Monster PVR

I believe some of these have been created, but I'm curious what the
requirements are to record everything from (say) 10 digital channels
24 hours per day. Presumably its a straight(ish)forward conversion of
data rates into storage?

Based on current transmissions, lets assume recording of:-
BBC1
BBC2
BBC3/CBeenies
BBC4/CBBC
ITV1
C4
Five
More4
E4
Film4

Matt

larkim wrote:
I believe some of these have been created, but I'm curious what the
requirements are to record everything from (say) 10 digital channels
24 hours per day. Presumably its a straight(ish)forward conversion of
data rates into storage?

Based on current transmissions, lets assume recording of:-
BBC1
BBC2
BBC3/CBeenies
BBC4/CBBC
ITV1
C4
Five
More4
E4
Film4

Matt

The word for google is 'multirec' and the platform is MythTV. Quite
fancy doing the same myself :-)

--
Adrian C

On 2 Oct, 13:29, larkim wrote:
I believe some of these have been created, but I'm curious what the
requirements are to record everything from (say) 10 digital channels
24 hours per day.

10 channels in a single mux would be trivial. One DVB-T card, and save
the entire transport stream to disk. 25Mbps has been doable on a
consumer PC for more than a decade (e.g. DV capture).

Based on current transmissions, lets assume recording of:-
BBC1
BBC2
BBC3/CBeenies
BBC4/CBBC
ITV1
C4
Five
More4
E4
Film4

That's multiple muxes. Storing 2 or 3 entire muxes is also fairly
easy, but if you want to split out the individual streams in real time
when capturing (i.e. before storing) - someone who has actually tried
that will have to comment!

btw, I'm not sure about the availability of CBeenies - is this a new
BBC worldwide merchandising thing?

Cheers,
David.

On Oct 2, 1:49*pm, 2Bdecided wrote:
On 2 Oct, 13:29, larkim wrote:

I believe some of these have been created, but I'm curious what the
requirements are to record everything from (say) 10 digital channels
24 hours per day.

10 channels in a single mux would be trivial. One DVB-T card, and save
the entire transport stream to disk. 25Mbps has been doable on a
consumer PC for more than a decade (e.g. DV capture).

Based on current transmissions, lets assume recording of:-
BBC1
BBC2
BBC3/CBeenies
BBC4/CBBC
ITV1
C4
Five
More4
E4
Film4

That's multiple muxes. Storing 2 or 3 entire muxes is also fairly
easy, but if you want to split out the individual streams in real time
when capturing (i.e. before storing) - someone who has actually tried
that will have to comment!

btw, I'm not sure about the availability of CBeenies - is this a new
BBC worldwide merchandising thing?

Didn't you know, BBC has started making hats, but they are
deliberately mis-spelling their name as a marketing ploy.

Matt

On Oct 2, 1:46*pm, Adrian C wrote:
larkim wrote:
I believe some of these have been created, but I'm curious what the
requirements are to record everything from (say) 10 digital channels
24 hours per day. *Presumably its a straight(ish)forward conversion of
data rates into storage?

Based on current transmissions, lets assume recording of:-
BBC1
BBC2
BBC3/CBeenies
BBC4/CBBC
ITV1
C4
Five
More4
E4
Film4

Matt

The word for google is 'multirec' and the platform is MythTV. Quite
fancy doing the same myself :-)

--
Adrian C

Or alternatively you could simply have 10 tuner cards. Multirec just
allows you to theoretically record just 6 multiplexes and therefore
record all transmissions.

The key is storage though. Just curious how many TB would be required
(not to mention the amount of power required - *not* a green
technology!)

Matt

On Oct 2, 1:49*pm, 2Bdecided wrote:
On 2 Oct, 13:29, larkim wrote:

I believe some of these have been created, but I'm curious what the
requirements are to record everything from (say) 10 digital channels
24 hours per day.

10 channels in a single mux would be trivial. One DVB-T card, and save
the entire transport stream to disk. 25Mbps has been doable on a
consumer PC for more than a decade (e.g. DV capture).

So is the logic Mbps * 60s * 60m * 24hr / 8 = MB storage

So a 25Mbps mux in its entirety would take 270GB to store
(thereabouts)?

Matt

larkim wrote:
On Oct 2, 1:46 pm, Adrian C wrote:
larkim wrote:
I believe some of these have been created, but I'm curious what the
requirements are to record everything from (say) 10 digital channels
24 hours per day. Presumably its a straight(ish)forward conversion of
data rates into storage?
Based on current transmissions, lets assume recording of:-
BBC1
BBC2
BBC3/CBeenies
BBC4/CBBC
ITV1
C4
Five
More4
E4
Film4
Matt
The word for google is 'multirec' and the platform is MythTV. Quite
fancy doing the same myself :-)

--
Adrian C

Or alternatively you could simply have 10 tuner cards. Multirec just
allows you to theoretically record just 6 multiplexes and therefore
record all transmissions.

The key is storage though. Just curious how many TB would be required
(not to mention the amount of power required - *not* a green
technology!)

OK, it's probably do'able now that we are in TB drive territory. I can't
do the sums now but remember some fuss made years back on stacking
several drives for freeview. Someone did a web page, BBC perhaps?

Anyway, I'd spilt the drives into two banks. Buffer & Viewing banks.

Firstly I'd have enough in the first bank to buffer one day or two
(because almost always it's someone talking the next day in/on the media
about something wonderful on TV).

I'd then schedule some process to demux & transfer recordings that have
been made, or about to be made - to an external hard drive (for watching
- maybe have several of these USB things for different household
occupants), with further automated backup to optical media if programs
not watched on that within a period of time. It would then keep the
buffer drives clear for continous 24/7 capture, and remove the need for
complicated garbage collection.

--
Adrian C

Kind of reminded me of a gizmo for a vcr that was built that could record
the whole of medium wave for a night.

grin.
Brian

--
Brian Gaff -
Note:- In order to reduce spam, any email without 'Brian Gaff'
in the display name may be lost.
Blind user, so no pictures please!
"larkim" wrote in message
...
I believe some of these have been created, but I'm curious what the
requirements are to record everything from (say) 10 digital channels
24 hours per day. Presumably its a straight(ish)forward conversion of
data rates into storage?

Based on current transmissions, lets assume recording of:-
BBC1
BBC2
BBC3/CBeenies
BBC4/CBBC
ITV1
C4
Five
More4
E4
Film4

Matt

In an earlier contribution to this discussion,
larkim wrote:

I believe some of these have been created, but I'm curious what the
requirements are to record everything from (say) 10 digital channels
24 hours per day. Presumably its a straight(ish)forward conversion of
data rates into storage?

Based on current transmissions, lets assume recording of:-
BBC1
BBC2
BBC3/CBeenies
BBC4/CBBC
ITV1
C4
Five
More4
E4
Film4

Matt


What's the point - unless you've got a machine to *watch* it all for you?!
--
Cheers,
Roger
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Roger Mills wrote:

Based on current transmissions, lets assume recording of:-
BBC1
BBC2
BBC3/CBeenies
BBC4/CBBC
ITV1
C4
Five
More4
E4
Film4

Matt


What's the point - unless you've got a machine to *watch* it all for you?!

Ah, the failings of the electric monk ;-)

"This Monk had first gone wrong when it was simply given too much to
believe in one day. It was, by mistake, cross-connected to a video
recorder that was watching eleven TV channels simultaneously, and this
caused it to blow a bank of illogic circuits. The video recorder only
had to watch them, of course. It didn't have to believe them as well.
This is why instruction manuals are so important."

--
Adrian C