Mailing List Archive

Recording overlap on same channel
Hi,
This is either a request for help or a feature request. :D

I record Star Trek Enterprise on Sundays in the UK.
2 episodes are broadcast one after the other on Channel 4.

However, because of clock skew etc, it is impossible to get each recording in completeness because a bit of one might be tagged onto the end of the other, and because I have only 1 encoder, can't schedule them to overlap, one ending a little later, the other a little earlier to cope with clock differences, or the broadcasts being late/early.

However, in theory this should be possible as long as the 2 recordings are on the same channel. It's just that the same piece of video would end up in 2 records with some jiggery-pokery to make it happen.

Therefore, is it possible to arrange for consecutive recordings on the same channel to overlap and to not cause a conflict?

Cheers,
Ralph

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Re: Recording overlap on same channel [ In reply to ]
On 5/4/05, Ralph Little <ralph.little@tribaltechnology.co.uk> wrote:
>
>
> Hi,
> This is either a request for help or a feature request. :D
>
> I record Star Trek Enterprise on Sundays in the UK.
> 2 episodes are broadcast one after the other on Channel 4.
>
> However, because of clock skew etc, it is impossible to get each recording
> in completeness because a bit of one might be tagged onto the end of the
> other, and because I have only 1 encoder, can't schedule them to overlap,
> one ending a little later, the other a little earlier to cope with clock
> differences, or the broadcasts being late/early.
>
> However, in theory this should be possible as long as the 2 recordings are
> on the same channel. It's just that the same piece of video would end up in
> 2 records with some jiggery-pokery to make it happen.
>
> Therefore, is it possible to arrange for consecutive recordings on the same
> channel to overlap and to not cause a conflict?
>
> Cheers,
> Ralph

Ralph,

If it's clock skew, have you got ntp working on the recording machine?
I found that recording 3rd Rock on ITV2 (2 consecutive programs, each
30 mins) there was almost never a problem recording (maybe 6 out of
the 120+ episodes had the first 10-20 seconds of the second show
recorded at the end of the first recording). Using my DVB card, there
is a second or two 'missing' as one recording ends and the next starts
(not a problem for me).

If Enterprise is on at the same time each week, you could also use a
manual recording instead to record the full 2 episode length each week

On your idea, I think this would be a very useful feature to have the
option of using, however, if you have several recordings in a row it
could get to be a pain to navigate through the file to individual
shows.

Nick
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Re: Recording overlap on same channel [ In reply to ]
> On 5/4/05, Ralph Little <ralph.little at tribaltechnology.co.uk>
wrote:
> >
> >
> > However, because of clock skew etc, it is impossible to get each
recording
> > in completeness because a bit of one might be tagged onto the end of
the
> > other, and because I have only 1 encoder, can't schedule them to
overlap,
> > one ending a little later, the other a little earlier to cope with
clock
> > differences, or the broadcasts being late/early.
> >
> > However, in theory this should be possible as long as the 2
recordings > are
> > on the same channel. It's just that the same piece of video would
end up > in
> > 2 records with some jiggery-pokery to make it happen.
> >
> > Therefore, is it possible to arrange for consecutive recordings on
the > same
> > channel to overlap and to not cause a conflict?
> Ralph,
>
> If it's clock skew, have you got ntp working on the recording machine?
> I found that recording 3rd Rock on ITV2 (2 consecutive programs, each
> 30 mins) there was almost never a problem recording (maybe 6 out of
> the 120+ episodes had the first 10-20 seconds of the second show
> recorded at the end of the first recording). Using my DVB card, there
> is a second or two 'missing' as one recording ends and the next starts
> (not a problem for me).
>
> If Enterprise is on at the same time each week, you could also use a
> manual recording instead to record the full 2 episode length each week
>
> On your idea, I think this would be a very useful feature to have the
> option of using, however, if you have several recordings in a row it
> could get to be a pain to navigate through the file to individual
> shows.
>
> Nick

Yes, it is a good idea to record manually - for some bizarre reason, I
did not think of this - record both in one go and split it afterwards.

I do have ntp running for clock sync - I think it is more likely that
the shows are not scheduled exactly on time in my case :(

If anybody would be willing to take this on, I (and I think many
others!) would be delighted and would be a valuable addition to the
product!

Just wish I had the time to do it myself :(

Cheers,
Ralph

----------------------------------------------------------------------------------------
This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. Access, copying, dissemination or re-use of information in it by anyone else is unauthorised. If you have received this message in error, please contact me on the above number.