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• av_interleaved_write_frame() : Connection reset by peer mjpeg : What is wrong with mjpeg stream, ffserver and ffplay ?

  31 décembre 2016, par Ilya Yevlampiev

  I’m creating mjpeg stream from image files using ffmpeg and write it to ffserver’s feed :

  sudo ffmpeg -loop 1 -i fon.jpeg -vcodec mjpeg -f mjpeg http://localhost:8090/feed1.ffm
  
  
  
  ffmpeg version 2.0 Copyright (c) 2000-2013 the FFmpeg developers
  
  built on Aug 19 2013 23:10:58 with gcc 4.7 (Debian 4.7.2-5)
  
  configuration: 
  
  libavutil      52. 38.100 / 52. 38.100
  
  libavcodec     55. 18.102 / 55. 18.102
  
  libavformat    55. 12.100 / 55. 12.100
  
  libavdevice    55.  3.100 / 55.  3.100
  
  libavfilter     3. 79.101 /  3. 79.101
  
  libswscale      2.  3.100 /  2.  3.100
  
  libswresample   0. 17.102 /  0. 17.102
  
  Input #0, image2, from 'fon.jpeg':
  
  Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
  
  Stream #0:0: Video: mjpeg, yuvj420p, 1280x720 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 25 tbn, 25 tbc
  
  Output #0, mjpeg, to 'http://localhost:8090/feed1.ffm':
  
  Metadata:
  
  encoder         : Lavf55.12.100
  
  Stream #0:0: Video: mjpeg, yuvj420p, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 90k tbn, 25 tbc
  
  Stream mapping:
  
  Stream #0:0 -> #0:0 (mjpeg -> mjpeg)
  
  Press [q] to stop, [?] for help

  ffserver is configured as

  Port 8090
  
  RTSPPort 8594
  
  BindAddress 0.0.0.0
  
  MaxClients 100
  
  MaxBandwidth 20000
  
  NoDaemon
  
  <feed>
  
  File /tmp/feed.ffm
  
  FileMaxSize 3M
  
  </feed>
  
  <stream>
  
  Feed feed.ffm
  
  Format rtsp
  
  VideoCodec mjpeg
  
  VideoFrameRate 30
  
  VideoBufferSize 80000
  
  VideoBitRate 200
  
  VideoQMin 1
  
  VideoQMax 5
  
  VideoSize 1280x720
  
  PreRoll 1
  
  Noaudio
  
  </stream>
  
  <stream>
  
  Feed feed.ffm
  
  Format swf
  
  VideoCodec flv
  
  VideoFrameRate 30
  
  VideoBufferSize 50000
  
  VideoBitRate 100
  
  VideoQMin 1
  
  VideoQMax 5
  
  VideoSize 1280x720
  
  PreRoll 0
  
  Noaudio
  
  </stream>

  Then I’m trying to retrieve the rtsp stream from the ffserver :

  ffplay http://localhost:8090/test.rtsp -loglevel debug
  
  avplay version 0.8.5-6:0.8.5-1, Copyright (c) 2003-2012 the Libav developers
  
  built on Jan 13 2013 12:05:48 with gcc 4.7.2
  
  configuration: --arch=amd64 --enable-pthreads --enable-runtime-cpudetect --extra-         version='6:0.8.5-1' --libdir=/usr/lib/x86_64-linux-gnu --prefix=/usr --enable-bzlib --enable-libdc1394 --enable-libdirac --enable-libfreetype --enable-frei0r --enable-gnutls --enable-libgsm --enable-libmp3lame --enable-librtmp --enable-libopencv --enable-libopenjpeg --enable-libpulse --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-vaapi --enable-vdpau --enable-libvorbis --enable-libvpx --enable-zlib --enable-gpl --enable-postproc --enable-swscale --enable-libcdio --enable-x11grab --enable-libx264 --enable-libxvid --shlibdir=/usr/lib/x86_64-linux-gnu --enable-shared --disable-static

