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    Puis-je poster des contenus à partir d’une tablette Ipad ?
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    15 novembre 2010, par

    Accéder à la configuration et ajouter des langues prises en compte
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  • 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.
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  • Is there a way to tell ffmpeg to speed up a video so its duration matches the duration of the audio ?

    7 février 2020, par Qix - MONICA WAS MISTREATED

    Just as the title describes ; is there a simple way to tell ffmpeg to take in video and audio tracks and to speed up (or slow down, I suppose) the video so that it matches the duration of the audio ? I can calculate PTS values but have no idea how to do it in an automated way.

  • How to speed up creating video mosaic with ffmpeg

    7 janvier 2020, par DALER RAHIMOV

    I’m looking to speed up ffmpeg pipeline in some way (camera configuration, different filters or any other ideas would be appreciated).

    I have a device that captures videos streams and later creates mosaic video view from 4 cameras. The main issue I’m having is that it’s taking too long to create mosaic video. There is no GPU on the device that could be used to accelerate the process so I’m left with camera configurations (Hikvision).

    Here is what I have so far

    About 160 sec on Intel J-1900 :

    - 5 min video files,
    
- 640*480 resolution,
    
- h264 encoding,
    
- 10 fps,
    
- 1024 max bitrate,
    
- 10 I-frame interval,      

    Command that I’m using :

    ffmpeg -y -i 1578324600-1-stitched.mp4 -i 1578324600-1-stitched.mp4 -i 1578324600-1-stitched.mp4 -i 1578324600-1-stitched.mp4 \
    
   -filter_complex " \
    
      color=c=black:size=1280x720 [base]; \
    
      [0:v] setpts=PTS-STARTPTS, scale=640x360 [cam0]; \
    
      [1:v] setpts=PTS-STARTPTS, scale=640x360 [cam1]; \
    
      [2:v] setpts=PTS-STARTPTS, scale=640x360 [cam2]; \
    
      [3:v] setpts=PTS-STARTPTS, scale=640x360 [cam3]; \
    
      [base][cam0] overlay=shortest=1:x=0:y=0  [z1]; \
    
      [z1][cam1] overlay=shortest=1:x=640:y=0  [z2]; \
    
      [z2][cam2] overlay=shortest=1:x=0:y=360  [z3]; \
    
      [z3][cam3] overlay=shortest=1:x=640:y=360 \
    
    " \
    
    -an -c:v libx264  -x264-params keyint=10 \
    
    -movflags faststart -preset fast -nostats -loglevel quiet -r 10.000000 mosaic.mp4

    Thanks

    Here is full output as requested

    ffmpeg -y -i 1578324600-1-stitched.mp4 -i 1578324600-1-stitched.mp4 -i 1578324600-1-stitched.mp4 -i 1578324600-1-stitched.mp4 \
    
>    -filter_complex " \
    
>       color=c=black:size=1280x720 [base]; \
    
>       [0:v] setpts=PTS-STARTPTS, scale=640x360 [cam0]; \
    
>       [1:v] setpts=PTS-STARTPTS, scale=640x360 [cam1]; \
    
>       [2:v] setpts=PTS-STARTPTS, scale=640x360 [cam2]; \
    
>       [3:v] setpts=PTS-STARTPTS, scale=640x360 [cam3]; \
    
>       [base][cam0] overlay=shortest=1:x=0:y=0  [z1]; \
    
>       [z1][cam1] overlay=shortest=1:x=640:y=0  [z2]; \
    
>       [z2][cam2] overlay=shortest=1:x=0:y=360  [z3]; \
    
>       [z3][cam3] overlay=shortest=1:x=640:y=360 \
    
>     " \
    
>     -an -c:v libx264  -x264-params keyint=10 \
    
>     -movflags faststart -preset fast -nostats -r 10.000000 mosaic.mp4
    
ffmpeg version 2.8.15-0ubuntu0.16.04.1 Copyright (c) 2000-2018 the FFmpeg developers
    
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
    
  configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg -y -i 1578324600-1-stitched.mp4 -i 1578324600-1-stitched.mp4 -i 1578324600-1-stitched.mp4 -i 1578324600-1-stitched.mp4    -filter_complex " \
    
      color=c=black:size=1280x720 [base]; \
    
      [0:v] setpts=PTS-STARTPTS, scale=640x360 [cam0]; \
    
      [1:v] setpts=PTS-STARTPTS, scale=640x360 [cam1]; \
    
      [2:v] setpts=PTS-STARTPTS, scale=640x360 [cam2]; \
    
      [3:v] setpts=PTS-STARTPTS, scale=640x360 [cam3]; \
    
      [base][cam0] overlay=shortest=1:x=0:y=0  [z1]; \
    
      [z1][cam1] overlay=shortest=1:x=640:y=0  [z2]; \
    
      [z2][cam2] overlay=shortest=1:x=0:y=360  [z3]; \
    
      [z3][cam3] overlay=shortest=1:x=640:y=360 \
    
    "     -an -c:v libx264  -x264-params keyint=10     -movflags faststart -preset fast -r 10.000000 mosaic.mp4
    
ffmpeg version 2.8.15-0ubuntu0.16.04.1 Copyright (c) 2000-2018 the FFmpeg developers
    
