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A
Anonymous
March 15, 2010
Question

latencies / delay in live streams

  • March 15, 2010
  • 1 reply
  • 889 views

I'm doing some tests with FMS and live streaming, but I observe quite long delays.

When the stream is first accessed, the latency is around 3-5 seconds, which is acceptable.

But as we watch the stream for about 30 minutes or more, the latency grows to around 20 seconds, which is just too much.

What settings should I look at to keep the latency / delay minimal?

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    1 reply

    Asa_-_FMS
    Adobe Employee
    Asa_-_FMS
    Adobe Employee
    March 16, 2010

    You're going to want to look at the bandwidth that you're pushing into your FMS system and the bandwidth you're getting out.  Usually when you see evolving live latency it's because there's a bandwidth bottleneck somewhere and you're dropping frames and falling behind as FMS attempts to deliver a stream that's too big for the destination.  If not then perhaps it's something else, but you'll want to eliminate that possibility first as it's the most common.

    Asa

    A
    Anonymous
    March 16, 2010

    Bandwidth is not an issue here, as it's all on 1 Gbit network with just a handful of clients connected, with pretty capable/powerful servers.

    A
    Anonymous
    March 17, 2010

    When the latency on the stream starts to develop, do new subscribers experience the same latency as soon as they connect, or does playback start out with little or no latency? It would be helpful to get an idea if the latency is accumulating between the publishing client and the server or between the server and the subscribing client. If the latency seems to exist right away for new subscribing clients, I'd start looking at what's happening between the publishing client and the server.

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