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• Why when creating video file with ffmpeg when playing the video file the video is moving very fast ?

  22 août 2013, par user2704319

  This is how I am using the ffmpeg arguments :

  public void Start(string pathFileName, int BitmapRate)
  
          {
  
              try
  
              {
  
                  string outPath = pathFileName;
  
                  Logger.Write("Output Video File Directory: " + outPath);
  
                  Logger.Write("Frame Rate: " + BitmapRate.ToString());
  
                  p = new NamedPipeServerStream(pipename, PipeDirection.Out, 1, PipeTransmissionMode.Byte);
  
                  b = new byte[1920 * 1080 * 3]; // some buffer for the r g and b of pixels of an image of size 720p
  
  
  
                  ProcessStartInfo psi = new ProcessStartInfo();
  
                  psi.WindowStyle = ProcessWindowStyle.Hidden;
  
                  psi.UseShellExecute = false;
  
                  psi.CreateNoWindow = true;
  
                  psi.FileName = ffmpegFileName; // the ffmpegFileName is the ffmpeg.exe !
  
                  Logger.Write("psi.FileName: " + psi.FileName);
  
                  psi.WorkingDirectory = workingDirectory;
  
                  Logger.Write("psi.WorkingDirectory: " + psi.WorkingDirectory);
  
                  psi.Arguments = @"-f rawvideo -pix_fmt bgr0 -video_size 1920x1080 -i \\.\pipe\mytestpipe -map 0 -c:v libx264 -r " + BitmapRate + " " + outPath;
  
                  Logger.Write("ProcessStartInfo Arguments" + @"-f rawvideo -pix_fmt bgr0 -video_size 1920x1080 -i \\.\pipe\mytestpipe -map 0 -c:v libx264 -r " + BitmapRate + " " + outPath);
  
                  //psi.RedirectStandardOutput = true;
  
                  process = Process.Start(psi);
  
                  process.EnableRaisingEvents = false;
  
                  p.WaitForConnection();
  
              }
  
              catch (Exception err)
  
              {
  
                  Logger.Write("Exception Error: " + err.ToString());
  
              }
  
          }

  I guess it is something with the arguments command, but I am not sure where the problem is.
  I tried to google and saw that you can use h264 or libx264 only with an mp4 output file ?

  How can I fix this ?

  When I am running the video file on any player I see everything moving very fast.

  This is a screenshot of the ffmpeg cmd window :

  

  And this is a link for the video file it created 1.37MB size and only 3 seconds length playing it with Media Player Classic :

  https://skydrive.live.com/redir?resid=EB1C71C44C3976D5 !295&authkey= !AJjCZ-zINYp7h4A

  https://skydrive.live.com/redir?resid=EB1C71C44C3976D5!295&authkey=!AJjCZ-zINYp7h4A

  The ffmpeg command from the cmd window :

  ffmpeg version N-53885-gf97e28e Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Jun  7 2013 00:32:38 with gcc 4.7.3 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
  le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
  
  e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
  
  ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
  
  ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
  
  eex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-
  
  amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --
  
  enable-libxvid --enable-zlib
  
    libavutil      52. 35.100 / 52. 35.100
  
    libavcodec     55. 15.100 / 55. 15.100
  
    libavformat    55.  8.102 / 55.  8.102
  
    libavdevice    55.  2.100 / 55.  2.100
  
    libavfilter     3. 75.101 /  3. 75.101
  
    libswscale      2.  3.100 /  2.  3.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  3.100 / 52.  3.100

  And this is when its working :

  ffmpeg version N-53885-gf97e28e Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Jun  7 2013 00:32:38 with gcc 4.7.3 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
  le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
  
  e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
  
  ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
  
  ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
  
  eex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-
  
  amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --
  
  enable-libxvid --enable-zlib
  
    libavutil      52. 35.100 / 52. 35.100
  
    libavcodec     55. 15.100 / 55. 15.100
  
    libavformat    55.  8.102 / 55.  8.102
  
    libavdevice    55.  2.100 / 55.  2.100
  
    libavfilter     3. 75.101 /  3. 75.101
  
    libswscale      2.  3.100 /  2.  3.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Input #0, rawvideo, from '\\.\pipe\mytestpipe':
  
    Duration: N/A, start: 0.000000, bitrate: 1658880 kb/s
  
      Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1920x1080, 1658880 k
  
  b/s, 25 tbr, 25 tbn, 25 tbc
  
  No pixel format specified, yuv444p for H.264 encoding chosen.
  
