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  • ffmpeg ffserver - create a mosaic from two 720p webcam feeds

    28 juillet 2015, par der_felix

    for a project i would like to take the video feeds (NO audio) of two logitech c920 webcams, put them side-by-side and stream them.
    the c920 is able to compress the video feed with h264 itself(if enabled) and delivers 1080p with upto 30fps.
    the stream is then loaded in an android app by a ffmpeg library and rendered to the screen.

    what i already know :
    i know that i can take multiple streams or input files and create a mosaic stream via the filter_complex module.
    http and h264 seem to be good for streaming, but other configurations are also welcom if they are faster/better.

    the question :
    but how can i start the cameras with v4l2, set the camera resoltution and camera internal encoding and use these streams to create the mosaic ?
    the mosaic should be unscaled (=2560x720px).

    and i very often get the error code 256 but didnt find a solution what it means.

    the system : laptop with usb3, ubuntu 15.04x64 ffmpeg 2.7.1 and ffserver 2.5.7

    thanks for your help

    ffserver config :

    HTTPPort 8080                
    
HTTPBindAddress 0.0.0.0      
    
MaxHTTPConnections 2000   
    
MaxClients 1000         
    
MaxBandwidth 50000
    
CustomLog -      
    
#NoDaemon       
    

    
<feed>         
    

    
File /tmp/feed1.ffm
    
Launch ffmpeg -f v4l2 - input_format h264 -i /dev/video0 -i /dev/video1 -size 1280x720 -r 30 -filter_complex "nullsrc=size=2560x720 [base]; [0:v] setpts=PTS-STARTPTS [left]; [1:v] setpts=PTS-STARTPTS [right]; [base][left] overlay=shortest=1 [tmp1]; [tmp1][right] overlay=shortest=1:x=1280"  -c:v libx264 -f mpegts
    

    
</feed>
    

    
<stream>
    

    
Feed feed1.ffm
    
Format mpegts      
    
VideoBitRate 1024   
    
#VideoBufferSize 1024
    
VideoFrameRate 30      
    
#VideoSize hd720      
    
VideoSize 2560x720
    
#VideoIntraOnly         
    
#VideoGopSize 12      
    
VideoCodec libx264      
    
NoAudio            
    
VideoQMin 3         
    
VideoQMax 31
    
NoDefaults
    

    
</stream>
    

    
<stream>        
    
   Format status
    
   #Only allow local people to get the status
    
   ACL allow localhost
    
   ACL allow 192.168.0.0 192.168.255.255
    
</stream>

    output :

    ubuntu@ubuntu:~$ ffserver
    
ffserver version 2.5.7-0ubuntu0.15.04.1 Copyright (c) 2000-2015 the FFmpeg developers
    
  built with gcc 4.9.2 (Ubuntu 4.9.2-10ubuntu13)
    
  configuration: --prefix=/usr --extra-version=0ubuntu0.15.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --shlibdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --enable-shared --disable-stripping --enable-avresample --enable-avisynth --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libshine --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libwavpack --enable-libwebp --enable-libxvid --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzvbi --enable-libzmq --enable-frei0r --enable-libvpx --enable-libx264 --enable-libsoxr --enable-gnutls --enable-openal --enable-libopencv --enable-librtmp --enable-libx265
    
  libavutil      54. 15.100 / 54. 15.100
    
  libavcodec     56. 13.100 / 56. 13.100
    
  libavformat    56. 15.102 / 56. 15.102
    
  libavdevice    56.  3.100 / 56.  3.100
    
  libavfilter     5.  2.103 /  5.  2.103
    
  libavresample   2.  1.  0 /  2.  1.  0
    
  libswscale      3.  1.101 /  3.  1.101
    
  libswresample   1.  1.100 /  1.  1.100
    
  libpostproc    53.  3.100 / 53.  3.100
    
Tue Jul 28 10:13:44 2015 FFserver started.
    
Tue Jul 28 10:13:44 2015 Launch command line: ffmpeg -f v4l2 - input_format h264 -i /dev/video0 -i /dev/video1 -size 1280x720 -r 30 -filter_complex nullsrc=size=2560x720 [base]; [0:v] setpts=PTS-STARTPTS [left]; [1:v] setpts=PTS-STARTPTS [right]; [base][left] overlay=shortest=1 [tmp1]; [tmp1][right] overlay=shortest=1:x=1280 -c:v libx264 -f mpegts http://127.0.0.1:8080/feed1.ffm
    
feed1.ffm: Pid 17388 exited with status 256 after 0 seconds

    Hey guys !

    Here is our plan b for the mosaic stream.

