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  • Personnaliser les catégories

    21 juin 2013, par

    Formulaire de création d’une catégorie
    Pour ceux qui connaissent bien SPIP, une catégorie peut être assimilée à une rubrique.
    Dans le cas d’un document de type catégorie, les champs proposés par défaut sont : Texte
    On peut modifier ce formulaire dans la partie :
    Administration > Configuration des masques de formulaire.
    Dans le cas d’un document de type média, les champs non affichés par défaut sont : Descriptif rapide
    Par ailleurs, c’est dans cette partie configuration qu’on peut indiquer le (...)

  • Le plugin : Podcasts.

    14 juillet 2010, par

    Le problème du podcasting est à nouveau un problème révélateur de la normalisation des transports de données sur Internet.
    Deux formats intéressants existent : Celui développé par Apple, très axé sur l’utilisation d’iTunes dont la SPEC est ici ; Le format "Media RSS Module" qui est plus "libre" notamment soutenu par Yahoo et le logiciel Miro ;
    Types de fichiers supportés dans les flux
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  • Selection of projects using MediaSPIP

    2 mai 2011, par

    The examples below are representative elements of MediaSPIP specific uses for specific projects.
    MediaSPIP farm @ Infini
    The non profit organizationInfini develops hospitality activities, internet access point, training, realizing innovative projects in the field of information and communication technologies and Communication, and hosting of websites. It plays a unique and prominent role in the Brest (France) area, at the national level, among the half-dozen such association. Its members (...)

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  • How to convert first few seconds of a video to multiple output formats using ffmpeg

    5 juin 2012, par Hadi

    I want to convert first few seconds (say 5 seconds) of a video to multiple output formats using ffmpeg.

    when I Use this syntax to convert whole video, everything goes ok :
    (to be simple, i left all options to be default)

    ffmpeg -i input.flv output1.mp4 output2.avi

    but when trying for just first 5 seconds using this syntax :

    ffmpeg -t 5 -i input.flv output1.mp4 output2.avi

    first output file (i.e ouptput1.mp4) is ok and it is 5 seconds length, but the second (and next outputs, if present) has a size of original file.

    this is what ffmpeg prints out on the screen.

    D:\ffmpeg\bin>ffmpeg -t 5 -i input.flv output1.mp4 output2.avi
    
ffmpeg version N-40301-gc1fe2db Copyright (c) 2000-2012 the FFmpeg developers
    
  built on May  3 2012 11:40:38 with gcc 4.6.3
    
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-ru
    
ntime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass
    
 --enable-libcelt --enable-libopencore-amrnb --enable-libopencore-amrwb --enable
    
-libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libope
    
njpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libth
    
eora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-
    
libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --e
    
nable-zlib
    
  libavutil      51. 49.100 / 51. 49.100
    
  libavcodec     54. 17.101 / 54. 17.101
    
  libavformat    54.  3.100 / 54.  3.100
    
  libavdevice    53.  4.100 / 53.  4.100
    
  libavfilter     2. 72.104 /  2. 72.104
    
  libswscale      2.  1.100 /  2.  1.100
    
  libswresample   0. 11.100 /  0. 11.100
    
  libpostproc    52.  0.100 / 52.  0.100
    
Input #0, flv, from 'input.flv':
    
  Duration: 00:00:37.00, start: 0.000000, bitrate: 366 kb/s
    
    Stream #0:0: Video: flv1, yuv420p, 320x240, 300 kb/s, 29.97 tbr, 1k tbn, 1k
    
tbc
    
    Stream #0:1: Audio: mp3, 22050 Hz, mono, s16, 56 kb/s
    
[buffer @ 01de98c0] w:320 h:240 pixfmt:yuv420p tb:1/1000000 sar:0/1 sws_param:fl
    
ags=2
    
[buffer @ 01dea4e0] w:320 h:240 pixfmt:yuv420p tb:1/1000000 sar:0/1 sws_param:fl
    
ags=2
    
[libx264 @ 02b067a0] using cpu capabilities: MMX2 Cache64
    
[libx264 @ 02b067a0] profile High, level 1.3
    
[libx264 @ 02b067a0] 264 - core 120 r2164 da19765 - H.264/MPEG-4 AVC codec - Cop
    
yleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deb
    
lock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 m
    
e_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chro
    
ma_qp_offset=-2 threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_c
    
ompat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 we
    
ightb=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
    
Output #0, mp4, to 'output1.mp4':
    
