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  • MediaSPIP Core : La Configuration

    9 novembre 2010, par

    MediaSPIP Core fournit par défaut trois pages différentes de configuration (ces pages utilisent le plugin de configuration CFG pour fonctionner) : une page spécifique à la configuration générale du squelettes ; une page spécifique à la configuration de la page d’accueil du site ; une page spécifique à la configuration des secteurs ;
    Il fournit également une page supplémentaire qui n’apparait que lorsque certains plugins sont activés permettant de contrôler l’affichage et les fonctionnalités spécifiques (...)

  • 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 (...)

  • Problèmes fréquents

    10 mars 2010, par

    PHP et safe_mode activé
    Une des principales sources de problèmes relève de la configuration de PHP et notamment de l’activation du safe_mode
    La solution consiterait à soit désactiver le safe_mode soit placer le script dans un répertoire accessible par apache pour le site

Sur d’autres sites (9061)

  • Is there any library in python or can we use FFMPEG to detect the appearance of the lines pattern in video that is shown in the image attached below ? [closed]

    21 septembre 2022, par Shreyas R

    Video defect appearing frame

    


    Hi All,

    


    I am trying to find a way to detect the appearance of this lines pattern embedded in the link below.
If I get any match of this pattern in a video, I need to record that particular timestamp of the video where I got the pattern match.

    


    My idea is to take the image and compare it against the video to find for approximate match percentage. If I get it, then I record that particular timestamp within a .txt file.

    


    Is there any better way to achieve this ?
I think we can use Python or FFMPEG video filters to get a solution for this.

    


    It would really help if anyone can support with a solution. Thanks

    


    Update :
I got a reference where they have proposed a solution similar to my concern.

    


    https://aws.amazon.com/blogs/media/metfc-automatically-compare-two-videos-to-find-common-content/

    


    So we can try to achieve some output from this solution.

    


  • Installation of opencv and ffmpeg on anaconda

    17 mars 2017, par user564650

    I am using an amazon EC2 instance and working on a deep learning problem. I want to install opencv along with ffmpeg on anaconda python in order to process the video frames. Can somebody please help out with the installation ?

  • Looking for a general purpose way to merge audio and video file and make an output have stereo audio with FFmpeg

    21 février 2020, par Pineapple Joe

    So have have the following FFmpeg command

    ffmpeg -i vidab.mp4 -i recab.webm  -filter_complex "[0:a]volume=0.2,apad[A];[1:a][A]amerge[Aout]" -map 0:v -map [Aout] -y mergeab.mp4

    When the input files are played separately their audio is played equally through both headphones.

    But after being merged the audio from the video is on the right side and the audio from the webm file is on the left side.

    I see this in the output when I run the cmd

    [Parsed_amerge_2 @ 0x7fa0faf01bc0] No channel layout for input 1
    
[Parsed_amerge_2 @ 0x7fa0faf01bc0] Input channel layouts overlap: output layout will be determined by the number of distinct input channels

    How can I adjust this so that the output file has the audio from both the inputs in equally in the left and right sides ?

    Also is there a generic way to do this such that even different configurations (video has stereo and audio has mono ... or both have stereo) result in the Audio being split evenly.

    I tried using the pan filter but there is something I am not understanding about how it works because either nothing happens or I flip left and right. But I am not getting even stereo.

    fwiw here is the full output.

    ffmpeg -i vidab.mp4 -i recab.webm  -filter_complex "[0:a]volume=0.2,apad[A];[1:a][A]amerge[Aout]" -map 0:v -map [Aout] -y mergeab.mp4
    
ffmpeg version 4.2.1 Copyright (c) 2000-2019 the FFmpeg developers
    
  built with Apple clang version 11.0.0 (clang-1100.0.33.8)
    
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.2.1_2 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags='-I/Library/Java/JavaVirtualMachines/adoptopenjdk-13.jdk/Contents/Home/include -I/Library/Java/JavaVirtualMachines/adoptopenjdk-13.jdk/Contents/Home/include/darwin -fno-stack-check' --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-libvidstab --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-libsoxr --enable-videotoolbox --disable-libjack --disable-indev=jack
    
  libavutil      56. 31.100 / 56. 31.100
    
  libavcodec     58. 54.100 / 58. 54.100
    
  libavformat    58. 29.100 / 58. 29.100
    
  libavdevice    58.  8.100 / 58.  8.100
    
  libavfilter     7. 57.100 /  7. 57.100
    
  libavresample   4.  0.  0 /  4.  0.  0
    
  libswscale      5.  5.100 /  5.  5.100
    
  libswresample   3.  5.100 /  3.  5.100
    
  libpostproc    55.  5.100 / 55.  5.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'vidab.mp4':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 0
    
    compatible_brands: qt  
    
    creation_time   : 2020-02-21T00:35:25.000000Z
    
  Duration: 00:00:10.65, start: 0.000000, bitrate: 2539 kb/s
    
    Stream #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 96 kb/s (default)
    
