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• QuTip Example 'bloch-sphere-animation' - video renders blank

  15 juillet 2018, par damien murphy.

  On MacOSX Using Python3 running the following example code provided without modification : https://github.com/qutip/qutip-notebooks/blob/master/examples/bloch-sphere-animation.ipynb

  I get a blank video and no errors.

  I have installed libav and ffmpeg so I am not sure what else is missing with any error.

  What codec did you install on mac when running these samples ?

  Looking at the source of qutip I can see what it is using to render the video : https://github.com/qutip/qutip/blob/master/qutip/ipynbtools.py#L392

  anim.save(name + '.mp4', fps=10, writer="avconv", codec="libx264")

  I have avconv on the command line working without errors

  This is the debug outout of matploylib.animation

  INFO:matplotlib.animation:Animation.save using DEBUG:matplotlib.animation:frame
  size in pixels is 576 x 576 INFO:matplotlib.animation:MovieWriter.run :
  running command : [’avconv’, ’-f’, ’rawvideo’, ’-vcodec’, ’rawvideo’,
  ’-s’, ’576x576’, ’-pix_fmt’, ’rgba’, ’-r’, ’10’, ’-i’, ’pipe :’,
  ’-vcodec’, ’libx264’, ’-y’, ’movie.mp4’]
  DEBUG:matplotlib.animation:MovieWriter.grab_frame : Grabbing frame.
  DEBUG:matplotlib.animation:MovieWriter.grab_frame : Grabbing frame.
  DEBUG:matplotlib.animation:MovieWriter.grab_frame : Grabbing frame.
  DEBUG:matplotlib.animation:MovieWriter.grab_frame : Grabbing frame.
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  DEBUG:matplotlib.animation:MovieWriter.grab_frame : Grabbing frame.
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  DEBUG:matplotlib.animation:MovieWriter.grab_frame : Grabbing frame.
  DEBUG:matplotlib.animation:MovieWriter.grab_frame : Grabbing frame.
  DEBUG:matplotlib.animation:MovieWriter.grab_frame : Grabbing frame.
  DEBUG:matplotlib.animation:MovieWriter.grab_frame : Grabbing frame.
  DEBUG:matplotlib.animation:MovieWriter.grab_frame : Grabbing frame.
  DEBUG:matplotlib.animation:MovieWriter — Command stdout : b’’
  DEBUG:matplotlib.animation:MovieWriter — Command stderr : b"avconv
  version 12.3, Copyright (c) 2000-2018 the Libav developers\n built on
  Feb 13 2018 11:17:07 with Apple LLVM version 9.0.0
  (clang-900.0.39.2)\n[rawvideo @ 0x7f963c000000] Estimating duration
  from bitrate, this may be inaccurate\nInput #0, rawvideo, from
  ’pipe :’ :\n Duration : N/A, start : 0.000000, bitrate : N/A\n Stream

  0:0 : Video : rawvideo\n rgba, 576x576\n 10 fps, 10 tbn\nStream mapping :\n Stream #0:0 -> #0:0 (rawvideo (native) -> h264

