NJ
How do the timeshift channels cope with these sorts of interruptions?
Surely if you have a power outage that kills the playout of the main channel and the +1 channel (and said outage also would naturally kill whatever is recording the main channel for the purpose of holding it for the +1 channel), then surely the +1 channel output would suddenly jump when it comes to the point where the power was out? That is, if the power was out for 15mins, timeshift should return as a 1hr 15min timeshift for the next hour and then suddenly crash into the "please wait while we rectify the fault" stuff, surely?
Neil Jones
Founding member
Westy2 posted:
Para + 1 - Blank screen(But I s'pose it's got to catch up seeing it's an hour behind !)
How do the timeshift channels cope with these sorts of interruptions?
Surely if you have a power outage that kills the playout of the main channel and the +1 channel (and said outage also would naturally kill whatever is recording the main channel for the purpose of holding it for the +1 channel), then surely the +1 channel output would suddenly jump when it comes to the point where the power was out? That is, if the power was out for 15mins, timeshift should return as a 1hr 15min timeshift for the next hour and then suddenly crash into the "please wait while we rectify the fault" stuff, surely?
MA
+1 channels are simply the main channel output buffered for one hour on a video server. Anything that happens to the main channel will repeat one hour later on the +1 channel.
In the event of a power cut to the video server the +1 channel will most likely need to be manually restarted.
Power failures in transmission areas are a nightmare, as much of the equipment is never normally powered down. When it is, unexpectedly, it can restart in unexpected modes, and some of it may not come back on at all.
In the event of a power cut to the video server the +1 channel will most likely need to be manually restarted.
Power failures in transmission areas are a nightmare, as much of the equipment is never normally powered down. When it is, unexpectedly, it can restart in unexpected modes, and some of it may not come back on at all.
BB
I would have thought they would have had some sort of UPS backup system that would kick in seamlessly in the event of any interruption or severe mometary voltage drop to the incoming power feed to keep the key equipment online?
Quote:
In the event of a power cut to the video server the +1 channel will most likely need to be manually restarted.
Power failures in transmission areas are a nightmare, as much of the equipment is never normally powered down. When it is, unexpectedly, it can restart in unexpected modes, and some of it may not come back on at all.
Power failures in transmission areas are a nightmare, as much of the equipment is never normally powered down. When it is, unexpectedly, it can restart in unexpected modes, and some of it may not come back on at all.
I would have thought they would have had some sort of UPS backup system that would kick in seamlessly in the event of any interruption or severe mometary voltage drop to the incoming power feed to keep the key equipment online?
:-(
A former member
This explains then why at about 12:30 when I was flicking through the channels, Paramount Comedy 2 was running behind schedule and had pretty poor sound and video quality.
I thought it was the TV at first.
I thought it was the TV at first.
SP
Yeah, but if the Beeb can't maintain an uninterrupted power supply it's perhaps a little over the top to expect a satellite broadcaster, probably run on a shoestring, to do likewise.
BBC TV Centre posted:
I would have thought they would have had some sort of UPS backup system that would kick in seamlessly in the event of any interruption or severe mometary voltage drop to the incoming power feed to keep the key equipment online?
Yeah, but if the Beeb can't maintain an uninterrupted power supply it's perhaps a little over the top to expect a satellite broadcaster, probably run on a shoestring, to do likewise.
HA
Yep I was expecting Man About The House, but George and Mildred was still on.
harshy
Founding member
jason posted:
This explains then why at about 12:30 when I was flicking through the channels, Paramount Comedy 2 was running behind schedule and had pretty poor sound and video quality.
I thought it was the TV at first.
I thought it was the TV at first.
Yep I was expecting Man About The House, but George and Mildred was still on.
MA
I would have thought they would have had some sort of UPS backup system that would kick in seamlessly in the event of any interruption or severe mometary voltage drop to the incoming power feed to keep the key equipment online?
Yes, most do. Though that's not a failsafe either, for example if the UPS bursts into flames...
BBC TV Centre posted:
Quote:
In the event of a power cut to the video server the +1 channel will most likely need to be manually restarted.
Power failures in transmission areas are a nightmare, as much of the equipment is never normally powered down. When it is, unexpectedly, it can restart in unexpected modes, and some of it may not come back on at all.
Power failures in transmission areas are a nightmare, as much of the equipment is never normally powered down. When it is, unexpectedly, it can restart in unexpected modes, and some of it may not come back on at all.
I would have thought they would have had some sort of UPS backup system that would kick in seamlessly in the event of any interruption or severe mometary voltage drop to the incoming power feed to keep the key equipment online?
Yes, most do. Though that's not a failsafe either, for example if the UPS bursts into flames...
NJ
Cheers for that
Nice to know how these things work.
Although I suppose how this works depends on how each channel sets up their equipment? But if the timeshift channel does auto-restart by itself (which it looks as if Para + 1 did last night) then surely the picture would still jump at the point where the original buffer was interrupted and the new one started?
Or would I be right in assuming that the video server(s) are keyed to run the output exactly one hour behind regardless of whether there's actually been input to it (due to no power) and thus it's got nothing to output (hence a blank screen to "catch up" as it were to the start of the new buffer)?
Neil Jones
Founding member
marksi posted:
+1 channels are simply the main channel output buffered for one hour on a video server. Anything that happens to the main channel will repeat one hour later on the +1 channel.
In the event of a power cut to the video server the +1 channel will most likely need to be manually restarted.
In the event of a power cut to the video server the +1 channel will most likely need to be manually restarted.
Cheers for that
Nice to know how these things work.
Although I suppose how this works depends on how each channel sets up their equipment? But if the timeshift channel does auto-restart by itself (which it looks as if Para + 1 did last night) then surely the picture would still jump at the point where the original buffer was interrupted and the new one started?
Or would I be right in assuming that the video server(s) are keyed to run the output exactly one hour behind regardless of whether there's actually been input to it (due to no power) and thus it's got nothing to output (hence a blank screen to "catch up" as it were to the start of the new buffer)?