[mythtv-users] Two odd issues with NBC DTV recordings

[Tom Dexter]

On Wed, Oct 1, 2008 at 11:44 PM, Yeechang Lee <ylee at pobox.com> wrote:
> Tom Dexter <digitalaudiorock at gmail.com> says:
>> I record OTA DTV broadcast out of New York City.
>
> I'm in San Francisco.
>
>> First of all, very often when I jump ahead or back in the recording I
>> get temporary pixelation, almost as though it's not finding a key
>> frame or something.
>
> I've noticed this recently as well, yes.
>
>> The other thing I've noticed is that the preview images in mythweb
>> for all the same shows are solid black.  The offset used for
>> previews is set to 64 which must be the default as I've never set
>> it.
>
> I am recording _Knight Rider_ right now as a test.[1] MythWeb shows a
> proper preview image. I use 305 as my offset.
>

Thanks for the test.  I recorded one show off NBC last night and got a
black preview.  Maybe if that keeps happening I'll try increasing the
offset.

Is there any way for force a preview to regenerate?

Tom