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• tools/python : add script to convert TensorFlow model (.pb) to native model (.model)

  13 juin 2019, par Guo, Yejun

  tools/python : add script to convert TensorFlow model (.pb) to native model (.model)
  For example, given TensorFlow model file espcn.pb,
  
  to generate native model file espcn.model, just run :
  
  python convert.py espcn.pb
  In current implementation, the native model file is generated for
  
  specific dnn network with hard-code python scripts maintained out of ffmpeg.
  
  For example, srcnn network used by vf_sr is generated with
  
  https://github.com/HighVoltageRocknRoll/sr/blob/master/generate_header_and_model.py#L85
  In this patch, the script is designed as a general solution which
  
  converts general TensorFlow model .pb file into .model file. The script
  
  now has some tricky to be compatible with current implemention, will
  
  be refined step by step.
  The script is also added into ffmpeg source tree. It is expected there
  
  will be many more patches and community needs the ownership of it.
  Another technical direction is to do the conversion in c/c++ code within
  
  ffmpeg source tree. While .pb file is organized with protocol buffers,
  
  it is not easy to do such work with tiny c/c++ code, see more discussion
  
  at http://ffmpeg.org/pipermail/ffmpeg-devel/2019-May/244496.html. So,
  
  choose the python script.
  Signed-off-by : Guo, Yejun <yejun.guo@intel.com>
  

  • [DH] .gitignore
  • [DH] tools/python/convert.py
  • [DH] tools/python/convert_from_tensorflow.py

• Can't synchronize frame from two webcam streams side by side using ffmpeg

  15 juin 2019, par Peppe

  i’m trying to stream two webcam in sbs mode using ffmpeg websocket.

  It works but there is a delay of some second between the two scene.

  Here is what I do :

  ffmpeg -f v4l2   -framerate 30 -video_size 1280x720 -input_format mjpeg 
  
  -i /dev/video1 -f v4l2 -framerate 30  -input_format mjpeg 
  
  -video_size 1280x720 -i /dev/video0 -filter_complex "
  
  [0:v][1:v]hstack [left+right]" -map [left+right] -r 30 -fflags nobuffer 
  
  -f mpegts -codec:v mpeg1video -s 2560x720 -b:v 800k -bf 0 http://localhost:8081/secretsecret

  And this is the output :

  ffmpeg version 4.1.3-0ubuntu1 Copyright (c) 2000-2019 the FFmpeg developers
  
    built with gcc 8 (Ubuntu 8.3.0-6ubuntu1)
  
    configuration: --prefix=/usr --extra-version=0ubuntu1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable- libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  
    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, video4linux2,v4l2, from '/dev/video2':
  
      Duration: N/A, start: 9539.835119, bitrate: N/A
  
      Stream #0:0: Video: mjpeg, yuvj422p(pc, bt470bg/unknown/unknown), 1280x720, 25 fps, 25 tbr, 1000k tbn, 1000k tbc
  
  Input #1, video4linux2,v4l2, from '/dev/video4':
  
    Duration: N/A, start: 9541.474622, bitrate: N/A
  
      Stream #1:0: Video: mjpeg, yuvj422p(pc, bt470bg/unknown/unknown), 1280x720, 25 fps, 25 tbr, 1000k tbn, 1000k tbc
  
  Stream mapping:
  
    Stream #0:0 (mjpeg) -> hstack:input0
  
    Stream #1:0 (mjpeg) -> hstack:input1
  
    hstack -> Stream #0:0 (mpeg1video)
  
  Press [q] to stop, [?] for help
  
  [swscaler @ 0x55aa2c266f00] deprecated pixel format used, make sure you did set range correctly
  
  Output #0, mpegts, to 'http://localhost:8081/supersecret':
  
    Metadata:
  
  encoder         : Lavf58.20.100
  
  Stream #0:0: Video: mpeg1video, yuv420p, 2560x720, q=2-31, 800 kb/s, 25 fps, 90k tbn, 25 tbc (default)
  
  Metadata:
  
    encoder         : Lavc58.35.100 mpeg1video
  
  Side data:
  
    cpb: bitrate max/min/avg: 0/0/800000 buffer size: 0 vbv_delay: -1
  
  [video4linux2,v4l2 @ 0x55aa2c1d4e40] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)

  It works but there is a delay of 1 second between the two screens.

  also tried with :

  ffmpeg -f v4l2 -framerate 25 -video_size 1280x720 -input_format mjpeg -i \
  
  /dev/video2 -f v4l2 -framerate 25  -input_format mjpeg -video_size 1280x720 \
  
  -i /dev/video4 -filter_complex " \
  
  nullsrc=size=2560x720 [background]; \
  
  [0:v] setpts=PTS-STARTPTS, scale=1280x720 [left]; \
  
  [1:v] setpts=PTS-STARTPTS, scale=1280x720 [right]; \
  
  [background][left]       overlay=shortest=1       [background+left]; \
  
  [background+left][right] overlay=shortest=1:x=1280 [left+right] \
  
  " -map [left+right] -f mpegts -codec:v mpeg1video -s 2560x720 -b:v 800k -bf 0     http://localhost:8081/supersecret

  but same problem....
  How can I fix ?

