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  • 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.

  • Gestion des droits de création et d’édition des objets

    8 février 2011, par

    Par défaut, beaucoup de fonctionnalités sont limitées aux administrateurs mais restent configurables indépendamment pour modifier leur statut minimal d’utilisation notamment : la rédaction de contenus sur le site modifiables dans la gestion des templates de formulaires ; l’ajout de notes aux articles ; l’ajout de légendes et d’annotations sur les images ;

  • Les tâches Cron régulières de la ferme

    1er décembre 2010, par

    La gestion de la ferme passe par l’exécution à intervalle régulier de plusieurs tâches répétitives dites Cron.
    Le super Cron (gestion_mutu_super_cron)
    Cette tâche, planifiée chaque minute, a pour simple effet d’appeler le Cron de l’ensemble des instances de la mutualisation régulièrement. Couplée avec un Cron système sur le site central de la mutualisation, cela permet de simplement générer des visites régulières sur les différents sites et éviter que les tâches des sites peu visités soient trop (...)

Sur d’autres sites (10221)

  • avcodec/g729dec : Use 64bit and clip in scalar product

    5 novembre 2019, par Michael Niedermayer
    avcodec/g729dec : Use 64bit and clip in scalar product

    The G729 reference decoder clips after each individual operation and keeps track if overflow
    
occurred (in the fixed point implementation), this here is
    
simpler and faster but not 1:1 the same what the reference does.
    

    Non fuzzed samples which trigger any such overflow are welcome, so
    
the need and impact of different clipping solutions can be evaluated.
    

    Fixes : signed integer overflow : 1271483721 + 1073676289 cannot be represented in type 'int'
    
Fixes : 18617/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ACELP_KELVIN_fuzzer-5137705679978496
    

    Found-by : continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
    
Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
    • [DH] libavcodec/g729dec.c

  • ffmpeg concat loses audio after first clip only in browser, audio plays good on player like vlc etc

    1er octobre 2019, par Rajan Tpss

    i am trying to combine or concatenate audio file one after other like after concatenation of two audio files, both file will downloaded as a single file wheres audio will be played in a queue one after other.

    after some research i found the package FFmpeg i.e dealt with mp3,mp4 etc files.i tried to run FFmpeg commands in terminal but file is created and playing good on VLC but not playing accurately in browser.

    Some Commands tried by me in terminal are as follow :-

    ffmpeg -i "concat:a.mp3|b.mp3" -acodec copy output.mp3

    ffmpeg -f concat -i files.txt -c copy output.mp3

    ffmpeg -i a.mp3 -i b.mp3 -filter_complex "[0:v:0] [0:a:0] [1:v:0] [1:a:0] concat=n=2:v=0:a=1 [v] [a]" -map "[v]" -map "[a]" output.mp3

    ffmpeg -y -i "concat:a.mp3|b.mp3" -ar 22050 -ab 512 -b 800k -f mp4 -s 514*362 -strict -2 -c:a aac "OUTPUT.mp4"

    Library Link followed by me :- https://ffmpeg.org/ffmpeg-filters.html

    Note :- I am using Ubuntu based system

    file is created successfully from above commands and playing well on VLC player.

    where in browser first clip is playing well but after first clip browser stops. somehow second audio clip is not playing in browser. i don’t know why may be there is same kind of pattern error.

    if anyone can help, i shall be very thankful to him/her.

    Thanks

  • FFMPEG fails to trim beginning of clip

    23 février 2020, par miguelmorin

    I have two .MTS files taken in sequence and I want to trim them to the first five seconds. This command works for the first file :

    ffmpeg -ss 0 -to 5 -i 00117.MTS -vcodec copy -acodec copy start_00117.MTS

    The result is 5 seconds and 17 MB, as opposed to the 12 minutes and 2 GB from the original.

    The same command on the second file fails :

    ffmpeg -ss 0 -to 5 -i 00118.MTS -vcodec copy -acodec copy start_00118.MTS

    The result is 12 minutes and 2 GB, like its original file.

    What is the problem ?

