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• ffmpeg converting JPG slideshow to MKV

  17 décembre 2018, par phol

  I am trying to convert a set of jpg files to a slideshow with varying durations using ffconcat

  output.txt contents :

  ffconcat version 1.0
  
  file slide_0001.jpg
  
  duration 0.163
  
  file slide_0002.jpg
  
  duration 0.533
  
  file slide_0003.jpg
  
  duration 1.067
  
  file slide_0004.jpg
  
  duration 0.533
  
  file slide_0005.jpg
  
  etc.

  FFmpeg command :

  ffmpeg -i output.txt output.mkv

  I also tried :

  ffmpeg -i output.txt -c:v copy output.mkv

  However, when converting, the colours of the images become skewed.
  White becomes pink / purple and dark green becomes light green.
  The same happens when choosing different codecs and containers.
  Is there a way to solve this ?

  EDIT :
  I performed the same conversion again. I attached the log output as requested.
  However, in the meantime I have figured out that converting without ffconcat duration and then altering timecodes with mp4fpsmod is more efficient in terms of storage (3 vs 40 MB) and gives less issues in different players. The result is nonetheless the same : colours are still wrong, both on my workstation (Ubuntu 18.04) and laptop (macOS Mojave).

  I tried to alter things with pix_fmt and -vf format as can be seen in the second log output. This did not solve the problem.

  Background info :
  The input jpg files are from a lecture recording made with MediaSite, which has both a video stream for the room as well as this slideshow stream for the slides.

  Example of input :
  
  Example of output :
  
  log output MKV conversion :

      $ ffmpeg -i outputnew.txt output12345.mkv
  
  ffmpeg version 4.1 Copyright (c) 2000-2018 the FFmpeg developers
  
  built with Apple LLVM version 10.0.0 (clang-1000.11.45.5)
  
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.1 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gpl --enable-libmp3lame --enable-libopus --enable-libsnappy --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-opencl --enable-videotoolbox
  
  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, concat, from 'outputnew.txt':
  
  Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1280x720, 25 tbr, 25 tbn, 25 tbc
  
  Stream mapping:
  
  Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  [libx264 @ 0x7fb284802800] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
  [libx264 @ 0x7fb284802800] profile High 4:4:4 Predictive, level 3.1, 4:4:4 8-bit
  
  [libx264 @ 0x7fb284802800] 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=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=4 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=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, matroska, to 'output12345.mkv':
  
  Metadata:
  
      encoder         : Lavf58.20.100
  
      Stream #0:0: Video: h264 (libx264) (H264 / 0x34363248), yuvj444p(pc), 1280x720, q=-1--1, 25 fps, 1k tbn, 25 tbc
  
      Metadata:
  
      encoder         : Lavc58.35.100 libx264
  
      Side data:
  
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
  [mjpeg @ 0x7fb284061200] EOI missing, emulating=00:02:12.96 bitrate= 491.3kbits/s speed=14.3x        
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte= 487.2kbits/s speed=14.3x    
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte= 333.0kbits/s speed=22.3x    
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte= 338.8kbits/s speed=22.7x    
  
      Last message repeated 2 times
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte= 164.7kbits/s speed=41.6x    
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte= 122.7kbits/s speed=55.7x    
  
      Last message repeated 1 times
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte= 111.2kbits/s speed=60.5x    
  
      Last message repeated 1 times
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte= 105.3kbits/s speed=64.4x    
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  82.2kbits/s speed=82.7x    
  
      Last message repeated 1 times
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  79.7kbits/s speed=85.8x    
  
      Last message repeated 2 times
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  59.7kbits/s speed= 114x    
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  53.8kbits/s speed= 127x    
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  54.7kbits/s speed= 124x    
  
      Last message repeated 1 times
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  47.1kbits/s speed= 143x    
  
      Last message repeated 1 times
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  47.0kbits/s speed= 144x    
  
      Last message repeated 1 times
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  44.6kbits/s speed= 151x    
  
      Last message repeated 1 times
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  34.4kbits/s speed= 194x    
  
      Last message repeated 2 times
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  32.9kbits/s speed= 204x    
  
      Last message repeated 2 times
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  32.8kbits/s speed= 203x    
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  32.6kbits/s speed= 202x    
  
      Last message repeated 1 times
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  28.8kbits/s speed= 229x    
  
      Last message repeated 2 times
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  27.9kbits/s speed= 236x    
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  27.9kbits/s speed= 233x    
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  23.9kbits/s speed= 274x    
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  24.2kbits/s speed= 273x    
  
