Bandwidth shaping - Is iPlayer treated differently from other streaming media?
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Bandwidth shaping - Is iPlayer treated differently from other streaming media?
09-03-2009 9:36 PM
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All streaming (Shoutcast, Napster, Last.fm) work fine but iPlayer often continuously rebuffers. It was a big problem this evening and early yesterday evening for instance.
It would help me work out what the problem is if PlusNet could categorically state that they bandwidth shape streamed services as a whole and do not treat iPlayer any differently from any other streamed services.
Thanks.
MC
Re: Bandwidth shaping - Is iPlayer treated differently from other streaming media?
09-03-2009 9:48 PM
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Re: Bandwidth shaping - Is iPlayer treated differently from other streaming media?
09-03-2009 10:48 PM
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The terms I have problems with are wireshark, BBYW, 0x80 & Gold.
I have a feeling that even if I did understand these terms It might not necessarily answer the question.
Does it mean that iPlayer radio is treated exactly the same as any other streaming radio, in terms of traffic shaping and bandwidth limiting?
Another salient point is that iPlayer is fine at this moment. If there is a pattern it's that iPlayers rebuffering is mainly at its worst for an hour or two in the early evening.
Cheers.
MC
Re: Bandwidth shaping - Is iPlayer treated differently from other streaming media?
09-03-2009 11:01 PM
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Re: Bandwidth shaping - Is iPlayer treated differently from other streaming media?
09-03-2009 11:11 PM
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MC
Re: Bandwidth shaping - Is iPlayer treated differently from other streaming media?
09-03-2009 11:17 PM
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Re: Bandwidth shaping - Is iPlayer treated differently from other streaming media?
09-03-2009 11:38 PM
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I am clutching at straws but the fact that rebuffering sems to be worst at certain times of day has led me to look at my ISPs bandwidth shaping and general connectivity to the BBC radio content host/partner that the BBC use for the iPlayer Radio 4 stream (which appears to be coming from IP address 212.58.249.123 at the moment, if that means anything.. and is not just some sort of proxy).
I would of course be very interested to hear from any other PlusNet Squeezebox users (www.slimdevices.com)
MC
Re: Bandwidth shaping - Is iPlayer treated differently from other streaming media?
10-03-2009 12:29 AM
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Wireshark reports that traffic from the iPlayer source IP address (212.58.249.123) is prioritised thus: Differentiated Services Field: 0x60
Is this to be expected?
My account is a PlusNet Broadband Your Way Option 4 with included 40GB bandwidth for which I currently pay £29.35 a month.
Any help appreciated.
MC
Re: Bandwidth shaping - Is iPlayer treated differently from other streaming media?
10-03-2009 9:52 AM
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Re: Bandwidth shaping - Is iPlayer treated differently from other streaming media?
10-03-2009 10:30 AM
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This begs the question... what determines whether a stream gets classed as 0x80 or 0x60, and for me... would Radio 4 via iPlayer work on a Logitech Squeezebox at peaks times if the iPlayer stream was classed as 0x80?
At this moment I'm thinking along the lines that the problem is some sort of incompatibility between the PlusNet bandwidth shaping and the Squeezebox (wireless) network hardware or streaming protocol (slimproto).
To _CN_: Try to get PlusNet to buy you a Squeezebox... for diagnostic purposes of course..... better stil get them to buy you a Boom: http://www.slimdevices.com/pi_boom.html
🙂
MC
Re: Bandwidth shaping - Is iPlayer treated differently from other streaming media?
10-03-2009 11:48 AM
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Re: Bandwidth shaping - Is iPlayer treated differently from other streaming media?
10-03-2009 12:42 PM
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However, it does look like that the Squeezebox traffic is being prioritised as 0x60 which is the "gold plated" queue, not the "gold" queue, which is 0x80.
This means that during times that the network is busy, the "gold plated" traffic is squeezed before the "gold" traffic. This could certainly be the cause of your problem - as the network gets busier the lower-queued protocols are forced into using less bandwidth. For most protocols this isn't a problem because they're not time sensitive. However, in this case it's my opinion that the traffic is incorrectly prioritised.
Because the Squeezeplayer effectively encapsulates the iPlayer traffic, the Ellacoyas cannot identify it as such. However, it obviously is identifying it as SOMETHING (as it's giving it a gold-plated rating, not a bronze rating which is the default for unidentified traffic)
I suspect that Carl could confirm or deny this, and hopefully get it's queue changed to Gold, or explain why this isn't feasible.
Cheers
B.
Re: Bandwidth shaping - Is iPlayer treated differently from other streaming media?
10-03-2009 12:46 PM
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Re: Bandwidth shaping - Is iPlayer treated differently from other streaming media?
10-03-2009 1:29 PM
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Re: Bandwidth shaping - Is iPlayer treated differently from other streaming media?
10-03-2009 2:04 PM
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The iPlayer plugin is a bit of software that plugs into the SqueezeCenter streaming server software. This software streams audio to a number of hardware devices built by SlimDevices (now bought by Logitech). SlimDevices/Logitech have also developed a software emulator of their hardware device(s), which can be used for testing (as i have done for this problem).
I used Netstat on the laptop hosting the software emulator playing the stream to get the IP address.
Errr... does this help?
MC
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