View Full Version : Underruns
10th October 2006, 21:50
I want to ask what is if i see in shoutcast administrator that Address Connect Time Underruns Kick IP Ban IP Ban Subnet Reserve IP
200.12.... 9h 21m 34s 3.What it means underruns 3?Thnx for your answer
10th October 2006, 23:50
Under-running means a listener has not gotten your stream on time and had to re-buffer the stream underruns times.
Two reasons for this, that can occur individually or at the same time -- either your listener did not have the inbound (download) bandwidth to sustain the stream bitrate as long as thay have been connected, and/or you did not have sufficient outbound (upload) bandwidth for the duration of the listener's connect time.
Buffer position is directly related to this as it shows how close a listener is to an underrun -- ideally, it should be zero or close to it, meaning that the DNAS has sent everything it has gotten from the source so far to the listener, and thus it does not have any unsent stream that it is holding. When the buffer position approaches 1 megabyte for a listener, they are close to an underrun which will reset the buffer position to zero. Typically the number will fluctuate up and down, if it is slowly increasing, either you or your listener is bandwidth challenged at this time.
A connected listener who tries to listen while also browsing may find it hard to keep up depending on the sites they visit and what they are doing (downloading penalizes them) -- What you do will also impact your available upload at any instant (uploading penalizes you).
If you exceed your maximum upload bandwidth because your combination of stream bitrate and maxlisteners is too high, all listeners will experience underruns (and re-buffer) before they drop the connection altogether, and/or the number of connected listeners drops such that their combined bandwidth does not exceed your outbound bandwidth.
11th October 2006, 15:27
12th October 2006, 01:51
good write up spinnercee :)
29th April 2007, 00:35
Great response. Bravo.
18th March 2008, 07:10
What's it mean if the listener is up to like 14 on the underrun meter. I have a guy that's listened for 12 hours straight and is up to 14.
Does that mean my station sounds like crap on his end?
18th March 2008, 22:04
No. 14 underruns in 12 hours is nothing (to worry yourself about). It probably maens that in those 12 hours the listener was also doing something else on their computer that caused the underruns -- their player will rebuffer, so to them it will appear as a pause while the player reloads the stream. A rebuffer has nothing to do with sound quality.
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