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  • What is wrong with mjpeg stream, ffserver and ffplay ?

    9 septembre 2013, 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=&#39;6:0.8.5-1&#39; --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 &#39;fon.jpeg&#39;:
    
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 &#39;test.mjpg&#39;:
    
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 &#39;test.mjpg&#39;:
    
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 &#39;auto-inserted scaler 0&#39; between the filter &#39;src&#39; and the filter &#39;out&#39;
    
[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 ?

  • 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 &#39;Video1.mp4&#39;:
    
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() &lt;&lt;"Error when opening the video!";
    
    return;
    
}
    

    

    
qDebug() &lt;&lt; "Frame Rate:" &lt;&lt; capture.get(CV_CAP_PROP_FPS);
    
qDebug() &lt;&lt; "Num of Frames:" &lt;&lt; capture.get(CV_CAP_PROP_FRAME_COUNT);
    
qDebug() &lt;&lt; "OpenCV Version" &lt;&lt; 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.

  • FFmpeg AVI recording for H264 @ 1fps not working

    27 février 2012, par Alam

    I am recording H.264 (640x480 @1fps 10seconds) in avi container using FFMPEG. When I play the recorded file in VLC, it plays only first frame and rest of the frames are not played. I am getting

    main warning : late picture skipped (555293 > -305)

    Output of ffprobe is :

    FFprobe version 0.6.2-4:0.6.2-1ubuntu1.1~ppa1~lucid1, Copyright (c) 2007-2010 the Libav developers
    
  built on Jan  3 2012 18:16:35 with gcc 4.4.3
    
  configuration: --extra-version=&#39;4:0.6.2-1ubuntu1.1~ppa1~lucid1&#39; --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
    
  libavutil     50.15. 1 / 50.15. 1
    
  libavcodec    52.72. 2 / 52.72. 2
    
  libavformat   52.64. 2 / 52.64. 2
    
  libavdevice   52. 2. 0 / 52. 2. 0
    
  libavfilter    1.19. 0 /  1.19. 0
    
  libswscale     0.11. 0 /  0.11. 0
    
  libpostproc   51. 2. 0 / 51. 2. 0
    
[h264 @ 0x9feb230]insane cropping not completely supported, this could look slightly wrong ...
    
[avi @ 0x9fea010]max_analyze_duration reached
    
Input #0, avi, from &#39;h2641fps.avi&#39;:
    
  Metadata:
    
    ISFT            : Lavf52.7.0
    
  Duration: 00:00:11.00, start: 0.000000, bitrate: 95 kb/s
    
    Stream #0.0: Video: h264, yuv420p, 640x480 [PAR 1:1 DAR 4:3], 1 fps, 1 tbr, 1 tbn, 60 tbc
    
[h264 @ 0x9feb230]insane cropping not completely supported, this could look slightly wrong ...
    
[STREAM]
    
index=0
    
codec_name=h264
    
codec_long_name=H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
    
codec_type=video
    
codec_time_base=1/60
    
codec_tag_string=H264
    
codec_tag=0x34363248
    
width=640
    
height=480
    
has_b_frames=0
    
sample_aspect_ratio=1:1
    
display_aspect_ratio=4:3
    
pix_fmt=yuv420p
    
r_frame_rate=1/1
    
avg_frame_rate=1/1
    
time_base=1/1
    
start_time=0:00:00.000000
    
duration=0:00:11.000000
    
nb_frames=11
    
[/STREAM]

    Is there something I am doing wrong ? Same code works perfectly for frame rate above 3

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