  avutil configuration : —arch=amd64 —enable-pthreads —enable-runtime-cpudetect —extra-version=’6:0.8.4-1’ —libdir=/usr/lib/x86_64-linux-gnu —prefix=/usr —enable-bzlib —enable-libdc1394 —enable-libdirac —enable-libfreetype —enable-frei0r —enable-gnutls —enable-libgsm —enable-libmp3lame —enable-librtmp —enable-libopencv —enable-libopenjpeg —enable-libpulse —enable-libschroedinger —enable-libspeex —enable-libtheora —enable-vaapi —enable-vdpau —enable-libvorbis —enable-libvpx —enable-zlib —enable-gpl —enable-postproc —enable-swscale —enable-libcdio —enable-x11grab —enable-libx264 —enable-libxvid —shlibdir=/usr/lib/x86_64-linux-gnu —enable-shared —disable-static
  avcodec configuration : —arch=amd64 —enable-pthreads —enable-runtime-cpudetect —extra-version=’6:0.8.4-1’ —libdir=/usr/lib/x86_64-linux-gnu —prefix=/usr —enable-bzlib —enable-libdc1394 —enable-libdirac —enable-libfreetype —enable-frei0r —enable-gnutls —enable-libgsm —enable-libmp3lame —enable-librtmp —enable-libopencv —enable-libopenjpeg —enable-libpulse —enable-libschroedinger —enable-libspeex —enable-libtheora —enable-vaapi —enable-vdpau —enable-libvorbis —enable-libvpx —enable-zlib —enable-gpl —enable-postproc —enable-swscale —enable-libcdio —enable-x11grab —enable-libx264 —enable-libxvid —shlibdir=/usr/lib/x86_64-linux-gnu —enable-shared —disable-static
  avformat configuration : —arch=amd64 —enable-pthreads —enable-runtime-cpudetect —extra-version=’6:0.8.4-1’ —libdir=/usr/lib/x86_64-linux-gnu —prefix=/usr —enable-bzlib —enable-libdc1394 —enable-libdirac —enable-libfreetype —enable-frei0r —enable-gnutls —enable-libgsm —enable-libmp3lame —enable-librtmp —enable-libopencv —enable-libopenjpeg —enable-libpulse —enable-libschroedinger —enable-libspeex —enable-libtheora —enable-vaapi —enable-vdpau —enable-libvorbis —enable-libvpx —enable-zlib —enable-gpl —enable-postproc —enable-swscale —enable-libcdio —enable-x11grab —enable-libx264 —enable-libxvid —shlibdir=/usr/lib/x86_64-linux-gnu —enable-shared —disable-static
  swscale configuration : —arch=amd64 —enable-pthreads —enable-runtime-cpudetect —extra-version=’6:0.8.4-1’ —libdir=/usr/lib/x86_64-linux-gnu —prefix=/usr —enable-bzlib —enable-libdc1394 —enable-libdirac —enable-libfreetype —enable-frei0r —enable-gnutls —enable-libgsm —enable-libmp3lame —enable-librtmp —enable-libopencv —enable-libopenjpeg —enable-libpulse —enable-libschroedinger —enable-libspeex —enable-libtheora —enable-vaapi —enable-vdpau —enable-libvorbis —enable-libvpx —enable-zlib —enable-gpl —enable-postproc —enable-swscale —enable-libcdio —enable-x11grab —enable-libx264 —enable-libxvid —shlibdir=/usr/lib/x86_64-linux-gnu —enable-shared —disable-static
  postproc configuration : —arch=amd64 —enable-pthreads —enable-runtime-cpudetect —extra-version=’6:0.8.4-1’ —libdir=/usr/lib/x86_64-linux-gnu —prefix=/usr —enable-bzlib —enable-libdc1394 —enable-libdirac —enable-libfreetype —enable-frei0r —enable-gnutls —enable-libgsm —enable-libmp3lame —enable-librtmp —enable-libopencv —enable-libopenjpeg —enable-libpulse —enable-libschroedinger —enable-libspeex —enable-libtheora —enable-vaapi —enable-vdpau —enable-libvorbis —enable-libvpx —enable-zlib —enable-gpl —enable-postproc —enable-swscale —enable-libcdio —enable-x11grab —enable-libx264 —enable-libxvid —shlibdir=/usr/lib/x86_64-linux-gnu —enable-shared —disable-static

   libavutil    51. 22. 1 / 51. 22. 1
  
   libavcodec   53. 35. 0 / 53. 35. 0
  
   libavformat  53. 21. 1 / 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
  
   http://localhost:8090/test.rtsp: Invalid data found when processing input

  So, what is wrong in this streaming example, if I have no problem when I substitute streams to the files ?