      Last message repeated 2 times
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  24.2kbits/s speed= 274x    
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  24.0kbits/s speed= 276x    
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  24.2kbits/s speed= 273x    
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  23.6kbits/s speed= 278x    
  
      Last message repeated 1 times
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  23.7kbits/s speed= 279x    
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  23.6kbits/s speed= 279x    
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  24.0kbits/s speed= 276x    
  
      Last message repeated 1 times
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  23.5kbits/s speed= 281x    
  
      Last message repeated 1 times
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  20.4kbits/s speed= 325x    
  
  [mjpeg @ 0x7fb28502a000] EOI missing, emulating
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  20.1kbits/s speed= 329x    
  
      Last message repeated 1 times
  
  [matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  20.1kbits/s speed= 330x    
  
  frame=  635 fps= 14 q=-1.0 Lsize=   37389kB time=04:22:06.76 bitrate=  19.5kbits/s speed= 343x    
  
  video:37378kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.029620%
  
  [libx264 @ 0x7fb284802800] frame I:16    Avg QP:11.98  size:154224
  
  [libx264 @ 0x7fb284802800] frame P:184   Avg QP:13.30  size: 79029
  
  [libx264 @ 0x7fb284802800] frame B:435   Avg QP:13.19  size: 48887
  
  [libx264 @ 0x7fb284802800] consecutive B-frames:  6.0%  4.4% 10.9% 78.7%
  
  [libx264 @ 0x7fb284802800] mb I  I16..4: 55.7%  0.0% 44.3%
  
  [libx264 @ 0x7fb284802800] mb P  I16..4: 32.4%  0.0% 21.5%  P16..4: 13.3% 15.1% 11.3%  0.0%  0.0%    skip: 6.4%
  
  [libx264 @ 0x7fb284802800] mb B  I16..4: 17.8%  0.0%  7.2%  B16..8: 19.1% 19.4%  6.5%  direct:14.6%  skip:15.3%  L0:47.0% L1:38.9% BI:14.1%
  
  [libx264 @ 0x7fb284802800] coded y,u,v intra: 63.7% 26.1% 56.3% inter: 46.5% 24.6% 43.5%
  
  [libx264 @ 0x7fb284802800] i16 v,h,dc,p: 19% 18% 58%  4%
  
  [libx264 @ 0x7fb284802800] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 35% 20% 25%  4%  4%  3%  3%  3%  3%
  
  [libx264 @ 0x7fb284802800] Weighted P-Frames: Y:5.4% UV:5.4%
  
  [libx264 @ 0x7fb284802800] ref P L0: 43.2%  4.4% 30.8% 21.4%  0.2%
  
  [libx264 @ 0x7fb284802800] ref B L0: 64.1% 27.3%  8.6%
  
  [libx264 @ 0x7fb284802800] ref B L1: 85.3% 14.7%
  
  [libx264 @ 0x7fb284802800] kb/s:19.25

  Log output mp4 conversion :

  $ ffmpeg -i slide_%04d.jpg -vf format=rgba -pix_fmt yuv420p -vcodec libx264 -movflags +faststart -preset veryslow output12345.mp4
  
  ffmpeg version 4.1 Copyright (c) 2000-2018 the FFmpeg developers
  
  built with Apple LLVM version 10.0.0 (clang-1000.11.45.5)
  
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.1 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gpl --enable-libmp3lame --enable-libopus --enable-libsnappy --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-opencl --enable-videotoolbox
  
  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, image2, from 'slide_%04d.jpg':
  
  Duration: 00:00:25.36, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1280x720, 25 fps, 25 tbr, 25 tbn, 25 tbc
  
  File 'output12345.mp4' already exists. Overwrite ? [y/N] y
  
  Stream mapping:
  
  Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  [swscaler @ 0x7fb7e280b000] deprecated pixel format used, make sure you did set range correctly
  
  [libx264 @ 0x7fb7e1803c00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
  [libx264 @ 0x7fb7e1803c00] profile High, level 5.0
  
  [libx264 @ 0x7fb7e1803c00] 264 - core 152 r2854 e9a5903 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 ref=16 deblock=1:0:0 analyse=0x3:0x133 me=umh subme=10 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=24 chroma_me=1 trellis=2 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=8 b_pyramid=2 b_adapt=2 b_bias=0 direct=3 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=60 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 'output12345.mp4':
  
  Metadata:
  
      encoder         : Lavf58.20.100
  
      Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1280x720, q=-1--1, 25 fps, 12800 tbn, 25 tbc
  