    Full log :

    $ rm start_00117.MTS; ffmpeg -ss 0 -to 5 -i 00117.MTS -vcodec copy -acodec copy start_00117.MTS
    
ffmpeg version 4.1.4 Copyright (c) 2000-2019 the FFmpeg developers
    
  built with Apple LLVM version 10.0.1 (clang-1001.0.46.4)
    
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.1.4_1 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags='-I/Library/Java/JavaVirtualMachines/adoptopenjdk-12.0.1.jdk/Contents/Home/include -I/Library/Java/JavaVirtualMachines/adoptopenjdk-12.0.1.jdk/Contents/Home/include/darwin' --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libtesseract --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-videotoolbox --disable-libjack --disable-indev=jack --enable-libaom --enable-libsoxr
    
  libavutil      56. 22.100 / 56. 22.100
    
  libavcodec     58. 35.100 / 58. 35.100
    
  libavformat    58. 20.100 / 58. 20.100
    
  libavdevice    58.  5.100 / 58.  5.100
    
  libavfilter     7. 40.101 /  7. 40.101
    
  libavresample   4.  0.  0 /  4.  0.  0
    
  libswscale      5.  3.100 /  5.  3.100
    
  libswresample   3.  3.100 /  3.  3.100
    
  libpostproc    55.  3.100 / 55.  3.100
    
Input #0, mpegts, from '00117.MTS':
    
  Duration: 00:12:36.02, start: 1.040000, bitrate: 22490 kb/s
    
  Program 1 
    
    Stream #0:0[0x1011]: Video: h264 (High) (HDMV / 0x564D4448), yuv420p(top first), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 50 tbr, 90k tbn, 50 tbc
    
    Stream #0:1[0x1100]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 256 kb/s
    
    Stream #0:2[0x1200]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090), 1920x1080
    
Output #0, mpegts, to 'start_00117.MTS':
    
  Metadata:
    
    encoder         : Lavf58.20.100
    
    Stream #0:0: Video: h264 (High) (HDMV / 0x564D4448), yuv420p(top first), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 25 fps, 50 tbr, 90k tbn, 90k tbc
    
    Stream #0:1: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 256 kb/s
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
  Stream #0:1 -> #0:1 (copy)
    
Press [q] to stop, [?] for help
    
frame=  304 fps=0.0 q=-1.0 Lsize=   16601kB time=00:00:06.02 bitrate=22590.4kbits/s speed=25.8x    
    
video:15162kB audio:189kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 8.143849%
    
$ rm start_00118.MTS; ffmpeg -ss 0 -to 5 -i 00118.MTS -vcodec copy -acodec copy start_00118.MTS
    
rm: start_00118.MTS: No such file or directory
    
ffmpeg version 4.1.4 Copyright (c) 2000-2019 the FFmpeg developers
    
  built with Apple LLVM version 10.0.1 (clang-1001.0.46.4)
    
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.1.4_1 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags='-I/Library/Java/JavaVirtualMachines/adoptopenjdk-12.0.1.jdk/Contents/Home/include -I/Library/Java/JavaVirtualMachines/adoptopenjdk-12.0.1.jdk/Contents/Home/include/darwin' --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libtesseract --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-videotoolbox --disable-libjack --disable-indev=jack --enable-libaom --enable-libsoxr
    
  libavutil      56. 22.100 / 56. 22.100
    
  libavcodec     58. 35.100 / 58. 35.100
    
  libavformat    58. 20.100 / 58. 20.100
    
  libavdevice    58.  5.100 / 58.  5.100
    
  libavfilter     7. 40.101 /  7. 40.101
    
  libavresample   4.  0.  0 /  4.  0.  0
    
  libswscale      5.  3.100 /  5.  3.100
    
  libswresample   3.  3.100 /  3.  3.100
    
  libpostproc    55.  3.100 / 55.  3.100
    
Input #0, mpegts, from '00118.MTS':
    
  Duration: 00:12:36.59, start: 756.592000, bitrate: 22471 kb/s
    
  Program 1 
    
    Stream #0:0[0x1011]: Video: h264 (High) (HDMV / 0x564D4448), yuv420p(top first), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 50 tbr, 90k tbn, 50 tbc
    
    Stream #0:1[0x1100]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 256 kb/s
    
    Stream #0:2[0x1200]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090), 1920x1080
    
Output #0, mpegts, to 'start_00118.MTS':
    
  Metadata:
    
    encoder         : Lavf58.20.100
    
    Stream #0:0: Video: h264 (High) (HDMV / 0x564D4448), yuv420p(top first), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 25 fps, 50 tbr, 90k tbn, 90k tbc
    
    Stream #0:1: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 256 kb/s
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
  Stream #0:1 -> #0:1 (copy)
    
Press [q] to stop, [?] for help
    
frame=37804 fps=923 q=-1.0 Lsize= 2130467kB time=00:12:36.54 bitrate=23069.0kbits/s speed=18.5x    
    
video:1946718kB audio:23627kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 8.126621%

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