  I create a mjpeg file using the same parameters 9i.e. file is an output insteadof stream)

  sudo ffmpeg -loop 1 -i fon.jpeg -vcodec mjpeg -f mjpeg test.mjpg
  
  ffmpeg version 2.0 Copyright (c) 2000-2013 the FFmpeg developers
  
  built on Aug 19 2013 23:10:58 with gcc 4.7 (Debian 4.7.2-5)
  
  configuration: 
  
  libavutil      52. 38.100 / 52. 38.100
  
  libavcodec     55. 18.102 / 55. 18.102
  
  libavformat    55. 12.100 / 55. 12.100
  
  libavdevice    55.  3.100 / 55.  3.100
  
  libavfilter     3. 79.101 /  3. 79.101
  
  libswscale      2.  3.100 /  2.  3.100
  
  libswresample   0. 17.102 /  0. 17.102
  
  Input #0, image2, from 'fon.jpeg':
  
  Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
  
  Stream #0:0: Video: mjpeg, yuvj420p, 1280x720 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 25 tbn, 25 tbc
  
  Output #0, mjpeg, to 'test.mjpg':
  
  Metadata:
  
  encoder         : Lavf55.12.100
  
  Stream #0:0: Video: mjpeg, yuvj420p, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 90k tbn, 25 tbc
  
  Stream mapping:
  
  Stream #0:0 -> #0:0 (mjpeg -> mjpeg)
  
  Press [q] to stop, [?] for help
  
  frame=   36 fps=0.0 q=0.0 size=     888kB time=00:00:01.36 bitrate=5349.2kbits/sframe=   78 fps= 76 q=0.0 size=    1711kB time=00:00:03.04 bitrate=4609.9kbits/sframe=  120 fps= 78 q=0.0 size=    2533kB time=00:00:04.72 bitrate=4396.9kbits/sframe=  161 fps= 79 q=0.0 size=    3336kB time=00:00:06.36 bitrate=4297.5kbits/sframe=  202 fps= 79 q=0.0 size=    4139kB       
  
  time=00:00:08.00 bitrate=4238.8kbits/sframe=  243 fps= 79 q=0.0 size=    4943kB  
  
  time=00:00:09.64 bitrate=4200.1kbits/sframe=  282 fps= 79 q=0.0 size=    5706kB 
  
  time=00:00:11.20 bitrate=4173.9kbits/sframe=  321 fps= 79 q=0.0 size=    6470kB  
  
  time=00:00:12.76 bitrate=4154.0kbits/sframe=  358 fps= 78 q=0.0 size=    7195kB 
  
  time=00:00:14.24 bitrate=4139.2kbits/sframe=  397 fps= 68 q=0.0 size=    7959kB 
  
  time=00:00:15.80 bitrate=4126.6kbits/s    
  
  [1]+  Stopped sudo ffmpeg -loop 1 -i fon.jpeg -vcodec mjpeg -f mjpeg test.mjpg

  And then I playback this mjpeg file with ffplay. The play back is correct, I see no errors or exceptions.

  ffplay test.mjpg
  
  avplay version 0.8.5-6:0.8.5-1, Copyright (c) 2003-2012 the Libav developers
  
  built on Jan 13 2013 12:05:48 with gcc 4.7.2
  
  [mjpeg @ 0x7fc3680008c0] max_analyze_duration reached
  
  [mjpeg @ 0x7fc3680008c0] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, mjpeg, from 'test.mjpg':
  
  Duration: N/A, bitrate: N/A
  
  Stream #0.0: Video: mjpeg, yuvj420p, 1280x720 [PAR 1:1 DAR 16:9], 25 fps, 25 tbr, 1200k tbn, 1200k tbc
  
  [avsink @ 0x7fc360001020] auto-inserting filter 'auto-inserted scaler 0' between the filter 'src' and the filter 'out'
  
  [scale @ 0x7fc360001700] w:1280 h:720 fmt:yuvj420p -> w:1280 h:720 fmt:yuv420p flags:0x4
  
  27.99 A-V:  0.000 s:0.0 aq=    0KB vq=    0KB sq=    0B f=0/0   0/0

  So, what is the configuration issue for ffserver, or may be it is a bug of the ffserver ?

