr/local/bin. Set permissions to read write (777)
    • Make sure I'm using the right GCC compiler : /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/llvm-gcc-4.2/bin/arm-apple-darwin10-llvm-gcc-4.2
    • Make sure I'm using the right SDK : /applications/xcode.app/contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.1.sdk
    • —extra-cflags="-arch armv7" causes : error : unrecognized command line option “-arch”

    Here in lies the problem.

    When I include the library and the declaration. Everything works fine ! (You will want to make sure your library paths in xcode are properly written if it can't find the library. There are plenty of people with this problem, stackover flow has a wealth of knowledge here)

    But when I started to write the encoder. I received this warning, and countless errors.

    ignoring file /Users/Jimmy/Development/source.ffmpeg/Library/libavutil.a, file was built for archive which is not the architecture being linked (armv7s) : /Users/Jimmy/Development/source.ffmpeg/Library/libavutil.a

    That means that I didn't build for ARMv7 and that -arch configuration I took out is actually essential.

    What I'm looking for is someone whose done it before, to walk all of us through the process of building FFMPEG for iOS5.1 and ARMv7 and the majority of things to look out for. If no one comes forth, in time I'll answer my own question and hopefully help out others who are struggling too.

  • avcodec/mpegvideo : flip motion vector visualization for backward motion vectors

    9 juillet 2014, par Michael Niedermayer
    avcodec/mpegvideo : flip motion vector visualization for backward motion vectors

    Also support changing arrow head/tail shape
    

    Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
    • [DH] libavcodec/mpegvideo.c

  • FFmpeg - downmixing FLAC 6.1 to AAC 5.1

    7 juillet 2014, par Martijn

    I can’t seem to figure out how to do this. I’ve been staring at these commands :
    https://trac.ffmpeg.org/wiki/AudioChannelManipulation

    But to no avail. It’s a tad above my level, sadly. Here’s the ffmpeg -i output for the video in question :

    ffmpeg version N-64012-g61df081 Copyright (c) 2000-2014 the FFmpeg developers
    
  built on Jun 16 2014 22:01:59 with gcc 4.8.3 (GCC)
    
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex--enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-decklink --enable-zlib
    
  libavutil      52. 89.100 / 52. 89.100
    
  libavcodec     55. 67.100 / 55. 67.100
    
  libavformat    55. 43.100 / 55. 43.100
    
  libavdevice    55. 13.101 / 55. 13.101
    
  libavfilter     4.  8.100 /  4.  8.100
    
  libswscale      2.  6.100 /  2.  6.100
    
  libswresample   0. 19.100 /  0. 19.100
    
  libpostproc    52.  3.100 / 52.  3.100
    
Input #0, matroska,webm, from '[Coalgirls]_Spirited_Away_(1920x1038_Blu-ray_FLAC)_[92372194].mkv':
    
  Metadata:
    
    title           : Spirited Away
    
    encoder         : libebml v1.3.0 + libmatroska v1.4.0
    
    creation_time   : 2014-07-03 01:32:13
    
  Duration: 02:04:32.29, start: 0.000000, bitrate: 15972 kb/s
    
    Chapter #0.0: start 0.000000, end 99.099000
    
    Metadata:
    
      title           : 00:00:00.000
    
    Chapter #0.1: start 99.099000, end 196.238000
    
    Metadata:
    
      title           : 00:01:39.099
    
    Chapter #0.2: start 196.238000, end 443.526000
    
    Metadata:
    
      title           : 00:03:16.238
    
    Chapter #0.3: start 443.526000, end 645.395000
    
    Metadata:
    
      title           : 00:07:23.526
    
    Chapter #0.4: start 645.395000, end 1023.022000
    
    Metadata:
    
      title           : 00:10:45.395
    
    Chapter #0.5: start 1023.022000, end 1368.534000
    
    Metadata:
    
      title           : 00:17:03.022
    
    Chapter #0.6: start 1368.534000, end 1716.048000
    
    Metadata:
    
      title           : 00:22:48.534
    
    Chapter #0.7: start 1716.048000, end 2008.173000
    
    Metadata:
    
      title           : 00:28:36.048
    
    Chapter #0.8: start 2008.173000, end 2301.674000
    
    Metadata:
    
      title           : 00:33:28.173
    
    Chapter #0.9: start 2301.674000, end 2651.816000
    
    Metadata:
    
      title           : 00:38:21.674
    
    Chapter #0.10: start 2651.816000, end 2906.821000
    
    Metadata:
    
      title           : 00:44:11.816
    
    Chapter #0.11: start 2906.821000, end 3271.351000
    
    Metadata:
    
      title           : 00:48:26.821
    
    Chapter #0.12: start 3271.351000, end 3729.017000
    
    Metadata:
    
      title           : 00:54:31.351
    
    Chapter #0.13: start 3729.017000, end 4091.587000
    
    Metadata:
    
      title           : 01:02:09.017
    
    Chapter #0.14: start 4091.587000, end 4476.847000
    
    Metadata:
    
      title           : 01:08:11.587
    
    Chapter #0.15: start 4476.847000, end 4750.579000
    
    Metadata:
    
      title           : 01:14:36.847
    
    Chapter #0.16: start 4750.579000, end 5139.760000
    
    Metadata:
    
      title           : 01:19:10.579
    
    Chapter #0.17: start 5139.760000, end 5478.890000
    
    Metadata:
    
