Q:

Reduce video buffering

I'm playing video on Android using media player via RTSP.   The player takes about 12s to buffer before it starts playing.   Anyone know how I can convince the player to buffer less?   I have full control over the RTSP server and the SDP it returns. 

A:

As per usual, as soon as I decide I should ask a question I work out the answer.   I have a line "b=AS:91" in my SDP.   If I reduce the number the amount of buffering decreases - so b=AS:2 gives about 4 or 5s buffering.