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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 ?

  • Does H.264 standard allow separate luma and chroma QP control in Baseline Profile ?

    28 août 2013, par Bhaskar Dey

    Although the wikipedia article states that separate luma and chroma QP (quantization parameter) is only supported in High profiles, I didn't find any supporting reference. At least, Rec. ITU-T H.264 (04/2013) section A.2.1 does not mention any such limitation for the Baseline Profile.

    Any comment in this regard would be of great help.

  • Does the H.264 standard allow separate luma and chroma qp control in Baseline Profile ?

    28 août 2013, par Bhaskar Dey

    Although the wikipedia article states that separate luma and chroma QP is only supported in High profiles, I didn't find any supporting reference. At least, Rec. ITU-T H.264 (04/2013) section A.2.1 does not mention any such limitation for the Baseline Profile.

    Any comment in this regard would be of great help.

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