  Metadata:
    
    encoder         : Lavf54.3.100
    
    Stream #0:0: Video: h264 (![0][0][0] / 0x0021), yuv420p, 320x240, q=-1--1, 3
    
0k tbn, 29.97 tbc
    
    Stream #0:1: Audio: aac (@[0][0][0] / 0x0040), 22050 Hz, mono, s16, 128 kb/s
    

    
Output #1, avi, to 'output2.avi':
    
  Metadata:
    
    ISFT            : Lavf54.3.100
    
    Stream #1:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 320x240, q=2-31, 200
    
 kb/s, 29.97 tbn, 29.97 tbc
    
    Stream #1:1: Audio: mp3 (U[0][0][0] / 0x0055), 22050 Hz, mono, s16
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (flv -> libx264)
    
  Stream #0:1 -> #0:1 (mp3 -> libvo_aacenc)
    
  Stream #0:0 -> #1:0 (flv -> mpeg4)
    
  Stream #0:1 -> #1:1 (mp3 -> libmp3lame)
    
Press [q] to stop, [?] for help
    
frame=   48 fps=0.0 q=29.0 q=2.4 size=       8kB time=00:00:00.16 bitrate= 399.6
    
frame=   62 fps= 59 q=29.0 q=2.4 size=      32kB time=00:00:00.63 bitrate= 408.8
    
frame=   73 fps= 46 q=29.0 q=3.5 size=      57kB time=00:00:01.00 bitrate= 466.1
    
frame=  104 fps= 50 q=29.0 q=3.5 size=      87kB time=00:00:02.03 bitrate= 349.7
    
frame=  134 fps= 52 q=29.0 q=3.6 size=     113kB time=00:00:03.03 bitrate= 303.9
    
***frame=  150 fps= 49 q=29.0 q=2.4 size=     126kB time=00:00:03.57 bitrate= 289.3
    
frame=  150 fps= 42 q=29.0 q=8.8 size=     126kB time=00:00:03.57 bitrate= 289.3
    
frame=  150 fps= 37 q=29.0 q=6.9 size=     126kB time=00:00:03.57 bitrate= 289.3
    
frame=  150 fps= 33 q=29.0 q=9.7 size=     126kB time=00:00:03.57 bitrate= 289.3
    
frame=  150 fps= 29 q=29.0 q=6.0 size=     126kB time=00:00:03.57 bitrate= 289.3
    
frame=  150 fps= 27 q=29.0 q=11.2 size=     126kB time=00:00:03.57 bitrate= 289.***
    
frame=  150 fps= 24 q=29.0 Lq=11.0 size=     171kB time=00:00:04.93 bitrate= 283
    
.7kbits/s
    
video:1282kB audio:225kB global headers:0kB muxing overhead -88.650217%
    
[libx264 @ 02b067a0] frame I:1     Avg QP:10.27  size:    74
    
[libx264 @ 02b067a0] frame P:114   Avg QP:23.49  size:   727
    
[libx264 @ 02b067a0] frame B:35    Avg QP:29.30  size:   124
    
[libx264 @ 02b067a0] consecutive B-frames: 68.0%  2.7%  0.0% 29.3%
    
[libx264 @ 02b067a0] mb I  I16..4: 100.0%  0.0%  0.0%
    
[libx264 @ 02b067a0] mb P  I16..4:  2.1%  3.2%  0.1%  P16..4: 19.2%  5.1%  3.6%
    
 0.0%  0.0%    skip:66.6%
    
[libx264 @ 02b067a0] mb B  I16..4:  0.2%  0.5%  0.0%  B16..8:  9.6%  1.2%  0.4%
    
 direct: 0.6%  skip:87.4%  L0:46.1% L1:42.5% BI:11.4%
    
[libx264 @ 02b067a0] 8x8 transform intra:51.7% inter:78.4%
    
[libx264 @ 02b067a0] coded y,uvDC,uvAC intra: 29.8% 44.5% 10.3% inter: 8.9% 10.3
    
% 2.2%
    
[libx264 @ 02b067a0] i16 v,h,dc,p: 52% 31% 16%  1%
    
[libx264 @ 02b067a0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 24% 25% 45%  1%  0%  1%  0%
    
 1%  3%
    
[libx264 @ 02b067a0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 17% 48% 23%  2%  1%  2%  3%
    