  Use -pix_fmt yuv420p for compatibility with outdated media players.
  
  [libx264 @ 003bc420] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
  
  [libx264 @ 003bc420] profile High 4:4:4 Predictive, level 4.0, 4:4:4 8-bit
  
  Output #0, avi, to 'D:\okwow.avi':
  
    Metadata:
  
      ISFT            : Lavf55.8.102
  
      Stream #0:0: Video: h264 (libx264) (H264 / 0x34363248), yuv444p, 1920x1080,
  
  q=-1--1, 25 tbn, 25 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (rawvideo -> libx264)
  
  Press [q] to stop, [?] for help
  
  frame=   10 fps=1.9 q=0.0 size=       6kB time=00:00:00.00 bitrate=N/A

• OUTPUT webcam video over rtp

  20 août 2013, par Manjinder Singh Sekhon

  I'm currently trying to stream webcam video from beagleboard black to my laptop and am using this line of code :

  avconv -f video4linux2 -i /dev/video0 -debug -vcodec mpeg2video -r 25 -pix_fmt yuv420p -me_method epzs -b 2600k -bt 256k -f rtp rtp ://192.168.1.12:5004

  the program starts working, but after a while it doesn't really do anything.
  debug log :

  avconv version v0.8.4, Copyright (c) 2000-2012 the Libav developers
  
    built on May 20 2013 13:00:42 with gcc 4.7.3 20130205 (prerelease)
  
    configuration: --enable-shared --enable-pthreads --enable-gpl --enable-postproc --enable-avfilter --cross-prefix=arm-angstrom-linux-gnueabi- --prefix=/usr --enable-avserver --enable-avplay --enable-x11grab --enable-libtheora --enable-libvorbis --enable-libx264 --arch=arm --target-os=linux --enable-cross-compile --extra-cflags=' -fexpensive-optimizations -fomit-frame-pointer -O4 -ffast-math -march=armv7-a -mthumb-interwork -mfloat-abi=softfp -mfpu=neon -mtune=cortex-a8 --sysroot=/build/v2012.12/build/tmp-angstrom_v2012_12-eglibc/sysroots/beaglebone' --extra-ldflags='-Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed' --sysroot=/build/v2012.12/build/tmp-angstrom_v2012_12-eglibc/sysroots/beaglebone --enable-hardcoded-tables --cpu=cortex-a8
  
    libavutil    51. 22. 1 / 51. 22. 1
  
    libavcodec   53. 35. 0 / 53. 35. 0
  
    libavformat  53. 21. 0 / 53. 21. 0
  
    libavdevice  53.  2. 0 / 53.  2. 0
  
    libavfilter   2. 15. 0 /  2. 15. 0
  
    libswscale    2.  1. 0 /  2.  1. 0
  
    libpostproc  52.  0. 0 / 52.  0. 0
  
  [video4linux2 @ 0x2dae0] [3]Capabilities: 84000001
  
  [video4linux2 @ 0x2dae0] Querying the device for the current frame size
  
  [video4linux2 @ 0x2dae0] Setting frame size to 640x480
  
  [video4linux2 @ 0x2dae0] The V4L2 driver changed the pixel format from 0x32315559 to 0x56595559
  
      Last message repeated 1 times
  
  [video4linux2 @ 0x2dae0] The V4L2 driver changed the pixel format from 0x50323234 to 0x56595559
  
  [video4linux2 @ 0x2dae0] The V4L2 driver set input_id: 0, input: Camera 1

  from what I can see, the program stops because it can't get any input from webcam. The webcam works when I use a opencv program.(so /dev/video0 definitly works.) Any ideas. I've also tried using ffmpeg, but i get message that I should use avconv.

• Invalid and inefficient vfw-avi packed B frames detected

  16 août 2015, par seyong

  I got message Invalid and inefficient vfw-avi packed B frames detected while video was converted.

