With the latest release of mplayer (MPlayer-1.0rc1) there is a new video
filter called "blackframe". Which, as the title might give it away, it can
be run against a previously recorded mpeg and spit out the frames which it
thinks have are atleast 98% black. Mplayer also has a feature (I dont know
if it's new or not) called "edit decision list" which takes in a begin time,
end time, and action (skip or mute). Given these two features, I believe we
should be able to work commerical detection into Freevo in the near future.
I am currently working on a proof of concept at the moment and will release
a patch as soon as possible.
Example command to find blackframes (it takes about 40 minutes for an hour
show on my cpu):
/usr/local/bin/mencoder -ovc lavc -nosound -vf blackframe
/opt/media/tv/01-08_13_00_Days_of_our_Lives.mpeg -o /dev/null | grep
vf_blackframe > blackframes.txt
Which produces a file like this:
Pos: 252.6s 7571f ( 7%) 45.33fps Trem: 36min 345mb A-V:0.000 [803:0]
vf_blackframe: 7569, 99%, B (I:7562)
Pos: 252.6s 7572f ( 7%) 45.33fps Trem: 36min 345mb A-V:0.000 [803:0]
vf_blackframe: 7570, 99%, B (I:7562)
Pos: 252.7s 7573f ( 7%) 45.33fps Trem: 36min 345mb A-V:0.000 [803:0]
vf_blackframe: 7571, 100%, P (I:7562)
The example edl file should looks like this (0=skip, 1=mute):
252.6 252.7 0
-------------------------------------------------------------------------
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
opinions on IT & business topics through brief surveys - and earn cash
http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
_______________________________________________
Freevo-devel mailing list
Freevo-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/freevo-devel