      Metadata:
  
      encoder         : Lavc58.35.100 libx264
  
      Side data:
  
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
  [mp4 @ 0x7fb7e1801800] Starting second pass: moving the moov atom to the beginning of the file     
  
  frame=  634 fps=8.5 q=-1.0 Lsize=    2252kB time=00:00:25.24 bitrate= 731.0kbits/s speed=0.337x    
  
  video:2245kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.307448%
  
  [libx264 @ 0x7fb7e1803c00] frame I:5     Avg QP:19.12  size: 49393
  
  [libx264 @ 0x7fb7e1803c00] frame P:131   Avg QP:22.18  size:  9379
  
  [libx264 @ 0x7fb7e1803c00] frame B:498   Avg QP:23.78  size:  1652
  
  [libx264 @ 0x7fb7e1803c00] consecutive B-frames:  3.2%  1.6%  3.3% 29.7%  7.9% 16.1%  7.7% 16.4% 14.2%
  
  [libx264 @ 0x7fb7e1803c00] mb I  I16..4: 45.7% 37.9% 16.4%
  
  [libx264 @ 0x7fb7e1803c00] mb P  I16..4:  6.0%  5.3%  1.3%  P16..4: 19.9%  1.9%  3.7%  0.3%  0.1%    skip:61.5%
  
  [libx264 @ 0x7fb7e1803c00] mb B  I16..4:  0.3%  0.4%  0.1%  B16..8: 17.5%  1.0%  0.2%  direct: 0.3%  skip:80.2%  L0:52.3% L1:46.9% BI: 0.8%
  
  [libx264 @ 0x7fb7e1803c00] 8x8 transform intra:43.0% inter:48.9%
  
  [libx264 @ 0x7fb7e1803c00] direct mvs  spatial:99.2% temporal:0.8%
  
  [libx264 @ 0x7fb7e1803c00] coded y,uvDC,uvAC intra: 16.9% 25.8% 16.6% inter: 1.1% 1.9% 1.2%
  
  [libx264 @ 0x7fb7e1803c00] i16 v,h,dc,p: 61% 28%  6%  6%
  
  [libx264 @ 0x7fb7e1803c00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 20%  9% 50%  3%  4%  3%  3%  3%  5%
  
  [libx264 @ 0x7fb7e1803c00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 18% 23% 19%  5%  7%  6%  6%  5% 10%
  
  [libx264 @ 0x7fb7e1803c00] i8c dc,h,v,p: 46% 40% 13%  1%
  
  [libx264 @ 0x7fb7e1803c00] Weighted P-Frames: Y:5.3% UV:5.3%
  
  [libx264 @ 0x7fb7e1803c00] ref P L0: 33.2%  3.1% 11.6%  7.3%  8.8%  6.4%  6.5%  3.1%  3.2%  2.6%  2.4%  2.5%  2.8%  2.8%  2.3%  1.4%
  
  [libx264 @ 0x7fb7e1803c00] ref B L0: 42.0% 15.1% 12.0%  5.4%  4.9%  4.3%  4.0%  1.9%  2.0%  1.8%  1.7%  1.8%  1.7%  1.1%  0.5%
  
  [libx264 @ 0x7fb7e1803c00] ref B L1: 83.5% 16.5%
  
  [libx264 @ 0x7fb7e1803c00] kb/s:725.10

  Player :
  QuickTime, VLC and Kodi on both Linux and Mac.

  EDIT 2 :
  Input files : https://drive.google.com/open?id=1kbBkSDSwe6ywgQ8lkjqkh-MKCzGA4bj8

• How to split a mp4 file into multiple .m4s chunks with one init.mp4 file

  29 novembre 2018, par JAVA Coder

  I am trying to split one audio.mp4 into multiple chunks(each of 10 seconds) with file format of .m4s or .mpd and one init.mp4 .

  1>I have successfully made chunks of 10 secs with one m3u8 file by this command-

  ffmpeg -i song.mp3 -c:a aac -b:a 64k -vn -hls_time 10 -hls_list_size 0 abc.m3u8

  2>Tried this command also

  MP4Box -dash 10000 -frag 1000 -rap -segment-name myDash -subsegs-per-sidx 5 -url-template test.mp4

  But not able to make .m4s chunks with one init.mp4.

• OpenCV's VideoCapture::open Video Source Dialog

  13 novembre 2015, par swtdrgn

  In my current project, when I call VideoCapture::open(camera device index) and the camera is in used by another program, it shows a Video Source dialog and returns true when I select a device that is already in use.

