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Asa3,612 posts since 22 Mar 2001 Administrator
Meridian (South East) South East Today
Nice to see picture-in-picture on the iPad, I don't know if this has always been a thing available on the app. It's something NowTV still doesn't have, years after first being requested on their forums. It must just be a few lines of code to enable at best!
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thegeek5,198 posts since 1 Jan 2002
London London
I think the 2 minute delay is something that needs sorting if live streaming will be the future.


That's how streaming over the internet works.

How short is short enough to be acceptable? The live channels on YouView are a second or two behind real time (roughly on a par with DSat) but aren't really being delivered over the public internet.
I think if other broadcasters wanted to achieve something similar, they'd have to make their streams available as multicast to each ISP - which is then potentially going to come up against net neutrality rules.

Incidentally, I know it's not exactly easy for the average viewer to measure (other than by perhaps comparing against 5 Live commentary), but I think our UHD stream was only about 40 seconds behind; were 2 minute lags really that common?
noggin14,679 posts since 26 Jun 2001
I think the 2 minute delay is something that needs sorting if live streaming will be the future.


That's how streaming over the internet works.

How short is short enough to be acceptable? The live channels on YouView are a second or two behind real time (roughly on a par with DSat) but aren't really being delivered over the public internet.
I think if other broadcasters wanted to achieve something similar, they'd have to make their streams available as multicast to each ISP - which is then potentially going to come up against net neutrality rules.

Incidentally, I know it's not exactly easy for the average viewer to measure (other than by perhaps comparing against 5 Live commentary), but I think our UHD stream was only about 40 seconds behind; were 2 minute lags really that common?


I thought YouView used OTT unicast over public internet for some or all of its streams? I know BT TV uses multicast (and is tied to having BT Broadband who peer it), and you get BT TV on YouView branded boxes, but they aren't 100% the same thing are they?
noggin14,679 posts since 26 Jun 2001
The amazon stream was 21 secs behind.

It varies by device and connection.


Indeed, I was getting anything between 30 seconds and 1 minute 10 seconds delay when comparing the stream on my phone to a live fibre feed of the match. Never as much as 2 minutes though.


Live fibre feed in a broadcast MCR (i.e. direct from site?) If so uncompressed, J2K or LongGOP h.264 out of interest.
Blake Connolly1,808 posts since 21 Apr 2001
London London
It varies by device and connection.


Indeed, I was getting anything between 30 seconds and 1 minute 10 seconds delay when comparing the stream on my phone to a live fibre feed of the match. Never as much as 2 minutes though.


Live fibre feed in a broadcast MCR (i.e. direct from site?) If so uncompressed, J2K or LongGOP h.264 out of interest.


In Playout via an MCR, so no idea about that (all we usually need to know is that we have pictures and whether it's stereo or 5.1! Very Happy) I'm sure there's someone else here who might be able to answer that, though.
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thegeek5,198 posts since 1 Jan 2002
London London

That's how streaming over the internet works.

How short is short enough to be acceptable? The live channels on YouView are a second or two behind real time (roughly on a par with DSat) but aren't really being delivered over the public internet.
I think if other broadcasters wanted to achieve something similar, they'd have to make their streams available as multicast to each ISP - which is then potentially going to come up against net neutrality rules.

Incidentally, I know it's not exactly easy for the average viewer to measure (other than by perhaps comparing against 5 Live commentary), but I think our UHD stream was only about 40 seconds behind; were 2 minute lags really that common?


I thought YouView used OTT unicast over public internet for some or all of its streams? I know BT TV uses multicast (and is tied to having BT Broadband who peer it), and you get BT TV on YouView branded boxes, but they aren't 100% the same thing are they?

You may be right - I've only had experience of a BT TV YouView box on a BT Infinity connection, often side-by-side with a Sky box.



Indeed, I was getting anything between 30 seconds and 1 minute 10 seconds delay when comparing the stream on my phone to a live fibre feed of the match. Never as much as 2 minutes though.


Live fibre feed in a broadcast MCR (i.e. direct from site?) If so uncompressed, J2K or LongGOP h.264 out of interest.


In Playout via an MCR, so no idea about that (all we usually need to know is that we have pictures and whether it's stereo or 5.1! Very Happy) I'm sure there's someone else here who might be able to answer that, though.

I'm going to take a punt that Blake was seeing the pictures at the same time as Amazon's encoders, give or take a few frames.
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