• subprocess call of ffmpeg returns negative value

  11 juin 2019, par Zak44

  Here is the original command line call that works at shell :

  ffmpeg -i /Users/abc/Desktop/Test/Full_Mov.mov -vf "drawtext=fontfile=/System/Library/Fonts/Keyboard.ttf: text='SCENE BLAH BLAH - %{frame_num}': start_number=1: x=(w-tw)/2: y=h-(2*lh): fontcolor=white: fontsize=20: box=1: boxcolor=black: boxborderw=5","format=yuv420p" -f segment -segment_frames 123 -reset_timestamps 1 -c:a copy -map 0 "/Users/abc/Desktop/Test/%03d_test40.mov"

  Getting a negative value when trying to run ffmpeg via subprocess, causing it to fail and not process. I’ve even tried dumbing down the call to just run ffmpeg by itself with no arguments, and it still returns a negative value.

  import subprocess
  
  ffmpeg = "/usr/local/bin/ffmpeg"
  
  source = "/Users/abc/Desktop/Test/Full_Mov.mov"
  
  destination = "/Users/abc/Desktop/Test/%03d_test40.mov"
  
  cmd = "%s -i %s -vf \"drawtext=fontfile=/System/Library/Fonts/Keyboard.ttf: text='SCENE BLAH BLAH - %%{frame_num}': start_number=1: x=(w-tw)/2: y=h-(2*lh): fontcolor=black: fontsize=20: box=1: boxcolor=white: boxborderw=5\",\"format=yuv420p\" -f segment -segment_frames 123 -reset_timestamps 1 -c:a copy -map 0 \"%s\"" % (ffmpeg, source, destination)
  
  log("ffmpeg cmd: %s" % cmd)
  
  log(subprocess.check_output(cmd, shell=True))

  When running full command :

  CalledProcessError: Command '/usr/local/bin/ffmpeg -i /Users/abc/Desktop/Full_Mov.mov -vf "drawtext=fontfile=/System/Library/Fonts/Keyboard.ttf: text='SCENE BLAH BLAH - %{frame_num}': start_number=1: x=(w-tw)/2: y=h-(2*lh): fontcolor=black: fontsize=20: box=1: boxcolor=white: boxborderw=5","format=yuv420p" -f segment -segment_frames 318 -reset_timestamps 1 -c:a copy -map 0 "/Users/abc/Desktop/Test/%03d.tmp.mov"' returned non-zero exit status -8
  
      raise CalledProcessError(retcode, cmd, output=output)

  When running just ffmpeg no arguments :

  CalledProcessError: Command '/usr/local/bin/ffmpeg' returned non-zero exit status 1
  
      raise CalledProcessError(retcode, cmd, output=output)

  Latest output with suggested changes below :

  subprocess.CalledProcessError: Command '['/usr/local/bin/ffmpeg', '-i', '/Users/szaharak/Desktop/Flix_Test/ep888_sq66_main_mov_2019_05_20_14_15.mov', '-vf', 'drawtext=fontfile=/System/Library/Fonts/Keyboard.ttf:', 'text=SCENE BLAH BLAH - %%{frame_num}:', 'start_number=1:', 'x=(w-tw)/2:', 'y=h-(2*lh):', 'fontcolor=black:', 'fontsize=20:', 'box=1:', 'boxcolor=white:', 'boxborderw=5', 'format=yuv420p', '-f', 'segment', '-segment_frames', '123', '-reset_timestamps', '1', '-c:a', 'copy', '-map', '0', '/Users/szaharak/Desktop/Flix_Test/%03d_test40.mov']' returned non-zero exit status 1
  
  
  
  [NULL @ 0x7f88c3012200] Unable to find a suitable output format for 'text=SCENE BLAH BLAH - %%{frame_num}:'
  
  text=SCENE BLAH BLAH - %%{frame_num}:: Invalid argument

  And here is latest...