 2%  1%
    
[libx264 @ 02b067a0] i8c dc,h,v,p: 54% 26% 16%  3%
    
[libx264 @ 02b067a0] Weighted P-Frames: Y:2.6% UV:0.9%
    
[libx264 @ 02b067a0] ref P L0: 79.8%  7.0%  9.6%  3.6%  0.0%
    
[libx264 @ 02b067a0] ref B L0: 92.5%  6.7%  0.8%
    
[libx264 @ 02b067a0] ref B L1: 96.8%  3.2%
    
[libx264 @ 02b067a0] kb/s:139.51
    

    
D:\ffmpeg\bin>

    How is the correct syntax to get all output files same size ?

    isn't this a bug with ffmpeg ? (note last lines of conversion progress, which all timestamps look same)

    thanks in advance.

  • ffmpeg. Segmentation fault when input process end

    24 mars 2020, par mr.Nobody

    Im using xvfb-run with katalon cli command to execute selenium tests inside docker container (ubuntu 16)

    xvfb-run --listen-tcp --server-num 44 --auth-file /tmp/xvfb.auth -s '-ac -screen 0 1024x768x24' katalon -browserType=Firefox -retry=0 -statusDelay=15 -testSuitePath=Test Suites/Full_cases -runMode=console -reportFolder=/katalon/report -projectPath=/katalon/project.prj &

    and ffmpeg command to record video

    ffmpeg -y -f x11grab -video_size 1024x768 -i :44 -codec:v libx264 -r 12 /katalon/report/output_2.mp4

    But when the xvf-run process ends i have a ffmpeg segmentation fault error. Output file doesn’t save.

    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, x11grab, from ':44':
    
  Duration: N/A, start: 1584962410.149890, bitrate: N/A
    
    Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1024x768, 29.97 fps, 29.97 tbr, 1000k tbn, 29.97 tbc
    
No pixel format specified, yuv444p for H.264 encoding chosen.
    
Use -pix_fmt yuv420p for compatibility with outdated media players.
    
[libx264 @ 0x15e1a80] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
    
[libx264 @ 0x15e1a80] profile High 4:4:4 Predictive, level 3.1, 4:4:4 8-bit
    
[libx264 @ 0x15e1a80] 264 - core 148 r2643 5c65704 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - 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=4 threads=9 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=2 keyint=250 keyint_min=12 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
    
Output #0, mp4, to '/katalon/katalon/report/behat_2.mp4':
    
  Metadata:
    
    encoder         : Lavf56.40.101
    
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv444p, 1024x768, q=-1--1, 12 fps, 12288 tbn, 12 tbc
    
    Metadata:
    
      encoder         : Lavc56.60.100 libx264
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
    
Press [q] to stop, [?] for help
    
Segmentation fault2 q=26.0 size=     548kB time=00:00:53.08 bitrate=  84.5kbits/s dup=1 drop=1033

    My decision how to save video is send "q" keyword before the xvfb-run ends, but this is very uncomfortable

  • h.264 lossless video in python with ffmpeg

    7 mars 2015, par Ojtwist

    I have raw video files which I encoded via ffmpeg (lossless) :

    ffmpeg -i test.avi -c:v libx264 -preset veryslow -crf 0 output.mkv

    Now I tried to read these in python :

        FFMPEG_BIN = "ffmpeg"
    

    
    command = [FFMPEG_BIN,
    
                   '-i',path,
    
                   '-f', 'image2pipe',
    
                   '-pix_fmt','yuv444p',
    
                   '-r',framerate,
    
                   '-ss',startposition,
    
                   '-vcodec','rawvideo','-']
    

    
    pipe = sp.Popen(command,stdout=sp.PIPE,bufsize=10**8)
    

    
    while True:
    
        raw_image = pipe.stdout.read(640*480*3)
    

    
        image = np.fromstring(raw_image,dtype='uint8')
    

    
        image = image.reshape((480,640,3))

    I can’t find the good command to get the video lossless in python. If I try it as mentioned above and show it with matplotlib, I get :
    enter image description here

    If I set -vcodec to libx264 I get noise.

    enter image description here

    If i set -pix_fmt to rgb24, I get a normal looking image, but I can see some artifact due to the color conversion.