    Alternative config :

    HTTPPort 8080         
    
HTTPBindAddress 0.0.0.0   
    
MaxHTTPConnections 2000   
    
MaxClients 1000         
    
MaxBandwidth 50000      
    
CustomLog -         
    

    
<feed>
    
File /tmp/feedlinks.ffm
    
Launch ffmpeg -f v4l2 -input_format h264 -vcodec h264 -i /dev/video0 -video_size 1280x720 -r 30
    
</feed>
    

    
<feed>
    
File /tmp/feedrechts.ffm
    
Launch ffmpeg -f v4l2 -input_format h264 -vcodec h264 -i /dev/video1 -video_size 1280x720 -r 30 
    
</feed>
    

    
<stream>
    
Feed feedlinks.ffm
    
Format mpegts
    
VideoBitRate 512
    
VideoFrameRate 30
    
VideoSize hd720
    
VideoCodec libx264
    
NoAudio
    
VideoQMin 3
    
VideoQMax 31
    
</stream>
    

    
<stream>
    
Feed feedrechts.ffm
    
Format mpegts
    
VideoBitRate 512
    
VideoFrameRate 30
    
VideoSize hd720
    
VideoCodec libx264
    
NoAudio
    
VideoQMin 3
    
VideoQMax 31
    
</stream>
    

    
<feed>
    
File /tmp/feedmosaic.ffm
    
Launch ffmpeg -i http://localhost:8080/testlinks.mpg -i http://localhost:8080/testrechts.mpg -filter_complex "nullsrc=size=2560x720 [base]; [0:v] setpts=PTS-STARTPTS [left]; [1:v] setpts=PTS-STARTPTS [right]; [base][left] overlay=shortest=1 [tmp1]; [tmp1][right] overlay=shortest=1:x=1280" -c:v libx264 -preset ultrafast -f mpegts
    
</feed>
    

    
<stream>
    
Feed feedmosaic.ffm
    
Format mpegts         # Format of the stream
    
VideoFrameRate 30      # Number of frames per second
    
VideoSize 2560x720
    
VideoCodec libx264      # Choose your codecs.
    
NoAudio            # Suppress audio
    
VideoQMin 3         # Videoquality ranges from 1 - 31 (worst to best)
    
VideoQMax 31
    
NoDefaults
    
</stream>
    

    
<stream>           # Server status URL
    
   Format status
    
   # Only allow local people to get the status
    
   ACL allow localhost
    
   ACL allow 192.168.0.0 192.168.255.255
    
   ACL allow 192.168.178.0 192.168.255.255
    
</stream>

    And this is the new output :

    ubuntu@ubuntu:~$ ffserver
    
ffserver version 2.5.7-0ubuntu0.15.04.1 Copyright (c) 2000-2015 the FFmpeg developers
    
  built with gcc 4.9.2 (Ubuntu 4.9.2-10ubuntu13)
    
  configuration: --prefix=/usr --extra-version=0ubuntu0.15.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --shlibdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --enable-shared --disable-stripping --enable-avresample --enable-avisynth --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libshine --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libwavpack --enable-libwebp --enable-libxvid --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzvbi --enable-libzmq --enable-frei0r --enable-libvpx --enable-libx264 --enable-libsoxr --enable-gnutls --enable-openal --enable-libopencv --enable-librtmp --enable-libx265
    
  libavutil      54. 15.100 / 54. 15.100
    
  libavcodec     56. 13.100 / 56. 13.100
    
  libavformat    56. 15.102 / 56. 15.102
    
  libavdevice    56.  3.100 / 56.  3.100
    
  libavfilter     5.  2.103 /  5.  2.103
    
  libavresample   2.  1.  0 /  2.  1.  0
    
  libswscale      3.  1.101 /  3.  1.101
    
  libswresample   1.  1.100 /  1.  1.100
    
  libpostproc    53.  3.100 / 53.  3.100
    
/etc/ffserver.conf:44: Setting default value for video bit rate tolerance = 128000. Use NoDefaults to disable it.
    
/etc/ffserver.conf:44: Setting default value for video rate control equation = tex^qComp. Use NoDefaults to disable it.
    
/etc/ffserver.conf:44: Setting default value for video max rate = 1024000. Use NoDefaults to disable it.
    
/etc/ffserver.conf:44: Setting default value for video buffer size = 1024000. Use NoDefaults to disable it.
    
/etc/ffserver.conf:61: Setting default value for video bit rate tolerance = 128000. Use NoDefaults to disable it.
    
/etc/ffserver.conf:61: Setting default value for video rate control equation = tex^qComp. Use NoDefaults to disable it.
    
/etc/ffserver.conf:61: Setting default value for video max rate = 1024000. Use NoDefaults to disable it.
    
/etc/ffserver.conf:61: Setting default value for video buffer size = 1024000. Use NoDefaults to disable it.
    
Tue Jul 28 11:13:01 2015 Codec bitrates do not match for stream 0
    
Tue Jul 28 11:13:01 2015 FFserver started.
    