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
    
  configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
    
  libavutil      54. 31.100 / 54. 31.100
    
  libavcodec     56. 60.100 / 56. 60.100
    
  libavformat    56. 40.101 / 56. 40.101
    
  libavdevice    56.  4.100 / 56.  4.100
    
  libavfilter     5. 40.101 /  5. 40.101
    
  libavresample   2.  1.  0 /  2.  1.  0
    
  libswscale      3.  1.101 /  3.  1.101
    
  libswresample   1.  2.101 /  1.  2.101
    
  libpostproc    53.  3.100 / 53.  3.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1578324600-1-stitched.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf56.40.101
    
  Duration: 00:05:00.07, start: 0.000000, bitrate: 96 kb/s
    
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 640x480, 95 kb/s, 10 fps, 25 tbr, 10240 tbn, 20 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '1578324600-1-stitched.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf56.40.101
    
  Duration: 00:05:00.07, start: 0.000000, bitrate: 96 kb/s
    
    Stream #1:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 640x480, 95 kb/s, 10 fps, 25 tbr, 10240 tbn, 20 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
Input #2, mov,mp4,m4a,3gp,3g2,mj2, from '1578324600-1-stitched.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf56.40.101
    
  Duration: 00:05:00.07, start: 0.000000, bitrate: 96 kb/s
    
    Stream #2:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 640x480, 95 kb/s, 10 fps, 25 tbr, 10240 tbn, 20 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
Input #3, mov,mp4,m4a,3gp,3g2,mj2, from '1578324600-1-stitched.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf56.40.101
    
  Duration: 00:05:00.07, start: 0.000000, bitrate: 96 kb/s
    
    Stream #3:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 640x480, 95 kb/s, 10 fps, 25 tbr, 10240 tbn, 20 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
[libx264 @ 0x171c9e0] using SAR=1/1
    
[libx264 @ 0x171c9e0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
    
[libx264 @ 0x171c9e0] profile High, level 3.1
    
[libx264 @ 0x171c9e0] 264 - core 148 r2643 5c65704 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=2 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=6 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=6 lookahead_threads=1 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=1 keyint=10 keyint_min=1 scenecut=40 intra_refresh=0 rc_lookahead=10 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
Output #0, mp4, to 'mosaic.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf56.40.101
    
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 10 fps, 10240 tbn, 10 tbc (default)
    
    Metadata:
    
      encoder         : Lavc56.60.100 libx264
    
Stream mapping:
    
  Stream #0:0 (h264) -> setpts
    
  Stream #1:0 (h264) -> setpts
    
  Stream #2:0 (h264) -> setpts
    
  Stream #3:0 (h264) -> setpts
    
  overlay -> Stream #0:0 (libx264)
    
Press [q] to stop, [?] for help
    
[mp4 @ 0x1730600] Starting second pass: moving the moov atom to the beginning of the filerop=4497
    
frame= 3002 fps= 17 q=-1.0 Lsize=   51052kB time=00:05:00.00 bitrate=1394.1kbits/s dup=0 drop=4498
    
video:51017kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.068308%
    
[libx264 @ 0x171c9e0] frame I:301   Avg QP:15.80  size:154257
    
[libx264 @ 0x171c9e0] frame P:959   Avg QP:21.69  size:  5486
    
[libx264 @ 0x171c9e0] frame B:1742  Avg QP:22.73  size:   315
    
[libx264 @ 0x171c9e0] consecutive B-frames: 22.0%  0.0%  5.8% 72.2%
    
[libx264 @ 0x171c9e0] mb I  I16..4:  9.7% 31.0% 59.4%
    
[libx264 @ 0x171c9e0] mb P  I16..4:  0.6%  0.7%  0.2%  P16..4: 14.5%  2.8%  2.4%  0.0%  0.0%    skip:78.7%
    
[libx264 @ 0x171c9e0] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  2.7%  0.3%  0.0%  direct: 1.4%  skip:95.5%  L0:25.9% L1:73.3% BI: 0.9%
    
[libx264 @ 0x171c9e0] 8x8 transform intra:31.8% inter:43.5%
    
[libx264 @ 0x171c9e0] coded y,uvDC,uvAC intra: 83.2% 85.2% 69.5% inter: 3.0% 6.3% 0.7%
    
[libx264 @ 0x171c9e0] i16 v,h,dc,p: 35% 21%  8% 36%
    
[libx264 @ 0x171c9e0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 27% 42% 10%  3%  2%  3%  6%  4%  5%
    
[libx264 @ 0x171c9e0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 25% 33%  9%  6%  5%  5%  7%  5%  6%
    
[libx264 @ 0x171c9e0] i8c dc,h,v,p: 44% 29% 20%  7%
    
[libx264 @ 0x171c9e0] Weighted P-Frames: Y:0.0% UV:0.0%
    
[libx264 @ 0x171c9e0] ref P L0: 93.8%  6.2%
    
[libx264 @ 0x171c9e0] ref B L0: 91.7%  8.3%
    
[libx264 @ 0x171c9e0] ref B L1: 89.3% 10.7%
    
[libx264 @ 0x171c9e0] kb/s:1392.16

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