    Metadata:
    
      creation_time   : 2020-02-21T00:35:25.000000Z
    
      handler_name    : Core Media Audio
    
    Stream #0:1(und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt709), 1280x640, 2436 kb/s, 29.87 fps, 29.97 tbr, 90k tbn, 180k tbc (default)
    
    Metadata:
    
      creation_time   : 2020-02-21T00:35:25.000000Z
    
      handler_name    : Core Media Video
    
      encoder         : H.264
    
Input #1, matroska,webm, from 'recab.webm':
    
  Metadata:
    
    encoder         : opus-media-recorder
    
  Duration: N/A, start: 0.000000, bitrate: N/A
    
    Stream #1:0(eng): Audio: opus, 48000 Hz, mono, fltp (default)
    
Stream mapping:
    
  Stream #0:0 (aac) -> volume (graph 0)
    
  Stream #1:0 (opus) -> amerge:in0 (graph 0)
    
  Stream #0:1 -> #0:0 (h264 (native) -> h264 (libx264))
    
  amerge (graph 0) -> Stream #0:1 (aac)
    
Press [q] to stop, [?] for help
    
[libx264 @ 0x7fa0fb004000] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
    
[libx264 @ 0x7fa0fb004000] profile High, level 3.1
    
[libx264 @ 0x7fa0fb004000] 264 - core 155 r2917 0a84d98 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
[Parsed_amerge_2 @ 0x7fa0faf01bc0] No channel layout for input 1
    
[Parsed_amerge_2 @ 0x7fa0faf01bc0] Input channel layouts overlap: output layout will be determined by the number of distinct input channels
    
Output #0, mp4, to 'mergeab.mp4':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 0
    
    compatible_brands: qt  
    
    encoder         : Lavf58.29.100
    
    Stream #0:0(und): Video: h264 (libx264) (avc1 / 0x31637661), yuvj420p(pc, progressive), 1280x640, q=-1--1, 29.97 fps, 30k tbn, 29.97 tbc (default)
    
    Metadata:
    
      creation_time   : 2020-02-21T00:35:25.000000Z
    
      handler_name    : Core Media Video
    
      encoder         : Lavc58.54.100 libx264
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    
    Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
    
    Metadata:
    
      encoder         : Lavc58.54.100 aac
    
frame=  318 fps=107 q=-1.0 Lsize=    1568kB time=00:00:17.72 bitrate= 724.8kbits/s speed=5.99x    
    
video:1282kB audio:272kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.902630%
    
[libx264 @ 0x7fa0fb004000] frame I:2     Avg QP:19.72  size: 51154
    
[libx264 @ 0x7fa0fb004000] frame P:148   Avg QP:21.28  size:  6644
    
[libx264 @ 0x7fa0fb004000] frame B:168   Avg QP:25.18  size:  1351
    
[libx264 @ 0x7fa0fb004000] consecutive B-frames:  1.3% 84.9%  0.0% 13.8%
    
[libx264 @ 0x7fa0fb004000] mb I  I16..4: 23.2% 49.3% 27.5%
    
[libx264 @ 0x7fa0fb004000] mb P  I16..4:  2.1%  2.0%  0.2%  P16..4: 29.0%  5.1%  4.8%  0.0%  0.0%    skip:56.8%
    
[libx264 @ 0x7fa0fb004000] mb B  I16..4:  0.5%  0.3%  0.0%  B16..8: 16.7%  0.8%  0.2%  direct: 6.1%  skip:75.4%  L0:24.8% L1:71.1% BI: 4.1%
    
[libx264 @ 0x7fa0fb004000] 8x8 transform intra:45.4% inter:74.3%
    
[libx264 @ 0x7fa0fb004000] coded y,uvDC,uvAC intra: 29.3% 51.4% 11.6% inter: 5.7% 16.6% 0.3%
    
[libx264 @ 0x7fa0fb004000] i16 v,h,dc,p: 11% 53% 10% 26%
    
[libx264 @ 0x7fa0fb004000] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 13% 36% 35%  2%  2%  2%  4%  2%  3%
    
[libx264 @ 0x7fa0fb004000] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 24% 30% 12%  4%  6%  5%  7%  5%  6%
    
[libx264 @ 0x7fa0fb004000] i8c dc,h,v,p: 47% 33% 17%  4%
    
[libx264 @ 0x7fa0fb004000] Weighted P-Frames: Y:0.0% UV:0.0%
    
[libx264 @ 0x7fa0fb004000] ref P L0: 76.6%  7.6% 11.1%  4.7%
    
[libx264 @ 0x7fa0fb004000] ref B L0: 89.1% 10.3%  0.6%
    
[libx264 @ 0x7fa0fb004000] ref B L1: 99.7%  0.3%
    
[libx264 @ 0x7fa0fb004000] kb/s:989.60
    
[aac @ 0x7fa0fb005800] Qavg: 13376.354

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