[mythtv-users] Commflagging in the UK?

[Another Sillyname]

Guys

The potential 'Time Drift' issue is fairly easy to
address.......generate say a couple of hundred CRC reference frames
around the program start time.  A number of users (more is better)
upload these frame CRC reference numbers to a DB and a few members do
manual cuts......using the pooled data should give us all a pretty
accurate downloadable cut list.

There are potential issues with transmitters in different areas doing
different transmissions even of the same channel....If I understood it
correctly some of the Mux's do dynamic allocation of bandwidth
according to the requirements of ALL the channels on that Mux.   As we
do have regional variations on adverts and promo's it may well affect
the bandwidth and therefore digital profile of the received signal.

J

On 27/03/2008, Graham Wood <mythtv-users at spam.dragonhold.org> wrote:
>
>  > Any centralised database may have trouble picking out the programme within a
>  > recording. If I start all my recordings 5 minutes early and the next bloke
>  > does his 2 minutes early, the cut lists won't match. Also channels like
>  > Film4 broadcast a film multiple times, but have the same title. Unless there
>  > is some way of digitally finding the finding to actual start of a programme
>  > in the stream...
>
> The advantage of ntp is that the cutlist can be passed around as a
>  "real" time, rather than an offset.  If the adverts start at
>  20:13:45.5, then that could easily be at 13:45.5 into one recording,
>  and 23:34.5 into another...
>
>  The metadata available through myth (e.g. channel name, times, etc)
>  would be necessary for this to work anyway, and would at the same time
>  solve this issue.  THe +1 channels could be handled as a special case,
>  and make use of the same cutlist with an offset.  This wouldn't work
>  for repeat showings because the advert breaks are not necessarily at
>  the same time - delays in starting, and/or just different adverts...
>
>  It's not a completely formed idea - but I do think that it could be a
>  very useful one, since I'm lazy and don't actually bother with cutting
>  out the adverts... But if it's something that I could do to help
>  others (as well as get that help in return), I think I'm more likely
>  to do it.
>
>  I've not really looked into the way that cutlists/commercial flagging
>  works - so maybe it would be worth doing so to get something in place.
>  ;)
>
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