      >>> rc = subprocess.check_call(cmd)
  
  ffmpeg version N-93891-ge1839283bc-tessus  https://evermeet.cx/ffmpeg/  Copyright (c) 2000-2019 the FFmpeg developers
  
    built with Apple LLVM version 10.0.1 (clang-1001.0.46.4)
  
    configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libmysofa --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-version3 --pkg-config-flags=--static --disable-ffplay
  
  
  
    libavutil      56. 28.100 / 56. 28.100
  
    libavcodec     58. 52.102 / 58. 52.102
  
    libavformat    58. 27.103 / 58. 27.103
  
    libavdevice    58.  7.100 / 58.  7.100
  
    libavfilter     7. 53.101 /  7. 53.101
  
    libswscale      5.  4.101 /  5.  4.101
  
    libswresample   3.  4.100 /  3.  4.100
  
    libpostproc    55.  4.100 / 55.  4.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/szaharak/Desktop/Flix_Test/ep888_sq66_main_mov_2019_05_20_14_15.mov':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 537199360
  
      compatible_brands: qt  
  
      creation_time   : 2019-05-14T17:58:24.000000Z
  
      com.apple.quicktime.player.movie.audio.gain: 1.000000
  
      com.apple.quicktime.player.movie.audio.treble: 0.000000
  
      com.apple.quicktime.player.movie.audio.bass: 0.000000
  
      com.apple.quicktime.player.movie.audio.balance: 0.000000
  
      com.apple.quicktime.player.movie.audio.pitchshift: 0.000000
  
      com.apple.quicktime.player.movie.audio.mute: 
  
      com.apple.quicktime.player.movie.visual.brightness: 0.000000
  
      com.apple.quicktime.player.movie.visual.color: 1.000000
  
      com.apple.quicktime.player.movie.visual.tint: 0.000000
  
      com.apple.quicktime.player.movie.visual.contrast: 1.000000
  
      com.apple.quicktime.player.version: 7.6.6 (7.6.6)
  
      com.apple.quicktime.version: 7.7.3 (2943.14) 0x7738000 (Mac OS X, 10.11.6, 15G22010)
  
    Duration: 00:01:12.67, start: 0.000000, bitrate: 23379 kb/s
  
      Stream #0:0(eng): Video: mjpeg (Baseline) (jpeg / 0x6765706A), yuvj422p(pc, bt470bg/unknown/unknown), 1280x720 [SAR 72:72 DAR 16:9], 21838 kb/s, 24 fps, 24 tbr, 24k tbn, 24k tbc (default)
  
      Metadata:
  
        creation_time   : 2019-05-14T17:58:24.000000Z
  
        handler_name    : Apple Video Media Handler
  
        encoder         : Photo - JPEG
  
      Stream #0:1(eng): Audio: pcm_s16be (twos / 0x736F7774), 48000 Hz, stereo, s16, 1536 kb/s (default)
  
      Metadata:
  
        creation_time   : 2019-05-14T17:58:24.000000Z
  
        handler_name    : Apple Sound Media Handler
  
  [NULL @ 0x7f8ddc8ce200] Unable to find a suitable output format for 'text=SCENE BLAH BLAH - %{frame_num}: start_number=1: x=(w-tw)/2: y=h-(2*lh): fontcolor=black: fontsize=20: box=1: boxcolor=white: boxborderw=5: format=yuv420p'
  
  text=SCENE BLAH BLAH - %{frame_num}: start_number=1: x=(w-tw)/2: y=h-(2*lh): fontcolor=black: fontsize=20: box=1: boxcolor=white: boxborderw=5: format=yuv420p: Invalid argument
  
  Traceback (most recent call last):
  
    File "<stdin>", line 1, in <module>
  
    File "/usr/local/Cellar/python@2/2.7.15_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 190, in check_call
  
      raise CalledProcessError(retcode, cmd)
  
  subprocess.CalledProcessError: Command '['/usr/local/bin/ffmpeg', '-i', '/Users/szaharak/Desktop/Flix_Test/ep888_sq66_main_mov_2019_05_20_14_15.mov', '-vf', 'drawtext=fontfile=/System/Library/Fonts/Keyboard.ttf:', 'text=SCENE BLAH BLAH - %{frame_num}: start_number=1: x=(w-tw)/2: y=h-(2*lh): fontcolor=black: fontsize=20: box=1: boxcolor=white: boxborderw=5: format=yuv420p', '-f', 'segment', '-segment_frames', '123', '-reset_timestamps', '1', '-c:a', 'copy', '-map', '0', '/Users/szaharak/Desktop/Flix_Test/%03d_test40.mov']' returned non-zero exit status 1
  
  </module></stdin>