Tue Jul 28 11:13:01 2015 Launch command line: ffmpeg -f v4l2 -input_format h264 -vcodec h264 -i /dev/video0 -video_size 1280x720 -r 30 http://127.0.0.1:8080/feedlinks.ffm
    
Tue Jul 28 11:13:01 2015 Launch command line: ffmpeg -f v4l2 -input_format h264 -vcodec h264 -i /dev/video1 -video_size 1280x720 -r 30 http://127.0.0.1:8080/feedrechts.ffm
    
Tue Jul 28 11:13:01 2015 Launch command line: ffmpeg -i http://localhost:8080/testlinks.mpg -i http://localhost:8080/testrechts.mpg -filter_complex nullsrc=size=2560x720 [base]; [0:v] setpts=PTS-STARTPTS [left]; [1:v] setpts=PTS-STARTPTS [right]; [base][left] overlay=shortest=1 [tmp1]; [tmp1][right] overlay=shortest=1:x=1280 -c:v libx264 -preset ultrafast -f mpegts http://127.0.0.1:8080/feedmosaic.ffm
    
Tue Jul 28 11:13:02 2015 127.0.0.1 - - [GET] "/feedlinks.ffm HTTP/1.1" 200 4175
    
Tue Jul 28 11:13:02 2015 127.0.0.1 - - [GET] "/feedrechts.ffm HTTP/1.1" 200 4175
    
Tue Jul 28 11:13:18 2015 127.0.0.1 - - [POST] "/feedmosaic.ffm HTTP/1.1" 200 4096
    
Tue Jul 28 11:13:18 2015 127.0.0.1 - - [GET] "/testlinks.mpg HTTP/1.1" 200 2130291
    
Tue Jul 28 11:13:18 2015 127.0.0.1 - - [GET] "/testrechts.mpg HTTP/1.1" 200 1244999
    
feedmosaic.ffm: Pid 18775 exited with status 256 after 17 seconds

    Thanks for your help !

  • Convert static file to h264 stream with FFmpeg [on hold]

    28 août 2013, par Vprnl

    I'm building a NodeJS application that converts a static videofile to a streamable video which is being sent to a client (iPad or browser) on the fly (using the fluent-ffmpeg module).

    Everything is set and all I need now is to configure ffmpeg correctly. But I'm having a lot of problems with ffmpeg.

    With my current settings, I hear audio right away, but the picture starts a couple of seconds later. Then, my 30 second test file has been compressed to 3 seconds of high speed imagery.

    How can I configure my ffmpeg so it will stream the mp4 correctly (in one pass through of course). It seems it is streaming raw h264, if that is the case how can I force the mp4 container. I thought I was doing that by using '-f mp4'

    my correct settings are :

       &#39;-crf 22&#39;,&#39;-c:v libx264&#39;,&#39;-f mp4&#39;,&#39;-movflags&#39;,&#39;faststart+frag_keyframe&#39;

    I've also tried :

     &#39;-r 30&#39;,&#39;-crf 30&#39;,&#39;-analyzeduration 0&#39;,&#39;-probesize 1000&#39;,&#39;-rc_lookahead 0&#39;,&#39;-fflags nobuffer&#39;,&#39;-g 75&#39;,&#39;-ss 0&#39;,&#39;-threads 0&#39;,&#39;-vcodec libx264&#39;,&#39;-qcomp 0.6&#39;,&#39;-qmin 10&#39;,&#39;-qmax 51&#39;,&#39;-qdiff 4&#39;,&#39;-b:v 400k&#39;,&#39;-maxrate 400k&#39;,&#39;-bufsize 800k&#39;,&#39;-acodec mp3&#39;,&#39;-ab 192k&#39;,&#39;-ar 44100&#39;,&#39;-tune zerolatency&#39;,&#39;-f mp4&#39;,&#39;-movflags&#39;,&#39;faststart+frag_keyframe&#39;

    As you can see by the amount of options I've tried, I'm getting pretty desperate. I'm basically just running around in the dark.

    I don't think it matters much but these are my request headers :

                        res.writeHead(200, { // NOTE: a partial http response
    
                        &#39;Content-Type&#39;:&#39;video/mp4&#39;,
    
                        &#39;Content-Length&#39;:stat.size,
    
                        &#39;Content-Range&#39;:&#39;bytes &#39;+start+&#39;-&#39;+end+&#39;/&#39;+stat.size,
    
                        &#39;Transfer-Encoding&#39;:&#39;chunked&#39;
    
                    });

  • Streaming video from nodejs to an open player

    27 août 2013, par Matthew Young

    Odd ball question for somebody just getting started with html5 players and streaming video....

    When using YouTube long videos can be scrolled towards then end then played from there. Assuming YouTube first pulls down metadata like total video start/stop points and a bunch of thumbnails for scrolling.

    Is this possible with an open html5 video player (like projekkter) ? Reason asking is that I have video data inside a mongo database that I would like to stream similar to the YouTube player.

    Inside mongo I have a bunch of smaller h264 files each in a document : actual raw h264 usually 1000kb (max 2 seconds), creation timestamp (long), and potentially a converted format (like mp4) for known clients. Idea is to query off a time range and order by creation time then piping the results into readable stream. There is a nice ffmpeg module to take streams and reformat if needed. Thought about piping the stream to the client with binaryjs and appending it into the player.

    But the source directives in the documentation are usually URLs plus I need to lock down the start/stop point for the total video being played plus thumbnails.

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