      title           : 01:25:39.760
    
    Chapter #0.18: start 5478.890000, end 5853.806000
    
    Metadata:
    
      title           : 01:31:18.890
    
    Chapter #0.19: start 5853.806000, end 6318.937000
    
    Metadata:
    
      title           : 01:37:33.806
    
    Chapter #0.20: start 6318.937000, end 6625.118000
    
    Metadata:
    
      title           : 01:45:18.937
    
    Chapter #0.21: start 6625.118000, end 6771.098000
    
    Metadata:
    
      title           : 01:50:25.118
    
    Chapter #0.22: start 6771.098000, end 6914.199000
    
    Metadata:
    
      title           : 01:52:51.098
    
    Chapter #0.23: start 6914.199000, end 7253.580000
    
    Metadata:
    
      title           : 01:55:14.199
    
    Chapter #0.24: start 7253.580000, end 7472.288000
    
    Metadata:
    
      title           : 02:00:53.580
    
    Stream #0:0: Video: h264 (High 10), yuv420p10le(tv, bt709), 1920x1038, SAR 1:1 DAR 320:173, 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
    
    Metadata:
    
      title           : Spirited Away
    
    Stream #0:1(jpn): Audio: flac, 48000 Hz, 6.1, s32 (default)
    
    Metadata:
    
      title           : 6.1 FLAC
    
    Stream #0:2(eng): Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
    
    Metadata:
    
      title           : 5.1 AC3
    
    Stream #0:3(fre): Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
    
    Metadata:
    
      title           : 5.1 AC3
    
    Stream #0:4(ger): Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
    
    Metadata:
    
      title           : 5.1 AC3
    
    Stream #0:5(fin): Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
    
    Metadata:
    
      title           : 2.0 AC3
    
    Stream #0:6(kor): Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
    
    Metadata:
    
      title           : 5.1 AC3
    
    Stream #0:7(chi): Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
    
    Metadata:
    
      title           : 5.1 AC3
    
    Stream #0:8(chi): Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
    
    Metadata:
    
      title           : 5.1 AC3
    
    Stream #0:9(eng): Subtitle: ssa (default)
    
    Metadata:
    
      title           : English
    
    Stream #0:10(fre): Subtitle: ssa
    
    Metadata:
    
      title           : French
    
    Stream #0:11(ger): Subtitle: ssa
    
    Metadata:
    
      title           : German
    
    Stream #0:12(eng): Subtitle: ssa
    
    Metadata:
    
      title           : Songs + Signs
    
    Stream #0:13: Attachment: ttf
    
    Metadata:
    
      filename        : MyriadPro-Regular.otf
    
      mimetype        : application/x-truetype-font
    
    Stream #0:14: Attachment: ttf
    
    Metadata:
    
      filename        : MyriadPro-SemiboldIt.otf
    
      mimetype        : application/x-truetype-font
    
    Stream #0:15: Attachment: ttf
    
    Metadata:
    
      filename        : Vesta-Bold.otf
    
      mimetype        : application/x-truetype-font
    
    Stream #0:16: Attachment: ttf
    
    Metadata:
    
      filename        : Vesta-Bold_2.otf
    
      mimetype        : application/x-truetype-font
    
    Stream #0:17: Attachment: ttf
    
    Metadata:
    
      filename        : AR CENA_0.TTF
    
      mimetype        : application/x-truetype-font
    
    Stream #0:18: Attachment: ttf
    
    Metadata:
    
      filename        : tahomabd.ttf
    
      mimetype        : application/x-truetype-font
    
    Stream #0:19: Attachment: ttf
    
    Metadata:
    
      filename        : palai.ttf
    
      mimetype        : application/x-truetype-font
    
    Stream #0:20: Attachment: ttf
    
    Metadata:
    
      filename        : pala.ttf
    
      mimetype        : application/x-truetype-font

    As you can see, one of the streams is a FLAC 6.1 stream. I wanted to convert that to AAC, and I know how to do that, basically like this :

    ffmpeg -i "input.mkv" -codec:v copy -codec:a aac -strict -2 -b:a 320k -f matroska "output.mkv"

    But apparently AAC doesn’t support 6.1 audio :

    ...
    
[aac @ 03b26860] Unsupported number of channels: 7
    
Output #0, matroska, to 'd:\Movies\[Coalgirls]_Spirited_Away_(1920x1038_Blu-ray_FLAC)_[92372194].aac.mkv':
    
    Stream #0:0(jpn): Video: h264, yuv420p10le, 1920x1038 [SAR 1:1 DAR 320:173], q=2-31, 23.98 fps, 90k tbn, 1k tbc (default)
    
    Stream #0:1(jpn): Audio: aac, 0 channels, 128 kb/s (default)
    
    Metadata:
    
      encoder         : Lavc55.67.100 aac
    
    Stream #0:2(eng): Subtitle: ssa, 128 kb/s (default)
    
    Metadata:
    
      encoder         : Lavc55.67.100 ssa
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
  Stream #0:1 -> #0:1 (flac (native) -> aac (aac))
    
  Stream #0:9 -> #0:2 (ssa (native) -> ssa (native))
    
Error while opening encoder for output stream #0:1 - maybe incorrect parameters such as bit_rate, rate, width or height

    That’s fine, so I wanted to downmix it to 5.1 and encode as AAC. But I can’t seem to work out how to. Any advice ?

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