[mythtv-users] Commercial Skip Questions

[Chris Pinkham]

> When the commercial detection gets it right (an amazingly high number 
> of times for me, as long as the channel is "clean" on reception), then 
> I find its often off by 3-10 frames... I don't know that this really 
> matters in viewing, but as a perfectionist type, when I go through to 
> double check and edit any mistakes, I find many of the cuts just a 
> shade off... seems like it came close...
> 
> Just as a thought, is it somehow lagging and tagging where it has 
> gotten to (a fraction of a second later) instead of where it was aiming 
> at?

It's all digital, so there's no lagging involved.  There is some code
in there to try to eliminate making you watch the blank frames.  Going
from memory (which may not be 100% accurate), I think it adjusts the
start mark to the first blank frame before the commercial break and
the end mark to the first non-blank frame after.  This is done since
the actual commercial may be 30 seconds long, but there may be 5-7 blank
frames separating the commercial from the show.  I don't want the code
to be too sloppy in it's length checking because that gets a lot of false
positives, so it is stricter on time then post-adjusts the marks.  There
is a setting that allows you to make the length checking a little looser
or stricter but I don't think that has anything to do with what you're
seeing.

Can you let me know what shows this seems to happen on regularly and I'll
try to take a look sometime?

-- 

Chris