[Red5] Delayed NetStream.Pause.Notify events on slow connections

[Walter Tak]

> Thank you for advice very much, but there are some moments...
>> If your download is like 5 Kbytes/sec , a buffertime of 2 seconds and a
>> stream of 30 kbytes/sec then the client tries to download 2 x 30 kbytes = 
>> 60
>> Kbytes total which can
>> take 60 / 5 = 12 seconds.
>> If you pause the stream it might be possible that the notify comes 'after 
>> 60
>> kbytes of data' and guess what that takes 60 / 5 = 12 seconds at least.
>
> but when I pause the stream in SWF, the buffer flushes and the stream
> stops getting any data because it is paused. And 12 deconds is not
> such a big problem, but the delay is much more, it can be about 40
> seconds...
>
>> Solution:
>
>> 1. do not stream too much to clients that cannot handle those streams 
>> (e.g.
>> make lower-bandwidth streams available if the stream isn't live)
>> 2. lower the clientside buffertime
> I have discovered the the delay doesn't depend on bufferTime, it happens
> even if I set bufferTime = 0 or 0.1
>
>> 3. don't wait for a pause.notify but react on the button which enables 
>> the
>> client to pause a stream
> You are right, the stream pauses instantly, but the problem is we
> can't unpause the stream until we get the notify about pause :((
> so when the user clicks resume he has to wait...

I'd install a few versions of Red5 and see if you can reproduce this 
behaviour on all of them.

Some bugs have been fixed, or re-introduced between 0.6.2 , 0.6.3 and the 
current (Trunk) version.

Just install them next to eachother in different directories, don't install 
as a service on Windows (or init.d on *Nix) but start them
manually so you can switch between the versions 'on the fly'. Don't forget 
to copy your application to all webapps or dist dirs.

I'd also install a bandwidth-monitor or traffic-shaper on the client so you 
can watch in realtime the amount of bytes/sec coming to your system.
I use "Netlimiter" (http://www.netlimiter.com/ for Windows) , on *Nix 
various networking tools are available. Without knowing how much your
client is download you can't say if a delay is a client-side of server-side 
problem.

Walter


Walter


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