  UPD. I have realized, that i fed file1.ffm instead of file.ffm ; that caused some ffserver problem :

   Mon Sep  9 11:43:20 2013 [ffm @ 0x2110000]Format ffm probed with size=2048 and score=101
  
   Mon Sep  9 11:43:20 2013 Deleting feed file 'feed1.ffm' as stream counts differ (1 != 2)
  
   Mon Sep  9 11:43:20 2013 [AVIOContext @ 0x210d660]Statistics: 4096 bytes read, 0 seeks
  
   Mon Sep  9 11:43:20 2013 [AVIOContext @ 0x210a9a0]Statistics: 0 seeks, 1 writeouts
  
   Mon Sep  9 11:43:20 2013 FFserver started.
  
   Mon Sep  9 11:44:18 2013 File '/feed1.ffm' not found
  
   Mon Sep  9 11:44:18 2013 127.0.0.1 - - [POST] "/feed1.ffm HTTP/1.1" 404 149

  After i set a correct feed, i got another exception on ffmpeg side :

  sudo ffmpeg -loop 1 -i fon.jpeg -vcodec mjpeg -f mjpeg http://localhost:8090/feed.ffm
  
  ffmpeg version 2.0 Copyright (c) 2000-2013 the FFmpeg developers
  
  built on Aug 19 2013 23:10:58 with gcc 4.7 (Debian 4.7.2-5)
  
  configuration: 
  
  libavutil      52. 38.100 / 52. 38.100
  
  libavcodec     55. 18.102 / 55. 18.102
  
  libavformat    55. 12.100 / 55. 12.100
  
  libavdevice    55.  3.100 / 55.  3.100
  
  libavfilter     3. 79.101 /  3. 79.101
  
  libswscale      2.  3.100 /  2.  3.100
  
  libswresample   0. 17.102 /  0. 17.102
  
  Input #0, image2, from 'fon.jpeg':
  
  Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
  
  Stream #0:0: Video: mjpeg, yuvj420p, 1280x720 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 25 tbn, 25 tbc
  
  Output #0, mjpeg, to 'http://localhost:8090/feed.ffm':
  
  Metadata:
  
  encoder         : Lavf55.12.100
  
  Stream #0:0: Video: mjpeg, yuvj420p, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 90k tbn, 25 tbc
  
  Stream mapping:
  
  Stream #0:0 -> #0:0 (mjpeg -> mjpeg)
  
  Press [q] to stop, [?] for help
  
  av_interleaved_write_frame(): Connection reset by peer

  While ffserver shows no error at all :

  sudo ffserver -f  /etc/ffserver3.conf
  
  ffserver version 2.0 Copyright (c) 2000-2013 the FFmpeg developers
  
  built on Aug 19 2013 23:10:58 with gcc 4.7 (Debian 4.7.2-5)
  
  configuration: 
  
  libavutil      52. 38.100 / 52. 38.100
  
  libavcodec     55. 18.102 / 55. 18.102
  
  libavformat    55. 12.100 / 55. 12.100
  
  libavdevice    55.  3.100 / 55.  3.100
  
  libavfilter     3. 79.101 /  3. 79.101
  
  libswscale      2.  3.100 /  2.  3.100
  
  libswresample   0. 17.102 /  0. 17.102
  
  Mon Sep  9 12:08:19 2013 FFserver started.
  
  Mon Sep  9 12:08:40 2013 127.0.0.1 - - [POST] "/feed.ffm HTTP/1.1" 200 4096
  
  Mon Sep  9 12:12:28 2013 127.0.0.1 - - [GET] "/ HTTP/1.1" 200 1847

  So, what is the problem now ?

• OpenCV Reporting TBR instead of FPS when using capture.get(CV_CAP_PROP_FPS)

  22 février 2012, par Malife

  I have several videos that I am trying to process using OpenCV and Qt 4.7.4 on Mac OS 10.6.8 (Snow Leopard). If I create a cv::VideoCapture object and then query for the frame rate related to such video, what I get back is the TBR and not FPS.

