[mythtv-users] How Does Commercial Flagging Work?

[Brad DerManouelian]

On May 14, 2008, at 8:33 AM, Darryl Hirschler wrote:

> How did I know somebody would say "look at the source"?  If we ever  
> want
> Linux to take off, we need to try to offer better explanations to
> people.
>
> Anyways, I believe the commercial flagging works by looking for a  
> blank
> frame.  I think it also studies the station logo.

Maybe if you looked at the source you would find that it's not scary  
and quite informative. Just looking at the mythcommflag directory  
gives a good indication at what commercial flagging does:

[mythtv at mythtv mythcommflag]$ ls
BlankFrameDetector.cpp          CommDetectorFactory.cpp   
PGMConverter.cpp
BlankFrameDetector.h            CommDetectorFactory.h    PGMConverter.h
BorderDetector.cpp              CommDetector.h           pgm.cpp
BorderDetector.h                CustomEventRelayer.h     pgm.h
CannyEdgeDetector.cpp           EdgeDetector.cpp         quickselect.c
CannyEdgeDetector.h             EdgeDetector.h           quickselect.h
ClassicCommDetector.cpp         FrameAnalyzer.cpp         
SceneChangeDetectorBase.h
ClassicCommDetector.h           FrameAnalyzer.h           
SceneChangeDetector.cpp
ClassicLogoDetector.cpp         HistogramAnalyzer.cpp     
SceneChangeDetector.h
ClassicLogoDetector.h           HistogramAnalyzer.h      SlotRelayer.h
ClassicSceneChangeDetector.cpp  Histogram.cpp             
TemplateFinder.cpp
ClassicSceneChangeDetector.h    Histogram.h               
TemplateFinder.h
CommDetector2.cpp               LogoDetectorBase.h        
TemplateMatcher.cpp
CommDetector2.h                 main.cpp                  
TemplateMatcher.h
CommDetectorBase.cpp            mythcommflag-analyze
CommDetectorBase.h              mythcommflag.pro

If more people looked at the source, Linux would "take off" faster....  
which, by the way, I'm not worried about. The fact that people who are  
afraid to look at the source are building MythTV systems is an  
indication of that. :)

-Brad