  After converting the video, I checked pixel values in video. Values are different from original video. Why values change after converting ?

  and I use lossless intra-frame video codec ’ffv1’

  command :
  ffmpeg
  -i input_video -vcodec ffv1 -acodec pcm_s16le output_video

  ffmpeg version 1.1.1 Copyright (c) 2000-2013 the FFmpeg developers  
  
  built on Jan 20 2013 23:05:28 with gcc 4.7.2 (GCC)   configuration:
  
  --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib   libavutil      52. 13.100 / 52. 13.100   libavcodec     54. 86.100 / 54. 86.100   libavformat    54. 59.106 / 54. 59.106   libavdevice    54.  3.102 / 54.  3.102   libavfilter     3. 32.100 /  3. 32.100   libswscale      2.  1.103 / 
  
  2.  1.103   libswresample   0. 17.102 /  0. 17.102   libpostproc    52.  2.100 / 52.  2.100 [mpeg4 @ 02e218c0] Invalid and inefficient vfw-avi packed B frames detected Input #0, avi, from
  
  'D:\video_output\avi\1.avi':   Metadata:
  
      encoder         : Lavf54.59.106   Duration: 00:04:25.52, start: 0.000000, bitrate: 2744 kb/s
  
      Stream #0:0: Video: mpeg4 (Advanced Simple Profile) (DX50 / 0x30355844), yuv420p, 720x544 [SAR 1:1 DAR 45:34], 25 tbr, 25 tbn, 25
  
  tbc
  
      Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, stereo, fltp, 192 kb/s Output #0, matroska, to 'D:\video_output\avi\1_2.mkv': 
  
  Metadata:
  
      encoder         : Lavf54.59.106
  
      Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), yuv420p, 720x544 [SAR 1:1 DAR 45:34], q=2-31, 200 kb/s, 1k tbn, 25 tbc
  
      Stream #0:1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s Stream mapping:   Stream #0:0 -> #0:0 (mpeg4 -> ffv1)   Stream #0:1 ->
  
  #0:1 (ac3 -> pcm_s16le) Press [q] to stop, [?] for help [mpeg4 @ 02e27920] Invalid and inefficient vfw-avi packed B frames detected
  
  frame=   36 fps=0.0 q=0.0 size=    1916kB time=00:00:01.56
  
  bitrate=10008.5kbits/s
  
  ...
  
  frame= 6565 fps= 46 q=0.0 size=  862611kB time=00:04:22.72
  
  bitrate=26897.5kbits/s     frame= 6594 fps= 46 q=0.0 size=  864799kB
  
  time=00:04:23.87 bitrate=26848.0kbits/s     frame CRC mismatch frame=
  
  6629 fps= 46 q=0.0 size=  866407kB time=00:04:25.20
  
  bitrate=26763.2kbits/s     frame= 6638 fps= 46 q=0.0 Lsize=  866521kB
  
  time=00:04:25.56 bitrate=26730.5kbits/s    
  
  
  
  video:816725kB audio:49668kB subtitle:0 global headers:0kB muxing
  
  overhead 0.014713%

  c++ code

  void ProcessVideo::processFrame1(string fileName1, string fileName2) {
  
  this->capture.open(fileName1);
  
  if (!this->capture.isOpened())
  
      cout<<"video1 error";
  
  
  
  get_videoInfo();
  
  
  
  set_videoInfo();
  
  
  
  this->capture1.open(fileName2);
  
  if (!this->capture1.isOpened())
  
      cout<<"video2 error";
  
  
  
  cv::Mat frame; // current video frame
  
  cv::Mat frame1; // current video frame
  
  
  
  cv::namedWindow("image1");
  
  cv::namedWindow("image2");
  
  
  
  int count = 0;
  
  int count1 = 0;
  
  
  
  while (1) {
  
      capture >> frame;
  
      capture1 >> frame1;
  
  
  
      if (frame.empty()) {
  
          //break;
  
          cout<<"Frame1 Empty"<::iterator it=frame.begin();
  
      cv::Mat_::iterator itend=frame.end();
  
  
  
      if (frame1.empty()) {
  
          //break;
  
          cout<<"Frame2 Empty"<::iterator it1=frame1.begin();
  
      cv::Mat_::iterator itend1=frame1.end();
  
  
  
      if(frame.empty() && frame1.empty()) {
  
          break;
  
      }
  
  
  
      count1++;
  
  
  
      int i=0,j=0,k=0;
  
  
  
      while(it!=itend && it1!=itend1) {
  
          ++it;
  
          ++it1;
  
  
  
          count++;
  
  
  
          if((*it)[0] != (*it1)[0]){
  
              i++;
  
          }
  
          else if((*it)[1] != (*it1)[1]){
  
              j++;
  
          }
  
          else if((*it)[2] != (*it1)[2]){
  
              k++;
  
          }
  
      }
  
      cout<<"count diffrent pixel : "<capture.release();
  
  this->capture1.release();

  }