  (libx264))\nPress ctrl-c to stop encoding\n[libx264 @ 0x7f963e001800]
  using cpu capabilities : MMX2 SSE2Fast SSSE3 SSE4.2 AVX\n[libx264 @
  0x7f963e001800] profile High, level 2.2\n[libx264 @ 0x7f963e001800]
  264 - core 152 r2854 e9a5903 - H.264/MPEG-4 AVC codec - Copyleft
  2003-2017 - 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=10 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\nOutput #0, mp4, to ’movie.mp4’ :\n Metadata :\n encoder
   : Lavf57.7.2\n Stream #0:0 : Video : h264 [[33][0][0][0] / 0x0021]\n
  yuv420p, 576x576, q=2-31\n 10 fps, 10 tbn\n Metadata :\n
  encoder : Lavc57.25.0 libx264\n Side data :\n cpb :
  bitrate max/min/avg : 0/0/0 buffer size : 0 vbv_delay : -1\nframe= 6
  fps= 0 q=0.0 size= 0kB time=10000000000.00 bitrate=
  0.0kbits/s \rframe= 10 fps= 8 q=0.0 size= 0kB time=10000000000.00 bitrate= 0.0kbits/s \rframe= 13 fps= 7
  q=0.0 size= 0kB time=10000000000.00 bitrate= 0.0kbits/s
  \rframe= 16 fps= 7 q=0.0 size= 0kB time=10000000000.00
  bitrate= 0.0kbits/s \rframe= 19 fps= 6 q=0.0 size= 0kB
  time=10000000000.00 bitrate= 0.0kbits/s \rframe= 22 fps= 6
  q=0.0 size= 0kB time=10000000000.00 bitrate= 0.0kbits/s
  \rframe= 26 fps= 6 q=0.0 size= 0kB time=10000000000.00
  bitrate= 0.0kbits/s \rframe= 30 fps= 6 q=0.0 size= 0kB
  time=10000000000.00 bitrate= 0.0kbits/s \rframe= 33 fps= 6
  q=0.0 size= 0kB time=10000000000.00 bitrate= 0.0kbits/s
  \rframe= 36 fps= 6 q=0.0 size= 0kB time=10000000000.00
  bitrate= 0.0kbits/s \rframe= 39 fps= 6 q=0.0 size= 0kB
  time=10000000000.00 bitrate= 0.0kbits/s \rframe= 42 fps= 6
  q=0.0 size= 0kB time=10000000000.00 bitrate= 0.0kbits/s
  \rframe= 45 fps= 6 q=0.0 size= 0kB time=10000000000.00
  bitrate= 0.0kbits/s \rframe= 48 fps= 6 q=0.0 size= 0kB
  time=10000000000.00 bitrate= 0.0kbits/s \rframe= 51 fps= 6
  q=0.0 size= 0kB time=10000000000.00 bitrate= 0.0kbits/s
  \rframe= 55 fps= 6 q=0.0 size= 0kB time=10000000000.00
  bitrate= 0.0kbits/s \rframe= 59 fps= 6 q=25.0 size= 1kB
  time=10000000000.00 bitrate= 0.0kbits/s \rframe= 63 fps= 6
  q=25.0 size= 1kB time=0.40 bitrate= 19.8kbits/s \rframe=
  67 fps= 6 q=25.0 size= 1kB time=0.80 bitrate= 10.9kbits/s
  \rframe= 71 fps= 6 q=25.0 size= 1kB time=1.20 bitrate=
  7.9kbits/s \rframe= 75 fps= 6 q=25.0 size= 1kB time=1.60 bitrate= 6.4kbits/s \rframe= 79 fps= 6 q=25.0 size= 1kB
  time=2.00 bitrate= 5.5kbits/s \rframe= 82 fps= 6 q=25.0 size=
  1kB time=2.30 bitrate= 5.0kbits/s \rframe= 86 fps= 6 q=25.0
  size= 2kB time=2.70 bitrate= 4.6kbits/s \rframe= 90 fps=
  6 q=25.0 size= 2kB time=3.10 bitrate= 4.2kbits/s \rframe=
  93 fps= 6 q=25.0 size= 2kB time=3.40 bitrate= 4.0kbits/s
  \rframe= 97 fps= 6 q=25.0 size= 2kB time=3.80 bitrate=
  3.8kbits/s \rframe= 101 fps= 6 q=25.0 size= 2kB time=4.20 bitrate= 3.6kbits/s \rframe= 105 fps= 6 q=25.0 size= 2kB
  time=4.60 bitrate= 3.4kbits/s \rframe= 109 fps= 6 q=25.0 size=
  2kB time=5.00 bitrate= 3.3kbits/s \rframe= 112 fps= 6 q=25.0
  size= 2kB time=5.30 bitrate= 3.2kbits/s \rframe= 116 fps=
  6 q=25.0 size= 2kB time=5.70 bitrate= 3.2kbits/s \rframe=
  120 fps= 6 q=25.0 size= 2kB time=6.10 bitrate= 3.1kbits/s
  \rframe= 123 fps= 6 q=25.0 size= 2kB time=6.40 bitrate=
  3.0kbits/s \rframe= 126 fps= 6 q=25.0 size= 2kB time=6.70 bitrate= 3.0kbits/s \rframe= 129 fps= 6 q=25.0 size= 2kB
  time=7.00 bitrate= 2.9kbits/s \rframe= 132 fps= 6 q=25.0 size=
  3kB time=7.30 bitrate= 2.9kbits/s \rframe= 135 fps= 6 q=25.0
  size= 3kB time=7.60 bitrate= 2.8kbits/s \rframe= 138 fps=
  6 q=25.0 size= 3kB time=7.90 bitrate= 2.8kbits/s \rframe=
  141 fps= 6 q=25.0 size= 3kB time=8.20 bitrate= 2.8kbits/s
  \rframe= 144 fps= 6 q=25.0 size= 3kB time=8.50 bitrate=
  2.7kbits/s \rframe= 148 fps= 6 q=25.0 size= 3kB time=8.90 bitrate= 2.7kbits/s \rframe= 150 fps= 6 q=-1.0 Lsize= 7kB
  time=14.70 bitrate= 4.1kbits/s \r\nvideo:4kB audio:0kB other
  streams:0kB global headers:0kB muxing overhead : 74.948143%\n[libx264 @
  0x7f963e001800] frame I:1 Avg QP : 6.00 size : 112\n[libx264 @
  0x7f963e001800] frame P:38 Avg QP : 6.21 size : 30\n[libx264 @
  0x7f963e001800] frame B:111 Avg QP : 9.67 size : 22\n[libx264 @
  0x7f963e001800] consecutive B-frames : 1.3% 0.0% 0.0%
  98.7%\n[libx264 @ 0x7f963e001800] mb I I16..4 : 100.0% 0.0% 0.0%\n[libx264 @ 0x7f963e001800] mb P I16..4 : 0.0% 0.0% 0.0% P16..4 : 0.0% 0.0% 0.0% 0.0% 0.0% skip:100.0%\n[libx264 @
  0x7f963e001800] mb B I16..4 : 0.0% 0.0% 0.0% B16..8 : 0.0% 0.0%
  0.0% direct : 0.0% skip:100.0%\n[libx264 @ 0x7f963e001800] 8x8 transform intra:0.0%\n[libx264 @ 0x7f963e001800] coded y,uvDC,uvAC
  intra : 0.0% 0.0% 0.0% inter : 0.0% 0.0% 0.0%\n[libx264 @
  0x7f963e001800] i16 v,h,dc,p : 97% 0% 3% 0%\n[libx264 @
  0x7f963e001800] i8c dc,h,v,p : 100% 0% 0% 0%\n[libx264 @
  0x7f963e001800] Weighted P-Frames : Y:0.0% UV:0.0%\n[libx264 @
  0x7f963e001800] kb/s:1.95\n"

