[mythtv] RE: Commercial flagging during record

[Liam]

Yeah, I've seen the odd one. I assume this is something of a rarity and the 
chances of seeing two in a row are fairly slim, if this is the case then we'd 
see little islands of twenty or so seconds which we could disregard.

I think the most flexible and powerful way of using blackframe and content 
analysis would be to allow the user to pick which methods to use based on 
their hardware and the channel's characterisics. ie as well as flagging 
blackframes then teletext and/or logos could be scanned for at the same time 
so the eventual data would look something like:

at n seconds frames subtitles dissapeared.
at n+5 frames the logo dissapeared.
n+6 blackframe detected ...

Parsing this type of data might be a bit of a headache though. I reackon 
logo/blackframe/subtitles are the only processings that would give useful 
data for after the event, what do you think?

> I've seen commercials here with CC text in them. Can't cost an advertiser
> that much relative to the cost of a commercial and doesn't limit their
> audience, so I'm not sure if I would want to rely totally on that if I
> were someone. I could see adding it as an option later. Right now
> the code is setup as a sort of multiple choice for the detection methods,
> but maybe in the future when we can do offline scanning then it could
> be a group of items that determine whether there's a commercial or not.
> 
> > Cool, how much effort do you think it would be to pick up weather 
subtitles
> > are present or not? Then we could skip adverts without having to worry 
about
> > blankframes during the break, this could be used in conjunction with
> > blankframes to give exact starttimes.
> >
> > I'm dreaming of never seeing another coca-cola advert,
> > Liam
> 
> Chris