[mythtvnz] Commercial Flagging

[David Moore]

I couldn't resist having a go at SoX (which is in Ubuntu repositories). 
It's relatively easy to get stats out of an audio file with:

sox <infile> -n trim <start time> <duration> stat

or

sox <infile> -n trim <start time> <duration> stat

The "-n" just means no output. To analyse a file in small time 
increments you need to feed sox the start time and duration via the trim 
option.

Pipe to file or prog then analyse "Crest factor" and maybe max/min 
values to try and find compressed audio. Easy. :)

Found this interesting page also:

http://www.axino-tech.co.nz/documents/Ads%20on%20TV%20are%20louder.html

David