On Wed, 16 Nov 2016 15:53:55 +0000, Mr. Marmite wrote:
> On Tue, 15 Nov 2016 15:53:23 GMT, Johnny B Good
> <
johnny...@invalid.ntlworld.com> wrote:
>
>> <snip>
>
>> To answer your question, yes, there are dual and quad tuner DVB-T2
>>adapters (PCI and PCIe types) available if you search hard enough but
>>they're not exactly cheap[1]. I'll be needing two such tuners because
>>the BBC4 HD stream is on a seperate mux to the rest of the Beeb's HD
>>broadcast streams on Freeview (I only need a single tuner to capture all
>>of the BBC's SD streams using Kaffeine).
>>
> Thanks for the info.
You're most welcome. :-)
If I'd realised Kaffeine's abilities straight away, I'd have setup a
dedicated Linux box as a PVR a good three years ago. I just assumed it
would suffer the same one tuner per desired TV channel to be recorded
limitation with the various windows flavoured PVR/simple TV recording
software I'd trialled over the past decade.
I only discovered its excellent qualities quite by accident after
recording a couple of programmes from two different BBC TV channels
whilst Kaffeine had been running on "One Lung" due to an oversight in my
configuring that Kworld dual tuner DVB-T adapter. I already knew that
overlapped paddings didn't matter between back to back recordings on any
given TV channel (I just hadn't realised that this applied right across a
whole mux's worth of TV channel streams).
I was never impressed by any of the "Home Theatre" styled PVR software
(too damn cumbersome and a horrible Ten Foot Interface to make matters
even worse). In the end, I stuck with the recording software that had
been supplied with my single tuner DVB-T PCI adapter simply because it
proved to be the most reliable out of a bunch of similar offerings I'd
acquired with other adapters which had even worse issues (such as
selecting from the off-air epg resulting in a totally random programme
being selected).
The DVB Plus software package was chosen simply on account it was the
easiest one to manually set up a recording schedule with when you were
forced to enter the channel/start and run time manually from a web page
(Andrew Flegg's very fine Bleb.org website and the Beeb's own TV schedule
pages).
As far as BBC SD programme broadcasts are concerned, I only need a
single DVB-T tuner to capture whatever takes my fancy without any regard
to padding overlaps (globally set to 5 min start and 10 min end).
Scheduling recordings is simply a matter of looking through each
channel's EPG and selecting whatever programmes I wish to record over the
next 7 days or so. Such a far cry from the days of using DTVR out of the
DVB Plus suite of rubbish editing/processing utilities!!!
>
>> Eight DVB-T2 tuners suggests you're determined to archive the whole of
>>Freeview's broadcast streams (SD and HD) although the 'astro' part of
>>the 'Astrometa' name suggested the possibility that you were including
>>satellite broadcast sources (but googling shows it only does DVB-C/T/T2,
>>not S).
>>
> I archive a lot of films and TV, mostly from binary Usenet groups or
> torrents, but the eight tuners in fact often becomes the equivalent of
> four as I allow a two minute and five minute overlap at the beginning
> and end of recordings.
When I got my first DVB-T adapter about 11 years ago now, a box slightly
bigger than a pack of 20 super-long cigarettes with a USB1 port. The
"USB2" reference on the packaging implied, rather misleadingly, that the
interface was the faster USB2 standard when, all along, they were simply
highlighting the bleedin' obvious fact that it could be plugged into
*any* USB2 port on account of the built in backwards compatibility with
the USB1 standard that was part of the USB2 spec. A prime example of
"Marketing" at its usual misleading best (phrase claims for the product
in such a way as to encourage the 'victim' (customer) to read more into
the blurb than is actually being claimed - caveat emptor and let the
Devil take the hindmost).
Anyway, grumble aside, I was able to take great joy in (at long last!)
being able to record off-air TV streams. My previous analogue TV tuner
adapters had been fine for watching TV programmes in *full frame* but
were a miserable failure as far as recordings went unless you'd spent a
small fortune on a high end adapter with its own on-the-fly compress to
MPG video hardware or else had a 10GB or larger HDD and a powerful CPU
when HDDs in typical use at that time had only just reached the 8GB mark.