  For instance if use ffprobe Video1.mp4 what I get is :

  >> ffprobe Video1.mp4      
  
  ffprobe version 0.7.8, Copyright (c) 2007-2011 the FFmpeg developers
  
  built on Nov 24 2011 14:31:00 with gcc 4.2.1 (Apple Inc. build 5666) (dot 3)
  
  configuration: --prefix=/opt/local --enable-gpl --enable-postproc --enable-swscale --   
  
  enable-avfilter --enable-libmp3lame --enable-libvorbis --enable-libtheora --enable-
  
  libdirac --enable-libschroedinger --enable-libopenjpeg --enable-libxvid --enable-libx264 
  
  --enable-libvpx --enable-libspeex --mandir=/opt/local/share/man --enable-shared --
  
  enable-pthreads --cc=/usr/bin/gcc-4.2 --arch=x86_64 --enable-yasm
  
  libavutil    50. 43. 0 / 50. 43. 0
  
  libavcodec   52.123. 0 / 52.123. 0
  
  libavformat  52.111. 0 / 52.111. 0
  
  libavdevice  52.  5. 0 / 52.  5. 0
  
  libavfilter   1. 80. 0 /  1. 80. 0
  
  libswscale    0. 14. 1 /  0. 14. 1
  
  libpostproc  51.  2. 0 / 51.  2. 0
  
  
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Video1.mp4':
  
  Metadata:
  
  major_brand     : isom
  
  minor_version   : 0
  
  compatible_brands: mp41avc1qt  
  
  creation_time   : 2012-01-09 23:09:43
  
  encoder         : vlc 1.1.3 stream output
  
  encoder-eng     : vlc 1.1.3 stream output
  
  Duration: 00:10:10.22, start: 0.000000, bitrate: 800 kb/s
  
  Stream #0.0(eng): Video: h264 (Baseline), yuvj420p, 704x480 [PAR 10:11 DAR 4:3], 798 
  
  kb/s, 27.71 fps, 1001 tbr, 1001 tbn, 2002 tbc
  
  Metadata:
  
    creation_time   : 2012-01-09 23:09:43

  Which correctly reports FPS = 27.71 and TBR = 1001. Nevertheless if I use the following OpenCV code to query for the FPS :

  QString filename = QFileDialog::getOpenFileName(this,
  
                                          "Open Video",
  
                                          "Video Files (*.mp4, *.mpg)");
  
  
  
  capture.release();
  
  capture.open(filename.toAscii().data());
  
  
  
  if (!capture.isOpened()){
  
      qDebug() <<"Error when opening the video!";
  
      return;
  
  }
  
  
  
  
  
  qDebug() << "Frame Rate:" << capture.get(CV_CAP_PROP_FPS);
  
  qDebug() << "Num of Frames:" << capture.get(CV_CAP_PROP_FRAME_COUNT);
  
  qDebug() << "OpenCV Version" << CV_VERSION;

  The output I get is :

  Frame Rate: 1001 
  
  Num of Frames: 610832 
  
  OpenCV Version 2.3.1 

  Which reports the TBR instead of the FPS. This behavior is consistent when I try to open different videos.

  I checked OpenCV's bug tracker and I also found this stack overflow question to be a similar but not quite the same problem, so I am at a loss to what to do next. Any hint or idea is most welcome since I've tried lots of things and seem to be getting nowhere.

• process video stream from memory buffer

  10 février 2015, par Dan

  I need to parse a video stream (mpeg ts) from proprietary network protocol (which I already know how to do) and then I would like to use OpenCV to process the video stream into frames. I know how to use cv::VideoCapture from a file or from a standard URL, but I would like to setup OpenCV to read from a buffer(s) in memory where I can store the video stream data until it is needed. Is there a way to setup a call back method (or any other interfrace) so that I can still use the cv::VideoCapture object ? Is there a better way to accomplish processing the video with out writing it out to a file and then re-reading it. I would also entertain using FFMPEG directly if that is a better choice. I think I can convert AVFrames to Mat if needed.