[mythtv-users] Commercial Flagging, what are the best

cardboil cardboil at gmail.com
Wed Dec 21 11:17:06 EST 2005


In my experience, blank frame detection (with strict detection) works great
most of the time in many US channels (at least the major networks).
However, outside the US, many channels don't do blank frames.  On those
channels, I use logo detection and that works like a charm.  Of course, that
assumes that the broadcaster turns off the logo during commercials (which
many of them do).  I do have a few channels where neither blank frames nor
logo off/on is used by the network.  In those cases, I think I'm out of
luck.  I tried scene change detection and it hasn't worked well, plus it
wrongly flags scenes changes inside the show or in the midst of comm breaks.

I wonder if the mythcommflag code catches things like volume levels (many of
my channels turn noticeably louder during comm breaks).

May be Chris P can give us some pointers?


On 12/13/05, Steve Adeff <adeffs at gmail.com> wrote:
>
> On Tuesday 13 December 2005 12:04, Beny Spensieri Jr wrote:
> > >From: Phil Bridges <gravityhammer at gmail.com>
> > >On 12/13/05, Beny Spensieri Jr <benyjr at yahoo.ca>
> >
> > wrote:
> > >> I have found that the commercial flagging feature
> >
> > of
> >
> > >> Mythtv is not doing a great job of flagging
> > >> commercials.  As a result, playback is not skipping
> > >> the commercials as I have indicated.
> > >>
> > >> Any advise on what combination of settings will
> > >> produce the most accurate commercial detection?
> > >>
> > >> Thanks,
> > >>
> > >> Beny
> > >
> > >Just out of curiosity - have you set the frontend to
> > >automatically
> > >skip commercials?  Are you using the 'z' key to skip?
> > >
> > >What are your current detection settings?
> >
> > I initially set it to blank frame detection, which
> > didn't work very well.  Then I set it to blank frame +
> > scene change, this is also not great.
> >
> > I have now set commercial detection to ALL, but I have
> > yet to record and test anything yet.
> >
> > I have set playback to automatically skip the
> > commercials.
> >
> > Anything else?
> >
> > Thanks,
> >
> > Beny
>
> I have mine set to ALL currently with manual skipping and find it to be
> quite
> accurate on about 90% of the channels I've recorded with about 75%
> accuracy
> on the last 10%. It seems to sometimes find too many or not enough
> commercial
> points when it gets it wrong.
>
> I'm in the U.S.
>
> --
> Steve
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>
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