The advent of Freeview was a Godsend as far as the PC enthusiasts who
looked on with envy at those able to afford high priced and overspecced
PCs needed to record analogue TV broadcasts with only a modicum of
bother. At last, the storage and processing requirements had been slashed
at a single stroke by virtue of the broadcasters doing all the hard work
for you. :-) Without built in hardware compression, an analogue system
needed to store about 1GB for each ten minute's worth of uncompressed
video (about 6GB per hour's worth of programme - a rather tall order for
entry level PCs of the day).
Once I started recording Freeview TV programmes, it swiftly turned into
a bit of an obsession which was only kept in check (even when recruiting
a laptop as a recording schedule conflict resolver) by the limitations of
one tuner per programme and no overlapping paddings allowed.
Going over to Linux and Kaffeine last year opened my eyes to a totally
new world of recording Freeview broadcasts. The transition was, as I've
previously described it, rather like being released from a straitjacket.
Now I was genuinely able to record more TV than I could watch 'Live' as
DTVR had more or less obliged me to do.
It wasn't so much a gathering of even more programmes to add to my
collection so much as to grab the repeats in order to choose the least
end credit vandalised airings. To this end, I was able to really go OTT
compared to what had gone before.
Since I recently started getting to grips with "Get_iplayer" around
about 3 or 4 weeks ago, my off-air recording activity is now mostly to
provide a safety net to guard against any problems with iplayer sourced
material and to capture those programmes that, rather curiously, aren't
available for later viewing with iplayer (pretty well all those classic
sitcoms being aired early to mid afternoon by BBC2 - Some Mothers..., Hi
de Hi, Open All Hours and so on). Consequently, the need to record
'endless repeats' has now largely evaporated (If I've already got an
iplayer sourced recording, typically, but not always, in 1280 by 720
"HD", I know there's nothing to be gained by recording yet another repeat
showing of the programme in SD quality. TBH, I'm still learning to adjust
to this novel state of affairs.
>
>> JOOI, can you record all TV streams in a single mux using WMC and
>>DVBViewer? I know some folk have used VLC in windows to capture the full
>>mux data stream from which they can later hive off individual channel
>>streams in a post processing exercise which seems as close to Kaffeine's
>>ability to record each TV stream to seperate files without regard to
>>padding overlap conflicts with back to back programmes across the whole
>>mux. Scheduling conflicts in Kaffeine only arise when you don't have
>>enough tuners to cover programmes being aired simultaneously on
>>different muxes.
>>
> DVBViewer will record a complete mux but WMC won't. I tried doing this
> for a while but found that separating and editing the different programs
> that I wanted to archive took so long that it was easier to just record
> the programs individually.
Recording a whole mux at a time for later slicing and dicing of the
individual TV channel streams does have the charm that there's no need to
use padding to guard against scheduling tomfoolery. The idea of
recording each 24 hour day's worth from each and every Freeview mux might
seem like a neat way to "Have your cake and eat it" (never miss a raved
about programme you forgot to add to the schedule being the most
attractive aspect) but, as you've discovered, this can lumber you with a
lot of 'hard work' in the post processing of those data streams.
Using Kaffeine allows me to achieve the same end result without the need
to sift out programme streams from a full mux's worth of a data stream
file. Whatever I select from the epg gets its own individual file
(sometimes even in duplicate on those occasions when I've not noticed the
duplicate entry due to an edit of a programme's epg entry by the
broadcaster and I've effectively selected both, each with the same start
and end times!).
Indeed, on those rare occasions where the duplication has been the
result of the running order of two back to back programmes being switched
around, I've simply selected all four epg entries to save me the bother
of trying to work out the truth of the matter. I simply delete the
incorrectly named versions afterwards in a "Shoot first, ask questions
later." mode of operation. I know that if they're both half or one hour
programmes that have been swapped around, I could simply record each one
without duplication and sort out any renaming that might arise afterwards
but, quite simply, renaming is more work than simply deleting the surplus
duplicates. :-)
--
Johnny B Good