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PostPosted: Sun Jan 06, 2019 3:54 pm 
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Joined: Sun Jan 06, 2019 3:37 pm
Posts: 1
Hi,

I just started with Comskip. Thanks for your great effort on this!

While playing around with recordings on RTL HD I noticed that the detection is not working as expected. What happens is:

The show runs. When the commercial starts the logo disappears but there seems to be no black frame. After 20-30 seconds there seems to be the first black frame and a block of commercials is detected. So I tried to tweak this with

after_logo=2

in order to force a black frame whenever the logo disappears. I can see

Code:
Start logo cblock 15   frame 28200
 0:21:31 - 33556 frames in 100.66 sec(333.36 fps), 1.00 sec(398.00 fps), 43%
End logo block 15   frame 32475   Length - 0:02:46.00
 0:21:51 - 34065 frames in 101.66 sec(335.09 fps), 1.00 sec(509.00 fps), 43%
            Nonlogo Length - 0:00:22.00
Start logo cblock 16   frame 33025

End logo block 16   frame 33175   Length - 0:00:01.00

Frame  34160 (1366.320s) - Black frame with brightness of 16,uniform of 0 and volume of 3569
Frame  34161 (1366.360s) - Black frame with brightness of 16,uniform of 0 and volume of -1


With 32475 being the frame where the logo disappears at the beginning of the commercial. I cannot see that a black frame is created however.

Code:
Logo start -  27450   end -  27525   length - 0:00:03.00   before:865.3 s    after:232.1 s
Logo start -  28325   end -  32475   length - 0:02:46.00   before:900.3 s    after:34.1 s
Logo start -  33150   end -  33175   length - 0:00:01.00   before:1093.3 s    after:6.1 s
Logo start -  42025   end -  42475   length - 0:00:18.00   before:5.8 s    after:255.8 s
Logo start -  42775   end -  43150   length - 0:00:15.00   before:35.8 s    after:228.8 s


Code:

Black Frame List
---------------------------
Black Frame Count = 147
nr    frame   pts   bright   uniform   volume      cause   dimcount  bright   type
  0     5817    232.640       16        0      400              b         0        0   P
-----------------------------
  1    33328   1333.080      107    29237       10          l         18346      178   P
-----------------------------
  2    34160   1366.360       16        0        2              b         0        0   I
  3    34161   1366.400       16        0        2              b         0        0   B
  4    34162   1366.440       16        0        2              b         0        0   B
  5    34163   1366.480       16        0        2              b         0        0   P
-----------------------------
  6    34664   1386.520       16        0        0              b         0        0   I


I also find

Code:
Frame  33328 (1333.080s) - Cutpoint added 6 seconds after Logo disappears at change percentage of 94



Later:

Code:
Fuzzy scoring of the blocks
---------------------------
Block 0 has logo.
Block 0 score:   Before - 1.00   After - 0.01
Block 0 has twice excess length.
Block 0 score:   Before - 0.01   After - 0.00


and
Code:
----------------------------------------------------
Block list after weighing
----------------------------------------------------
  #     sbf  bs  be     fs     fe        ts        te       len     sc   scr cmb   ar                   cut    bri logo   vol sil   corr stdev   cc
  0:++    0   0   0      1  33327     0.00s  1333.04s  1333.04s   0.00  0.07   0 1.78            EL    l       556- 0.75 1583- 74-  0.000    55
  1:--    3   1   2  33328  34161  1333.08s  1366.40s    33.32s   2.00  0.08   0 1.78             L        b   828- 0.00 1877+ 88+  0.000    82


What can I do to teach Comskip to recognize the logo disappearing in frame 32475? Is there any way to detect these kind of commercials?



Regards,
JP


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PostPosted: Tue Jan 22, 2019 12:33 pm 
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Site Admin

Joined: Sun Aug 21, 2005 3:49 pm
Posts: 3275
There should be some options.
Can you follow the "how to ask for help" post and send me the generated zip file?


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