= Video Streaming Howto = by asbesto & geenna, Poetry Hacklab, 15/06/2010 <> == Using ffmpeg & ffserver == We want to use a web camera to stream video to web page using ffserver. ffserver is part of the ffmpeg package. {{{ apt-get -y install ffmpeg }}} ffserver creates a network socket that is available from client machines to view the video. Once started, you attach an ffmpeg process to the server to do the encoding. Configuration of ffserver is done via the /etc/ffserver.conf file. We installed ffserver on a machine at ip address 10.10.10.160. Typical ffserver.conf file: {{{ Port 8090 # bind to all IPs aliased or not BindAddress 0.0.0.0 # max number of simultaneous clients MaxClients 1000 # max bandwidth per-client (kb/s) MaxBandwidth 10000 # Suppress that if you want to launch ffserver as a daemon. NoDaemon File /tmp/feed1.ffm FileMaxSize 800M Format status Feed feed1.ffm Format swf VideoCodec flv # Audio bit rate at 16 instead of 44 reduces bandwidth a lot! ;) AudioBitRate 16 # idem for sample rate AudioSampleRate 22050 # Bitrate for the video stream: QUADRATAZZI VideoBitRate 90 # Ratecontrol buffer size, non esagerare, meno e' meglio (?!?) VideoBufferSize 1000 # Number of frames per second: SCATTICAZZI VideoFrameRate 3 #VideoQMin 1 #VideoQMax 5 VideoSize 352x288 PreRoll 15 #Noaudio this if you want video only }}} Using the above settings, quality is sufficient, framerate is 3 per second, sufficient for basic usage, and the used bandwidth is around 10Kb/s !!! :) So, just launch the server: {{{ ffserver & }}} Attach the ffmpeg process to do the encoding. This is done via a loopback socket. {{{ # # this is without audio # ffmpeg -r 3 -s 352x288 -f video4linux2 -i /dev/video0 http://10.10.10.160:8090/feed1.ffm # #This is WITH EMBEDDED AUDIO!!! # ffmpeg -f oss -i /dev/dsp -r 3 -s 352x288 -f video4linux2 -i /dev/video0 http://10.10.10.160:8090/feed1.ffm }}} Parameters are * -r rate in frames per second * -s size in pixels width x height (width must be a multiple of 16) and should match the values in the above config file. * -f gets input from the video4linux driver * -i is the v4l device (if this is not present refer to Logitech QuickCam Express) * Lastly the loopback socket I don't understand: * how the -r parameter of ffmpeg interact with server, and * why audio and video goes out of sync. (this problem is also described in ffserver docs) Now you should be able to browse to the server address (or localhost if it's the same machine) and see some live video and the status page. * http://10.10.10.160:8090/test.swf * http://10.10.10.160:8090/status.html The name of the file (test.swf) was defined in the section above. A way to stream from a 1394 camera is this (thanks to Geenna): {{{ dvgrab -format dv1 - | ffmpeg -f dv -i - http://10.10.10.160:8090/feed1.ffm }}} A simple source for a basic webpage with embedded video is here: {{{

}}} == Video Streaming using FreeJ == Please read FreejStreaming for this. Only OGG/Theora!