Media Centre (Vista) only recording 50 KB dvr-ms files for some programmes

[Mortimer]

Media Centre has been behaving perfectly until a couple of weeks ago when,
for some programmes (Holby City and Reel History of Britain) it creates very
small (50 KB) dvr-ms files which (rather obviously) are regarded as
corrupted by other player/editor software such as Windows Media Player and
VideoReDo. Other programmes record fine.

At first I thought it was related to the dreaded "there will not be enough
disk space to record this show" error which I've just fixed by setting WMC
to use the whole disk rather than being arbitrarily limited to 100 GB (on
the Settings -> TV menu. But a new recording (tonight's Reel History) still
has the same problem. I have 200 GB of free disk space, with 72 GB used in
the folder that WMC writes to.

The PC has a Hauppauge Nova-T DVB-T tuner with V3.11.27070.0 of the driver,
which Windows driver update thinks is the latest. Could it be a problem with
some programmes/channels supplying programmes in a new format that this
device cannot handle?

[Mortimer]

Post by Mortimer
Media Centre has been behaving perfectly until a couple of weeks ago when,
for some programmes (Holby City and Reel History of Britain) it creates
very small (50 KB) dvr-ms files which (rather obviously) are regarded as
corrupted by other player/editor software such as Windows Media Player and
VideoReDo. Other programmes record fine.

Oh, the embarrassment. I've worked out what it was. I shoudl ahve realised
the common factor - BBC channels. When I tried to watch those channels using
the Hauppauge TV viewer, I found that all the channels on the same multiplex
(BBC1, BBC2, BBC News Channel, CBBC) were dead. And my transmitter had its
digital switchover recently - I'd forgotten about it because I'm away from
home at the moment, accessing my PC by LogMeIn.

Having retuned WMC, normal service has been resumed.

However I've got the problem that the retune has stopped some channels (eg
ITV1) from displaying in the Guide. I fixed this before, ages ago, but I
can't remember how I did it.