  However, in my [previous] experiment project, when I called VideoCapture::open(camera device index), it doesn’t show this dialog.

  I want to know what is causing the Video Source dialog to show and the program to behave differently from the experimental project.

  This is the source code to the experiment project :

  int main (int argc, char *argv[])
  
  {
  
  
  
      //vars
  
      time_duration td, td1;
  
      ptime nextFrameTimestamp, currentFrameTimestamp, initialLoopTimestamp, finalLoopTimestamp;
  
      int delayFound = 0;
  
      int totalDelay= 0;
  
  
  
      // initialize capture on default source
  
      VideoCapture capture;
  
      std::cout << "capture.open(0): " << capture.open(0) << std::endl;
  
      std::cout << "NOOO" << std::endl;
  
      namedWindow("video", 1);
  
  
  
      // set framerate to record and capture at
  
      int framerate = 15;
  
  
  
      // Get the properties from the camera
  
      double width = capture.get(CV_CAP_PROP_FRAME_WIDTH);
  
      double height = capture.get(CV_CAP_PROP_FRAME_HEIGHT);
  
  
  
      // print camera frame size
  
      //cout << "Camera properties\n";
  
      //cout << "width = " << width << endl <<"height = "<< height << endl;
  
  
  
      // Create a matrix to keep the retrieved frame
  
      Mat frame;
  
  
  
      // Create the video writer
  
      VideoWriter video("capture.avi",0, framerate, cvSize((int)width,(int)height) );
  
  
  
      // initialize initial timestamps
  
      nextFrameTimestamp = microsec_clock::local_time();
  
      currentFrameTimestamp = nextFrameTimestamp;
  
      td = (currentFrameTimestamp - nextFrameTimestamp);
  
  
  
      // start thread to begin capture and populate Mat frame
  
      boost::thread captureThread(captureFunc, &frame, &capture);
  
      // loop infinitely
  
      for(bool q=true;q;)
  
      {
  
          if(frame.empty()){continue;}
  
          //if(cvWaitKey( 5 ) == 'q'){ q=false; }
  
          // wait for X microseconds until 1second/framerate time has passed after previous frame write
  
          while(td.total_microseconds() < 1000000/framerate){
  
              //determine current elapsed time
  
              currentFrameTimestamp = microsec_clock::local_time();
  
              td = (currentFrameTimestamp - nextFrameTimestamp);
  
              if(cvWaitKey( 5 ) == 'q'){
  
                  std::cout << "B" << std::endl;
  
                  q=false;
  
                  boost::posix_time::time_duration timeout = boost::posix_time::milliseconds(0);
  
                  captureThread.timed_join(timeout);
  
                  break;
  
              }
  
          }
  
  
  
          // determine time at start of write
  
          initialLoopTimestamp = microsec_clock::local_time();
  
  
  
          // Save frame to video
  
          video << frame;
  
          imshow("video", frame);
  
  
  
          //write previous and current frame timestamp to console
  
          cout << nextFrameTimestamp << " " << currentFrameTimestamp << " ";
  
  
  
          // add 1second/framerate time for next loop pause
  
          nextFrameTimestamp = nextFrameTimestamp + microsec(1000000/framerate);
  
  
  
          // reset time_duration so while loop engages
  
          td = (currentFrameTimestamp - nextFrameTimestamp);
  
  
  
          //determine and print out delay in ms, should be less than 1000/FPS
  
          //occasionally, if delay is larger than said value, correction will occur
  
          //if delay is consistently larger than said value, then CPU is not powerful
  
          // enough to capture/decompress/record/compress that fast.
  
          finalLoopTimestamp = microsec_clock::local_time();
  
          td1 = (finalLoopTimestamp - initialLoopTimestamp);
  
          delayFound = td1.total_milliseconds();
  
          cout << delayFound << endl;
  
  
  
          //output will be in following format
  
          //[TIMESTAMP OF PREVIOUS FRAME] [TIMESTAMP OF NEW FRAME] [TIME DELAY OF WRITING]
  
          if(!q || cvWaitKey( 5 ) == 'q'){
  
              std::cout << "C" << std::endl;
  
              q=false;
  
              boost::posix_time::time_duration timeout = boost::posix_time::milliseconds(0);
  
              captureThread.timed_join(timeout);
  
              break;
  
          }
  
      }
  
  
  
      // Exit
  
      return 0;
  
  }