• I want to use image as a background of a drawtext video using ffmpeg

  8 janvier 2018, par Femzy

  Currently i am able to create video with ffmpeg using the drawtext filters to draw text on a black background Now Remain one thing that seems difficult to me, I thought it would be easy until i come to discover i don’t got it right. I want to use an image as background for the drawtext filters. I.e I want to use image as background of the video instead of using the background color or video background. Please someone should take me through on this this is my code `

  echo shell_exec('ffmpeg -f lavfi -i color=color=black -vf drawtext="textfile=text.txt:expansion=normal:fontfile=FreeSerif.otf: y=h-line_h-20:x=-100*t: fontcolor=white: fontsize=50" -t '.$words_count.' textover09.mp4 -report'); `

  ffmpeg started on 2018-01-07 at 22:53:03
  
  Report written to "ffmpeg-20180107-225303.log"
  
  Command line:
  
  ffmpeg -loop 1 -i elena.jpg -vf "drawtext=textfile=text.txt:expansion=normal:fontfile=FreeSerif.otf: y=h-line_h-20:x=-100*t: fontcolor=white: fontsize=50" -t 46.2 textover09.mp4 -report
  
  ffmpeg version git-2017-12-28-be4dfbf Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-18)
  
    configuration: --prefix=/usr/local/ffmpeg --extra-cflags=-I/usr/local/ffmpeg/include --extra-ldflags=-L/usr/local/ffmpeg/lib --bindir=/usr/local/bin --enable-gpl --enable-nonfree --enable-libfdk_aac --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libx264 --enable-libtheora --enable-filter=drawtext --enable-libfreetype
  
    libavutil      56.  7.100 / 56.  7.100
  
    libavcodec     58.  9.100 / 58.  9.100
  
    libavformat    58.  3.100 / 58.  3.100
  
    libavdevice    58.  0.100 / 58.  0.100
  
    libavfilter     7.  8.100 /  7.  8.100
  
    libswscale      5.  0.101 /  5.  0.101
  
    libswresample   3.  0.101 /  3.  0.101
  
    libpostproc    55.  0.100 / 55.  0.100
  
  Splitting the commandline.
  
  Reading option '-loop' ... matched as AVOption 'loop' with argument '1'.
  
  Reading option '-i' ... matched as input url with argument 'elena.jpg'.
  
  Reading option '-vf' ... matched as option 'vf' (set video filters) with argument 'drawtext=textfile=text.txt:expansion=normal:fontfile=FreeSerif.otf: y=h-line_h-20:x=-100*t: fontcolor=white: fontsize=50'.
  
  Reading option '-t' ... matched as option 't' (record or transcode "duration" seconds of audio/video) with argument '46.2'.
  
  Reading option 'textover09.mp4' ... matched as output url.
  
  Reading option '-report' ... matched as option 'report' (generate a report) with argument '1'.
  
  Finished splitting the commandline.
  
  Parsing a group of options: global .
  
  Applying option report (generate a report) with argument 1.
  
  Successfully parsed a group of options.
  
  Parsing a group of options: input url elena.jpg.
  
  Successfully parsed a group of options.
  
  Opening an input file: elena.jpg.
  
