Streaming a live video to DSS for Mobile Phones with VLC

% vlc -vvv v4l2:///dev/video0:input=1:width=128:height=96:adev=hw.1,0:samplerate=32000 --sout '#transcode{venc=ffmpeg{keyint=1},vcodec=mp4v,vb=100k,acodec=mp4a,fps=10,ab=8k,channels=1,samplerate=16000}:rtp{mp4a-latm,dst=127.0.0.1,port-audio=20000,port-video=20002,ttl=127,name=CHANNEL,sdp=file:///usr/local/movies/channel.sdp}'

where:

• v4l2:///dev/video0 is the video device you want you want to stream,
• input=1 is the input channel of the video device (0 - tv tuner, 1 - composite),
• width=128:height=96 is the width and height of the input video signal to fetch by VLC,
• adev=hw.1,0 is the alsa audio device to capture audio from,
• samplerate=32000 is the input sample rate of the audio live feed,
• venc=ffmpeg is the encoder used (in this case it's ffmpeg, but you can use x264),
• {keyint=1} is the advanced ffmpeg encoder switches,
• vcodec=mp4v is video codec used to encode this live video feed (in this case it's MPEG4),
• vb=100k is the video bitrate (100 kbits/s is this case),
• acodec=mp4a is the audio codec used (is this case it's AAC),
• fps=10 is the frame rate of the video feed,
• ab=8k is the audio bitrate (is this case 8 kbits/s),
• mp4a-latm is only used for aac audio, it activates a different payload format for aac,
• dst=127.0.0.1 is the destination IP, where Darwin Streaming Server is hosted,
• ttl=127 is the value of the TTL (Time To Live) of your IP packets (which means that the stream will be able to cross 126 routers),
• sdp=file:///usr/local/movies/channel.sdp is where to create the SDP file for live streaming with Darwin Streaming Server (it should be inside of the DSS movies folder),
• name=CHANNEL is the name of the live video feed.

Tested on Nokia N73 and SE K800.

There is a small problem with some Nokia phones and Darwin Streaming Servers, that need a line to be edited in the created SDP file (for example):

• from b=RR:0 to b=RR:800

After running this command from console, you can access it from your mobile phone or VLC or any player that supports RTSP protocol

• rtsp://192.168.2.3/channel.sdp

where

• 192.168.2.3 is the IP address of the machine where DSS is running.