Notices

Originally Posted by AndiThebest

Hi.

I want make a argumented reality car, controled by n900 accelerometer.
So i have a embedded debian board with makes a wlan-accesspoint, controls the car and sends a webcam stream to n900.

I have testet videostream from my laptop webcam to n900 (server and client = vlc) with 3 different ways:

Code:

server rtp:
vlc -vvv v4l2:///dev/video0 --sout '#transcode{vcodec=mp2v,acodec=mpga}:rtp{dst=CLIENTADRESSE,port=5000,sdp=file:///home/andi/sdp.sdp,ttl=10,mux=ts,proto=udp}'

client rtp:
open sdp.sdp file, generated by server
vlc file:///sdp.sdp

Code:

server udp multicast:
vlc -vvv v4l2:///dev/video0 --sout '#transcode{vcodec=mp2v,vb=800,scale=1,acodec=mpga,ab=128,channels=2,samplerate=44100}:std{access=udp,mux=ts,dst=239.255.23.23:1234}'

client:
vlc udp://@239.255.23.23:1234 :udp-caching=0

Code:

server mms stream:
vlc -vvv v4l2:///dev/video0 --sout '#transcode{vcodec=mp2v,vb=64,scale=1,acodec=mpga,ab=8,channels=1}:std{access=mmsh,mux=asfh,dst=:8080}'

client (n900, kmplayer, gstreamer/mplayer):
mms://SERVER:8080
via vlc:
vlc mmsh://SERVER:8080

My problem is, delay between webcam and n900(kmplayer/vlc) is ~2 seconds, thats too long.
Any ideas to decrase this latency?

Regards, Andi

Originally Posted by aligatro

try to send uncompressed video, that should help, but wifi might be too slow for it.

u can use my tune-up utilities! it optimize network stack and install iptables and iproute. Other than that reduce color of webcam or compute all data onboard ( do u need a life image anyway ? ).

BTW: do u have fleury or hierholzer algo in php? i really need it!