[mythtv-users] DVB recordings fail with: 'Warning: Unsupported bandwidth parameter'

Mike Perkins mikep at randomtraveller.org.uk
Tue Feb 14 17:28:14 UTC 2012

On 14/02/12 15:48, John Pilkington wrote:
> On 13/02/12 19:38, Mike Perkins wrote:
> <  after a frustrating but eventually successful forced channel rescan>
>> That would probably be too UK-specific a modification to make it worth while, I
>> suspect. We'll see. Can't be worse than what we have already, can it?
> I thought I should come back on this.  In fact the scanning process,
> even as it is now, can be quite slick if you know your transmitter.
> All that should be needed, at most locations in the UK, is the frequency
> of a single multiplex.  Given that, there is still scope for improvement
> in that some of the other parameters found during the scan don't always
> make it into the database.
> You had troubles because, as you found, there are also routes through
> the process that apparently don't converge to the desired configuration,
> at least with DVB-T in the UK, and there are no built in warnings that
> stop you taking them.  In fact, IIRC, you get to them first if you go
> through the setup procedure in sequence from the start.
> Anyway, rescanning shouldn't be needed often, and maybe it _will_ get
> better :-)
I agree, mostly, with the above remarks. The problem is that although I have 
what I thought was a decent enough directional aerial, and I'm only 8 miles from 
Hannington, I also get signals from Crystal Palace (about 70 degrees left) and 
South Oxfordshire (about 165 degrees left), one group before and one after those 
I'm interested in (also both are in different BBC/ITV regions). This means my 
channels get overridden as the scan progresses when I do a full scan.

It also means I get a horrible list of random transports at the end, with no 
obvious clue which transmitter they are.

Still, everything works for the moment, and that's what matters. Thanks for your 


Mike Perkins

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