  [NULL @ 0x2c1fe80] Opening 'elena.jpg' for reading
  
  [file @ 0x2c207c0] Setting default whitelist 'file,crypto'
  
  [image2 @ 0x2c1fe80] Format image2 probed with size=2048 and score=50
  
  [image2 @ 0x2c1fe80] Before avformat_find_stream_info() pos: 0 bytes read:32768 seeks:0 nb_streams:1
  
  [image2 @ 0x2c1fe80] Opening 'elena.jpg' for reading
  
  [AVIOContext @ 0x2c21f80] Statistics: 3871771 bytes read, 0 seeks
  
  [mjpeg @ 0x2c21940] marker=d8 avail_size_in_buf=3871769
  
  [mjpeg @ 0x2c21940] marker parser used 0 bytes (0 bits)
  
  [mjpeg @ 0x2c21940] marker=e0 avail_size_in_buf=3871767
  
  [mjpeg @ 0x2c21940] marker parser used 16 bytes (128 bits)
  
  [mjpeg @ 0x2c21940] marker=e2 avail_size_in_buf=3871749
  
  [mjpeg @ 0x2c21940] marker parser used 3160 bytes (25280 bits)
  
  [mjpeg @ 0x2c21940] marker=db avail_size_in_buf=3868587
  
  [mjpeg @ 0x2c21940] index=0
  
  [mjpeg @ 0x2c21940] qscale[0]: 2
  
  [mjpeg @ 0x2c21940] index=1
  
  [mjpeg @ 0x2c21940] qscale[1]: 2
  
  [mjpeg @ 0x2c21940] marker parser used 132 bytes (1056 bits)
  
  [mjpeg @ 0x2c21940] marker=c0 avail_size_in_buf=3868453
  
  [mjpeg @ 0x2c21940] Changing bps from 0 to 8
  
  [mjpeg @ 0x2c21940] sof0: picture: 5616x3744
  
  [mjpeg @ 0x2c21940] component 0 2:2 id: 0 quant:0
  
  [mjpeg @ 0x2c21940] component 1 1:1 id: 1 quant:1
  
  [mjpeg @ 0x2c21940] component 2 1:1 id: 2 quant:1
  
  [mjpeg @ 0x2c21940] pix fmt id 22111100
  
  [mjpeg @ 0x2c21940] marker parser used 17 bytes (136 bits)
  
  [mjpeg @ 0x2c21940] marker=c4 avail_size_in_buf=3868434
  
  [mjpeg @ 0x2c21940] marker parser used 0 bytes (0 bits)
  
  [mjpeg @ 0x2c21940] escaping removed 6222 bytes
  
  [mjpeg @ 0x2c21940] marker=da avail_size_in_buf=3868014
  
  [mjpeg @ 0x2c21940] marker parser used 3861792 bytes (30894336 bits)
  
  [mjpeg @ 0x2c21940] marker=d9 avail_size_in_buf=0
  
  [mjpeg @ 0x2c22540] marker parser used 132 bytes (1056 bits)
  
  [mjpeg @ 0x2c22540] marker=c0 avail_size_in_buf=3868453
  
  [mjpeg @ 0x2c22540] sof0: picture: 5616x3744
  
  [mjpeg @ 0x2c22540] component 0 2:2 id: 0 quant:0
  
  [mjpeg @ 0x2c22540] component 1 1:1 id: 1 quant:1
  
  [libx264 @ 0x2c24c40] i16 v,h,dc,p: 40% 53%  4%  3%
  
  [libx264 @ 0x2c24c40] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 11% 10% 27%  7%  9%  8%  8%  9% 11%
  
  [libx264 @ 0x2c24c40] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 29% 12% 11%  6%  9% 11%  7%  9%  6%
  
  [libx264 @ 0x2c24c40] i8c dc,h,v,p: 53% 17% 21%  8%
  
  [libx264 @ 0x2c24c40] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 0x2c24c40] ref P L0: 56.3%  9.9% 21.1% 12.8%
  
  [libx264 @ 0x2c24c40] ref B L0: 74.5% 22.4%  3.1%
  
  [libx264 @ 0x2c24c40] ref B L1: 98.3%  1.7%
  
  [libx264 @ 0x2c24c40] kb/s:4673.55
  
  [AVIOContext @ 0x2c28ac0] Statistics: 32768 bytes read, 0 seeks

• Anomalie #4159 (Nouveau) : empêcher l’upgrade en 3.1 si le code n’est plus compatible avec la vers...

  11 juillet 2018, par touti touti

  Concernant la version PHP, il reste encore 49% des sites SPIP en PHP5.3 …

  Il faudrait peut-être comme sur la 3.2 empêcher l’upgrade en 3.1 si il y a incompatibilité avec la version PHP ?

  voir https://blog.spip.net/Statistiques-Mars-2018.html

  et notamment https://blog.spip.net/local/cache-vignettes/L672xH398/repartition_php_2018-03-22-19445.png?153004875...