    What is the command I am looking for ?

    extra info, the output of the encoding (initial raw video ==> lossless h.264) :

    worker@worklati:~/data/DMG/test$ ffmpeg -i test.avi -c:v libx264 -preset veryslow -crf 0 output.mkv
    
ffmpeg version 2.5.3 Copyright (c) 2000-2015 the FFmpeg developers
    
  built on Jan 11 2015 17:53:45 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
    
  configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libpulse --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvo-aacenc --enable-libvidstab
    
  libavutil      54. 15.100 / 54. 15.100
    
  libavcodec     56. 13.100 / 56. 13.100
    
  libavformat    56. 15.102 / 56. 15.102
    
  libavdevice    56.  3.100 / 56.  3.100
    
  libavfilter     5.  2.103 /  5.  2.103
    
  libavresample   2.  1.  0 /  2.  1.  0
    
  libswscale      3.  1.101 /  3.  1.101
    
  libswresample   1.  1.100 /  1.  1.100
    
  libpostproc    53.  3.100 / 53.  3.100
    
Input #0, avi, from 'test.avi':
    
  Duration: 00:10:25.17, start: 0.000000, bitrate: 44237 kb/s
    
    Stream #0:0: Video: rawvideo, bgr24, 640x480, 6 fps, 6 tbr, 6 tbn, 6 tbc
    
File 'output.mkv' already exists. Overwrite ? [y/N] y
    
No pixel format specified, yuv444p for H.264 encoding chosen.
    
Use -pix_fmt yuv420p for compatibility with outdated media players.
    
[libx264 @ 0x1fd7160] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX AVX2 FMA3 LZCNT BMI2
    
[libx264 @ 0x1fd7160] profile High 4:4:4 Predictive, level 3.2, 4:4:4 8-bit
    
[libx264 @ 0x1fd7160] 264 - core 142 r2389 956c8d8 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - http://www.videolan.org/x264.html - options: cabac=1 ref=16 deblock=1:0:0 analyse=0x3:0x133 me=umh subme=9 psy=0 mixed_ref=1 me_range=24 chroma_me=1 trellis=0 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=0 chroma_qp_offset=0 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=2 keyint=250 keyint_min=6 scenecut=40 intra_refresh=0 rc=cqp mbtree=0 qp=0
    
Output #0, matroska, to 'output.mkv':
    
  Metadata:
    
    encoder         : Lavf56.15.102
    
    Stream #0:0: Video: h264 (libx264) (H264 / 0x34363248), yuv444p, 640x480, q=-1--1, 6 fps, 1k tbn, 6 tbc
    
    Metadata:
    
      encoder         : Lavc56.13.100 libx264
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
    
Press [q] to stop, [?] for help
    
frame= 3751 fps= 40 q=-1.0 Lsize=  133724kB time=00:10:25.16 bitrate=1752.3kbits/s    
    
video:133691kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.024307%
    
[libx264 @ 0x1fd7160] frame I:16    Avg QP: 0.00  size: 58298
    
[libx264 @ 0x1fd7160] frame P:3735  Avg QP: 0.00  size: 36403
    
[libx264 @ 0x1fd7160] mb I  I16..4: 65.3%  6.9% 27.7%
    
[libx264 @ 0x1fd7160] mb P  I16..4:  3.0%  2.1%  0.2%  P16..4: 71.2%  0.8% 22.4%  0.0%  0.0%    skip: 0.1%
    
[libx264 @ 0x1fd7160] 8x8 transform intra:36.9% inter:49.5%
    
[libx264 @ 0x1fd7160] coded y,u,v intra: 79.3% 0.0% 0.0% inter: 97.6% 0.0% 0.0%
    
[libx264 @ 0x1fd7160] i16 v,h,dc,p: 20%  3% 76%  1%
    
[libx264 @ 0x1fd7160] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu:  5%  8% 80%  1%  1%  2%  1%  1%  1%
    
[libx264 @ 0x1fd7160] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 28% 16%  5%  7%  8%  5%  4%  5%
    
[libx264 @ 0x1fd7160] Weighted P-Frames: Y:0.2% UV:0.0%
    
[libx264 @ 0x1fd7160] ref P L0: 63.2%  0.0% 14.2%  5.3%  4.0%  3.2%  2.6%  1.1%  1.0%  1.0%  0.9%  1.1%  0.7%  0.6%  0.6%  0.6%
    
[libx264 @ 0x1fd7160] kb/s:1751.85

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