Comskip Support Forum

Comskip is a free commercial detector, browse the forum for more information
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PostPosted: Mon Nov 27, 2017 10:20 pm 
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Hi,

I'm a new Comskip user, just some initial tests done but looks really promising! I'm using Comskip with VDR. VDR has a plugin "markad" for the same purpose, but Comskip seems to be doing much better work.

One thing I noticed, there is a "Closed Captions" detection method. This doesn't seem to understand DVB subtitle streams. Most Finnish channels use DVB subtitling, not teletext based closed caption..

Commercials are never subtitled, so having active subtitles on DVB subtitle channel would be a strong indication that we are not inside a commercial.


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PostPosted: Tue Nov 28, 2017 9:04 am 
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Joined: Sun Aug 21, 2005 3:49 pm
Posts: 3107
Can you get me a example recording so I can test?


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PostPosted: Tue Nov 28, 2017 4:06 pm 
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Joined: Mon Nov 27, 2017 10:12 pm
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Thanks for the prompt reply! :)

http://zuik.org/testvid.ts

It's about 30MB in size.

Note that this clip also has some burned in english subs, but finnish subs are in DVB subtitle track. Dump from ffmpeg:

Code:
Input #0, mpegts, from '00001.ts':
  Duration: 00:00:33.62, start: 13485.319578, bitrate: 8802 kb/s
  Program 132
    Stream #0:0[0x5b4]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(tv, bt709), 1280x720 [SAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 100 tbc
    Stream #0:1[0xde8](fin): Audio: mp2 ([4][0][0][0] / 0x0004), 48000 Hz, stereo, s16p, 224 kb/s
    Stream #0:2[0x1937](fin): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)


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PostPosted: Mon Dec 04, 2017 6:51 pm 
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Any luck with this? :)


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PostPosted: Mon Dec 04, 2017 10:36 pm 
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Joined: Sun Aug 21, 2005 3:49 pm
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Did not have time yet.....


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PostPosted: Sat Dec 09, 2017 6:11 pm 
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I already have other ideas. :D

Some "C More" satellite channels have separate SD and HD versions, and the HD version is marked by "HD" logo on top right corner. This logo stays there always, even during commercials. The actual channel logo is a bit to the left of this HD logo, and that does disappear during commercials.

Comskip always seems to find only the "HD" part and then disables logo completely because it is enabled 100% of time. Is it possible to set the logo detection area in pixels, so it would only scan the part without HD? This would make scanning faster too.

Then, another suggestion. :) C More programs usually have dolby digital 5.1 sound, but commercials only have 2 channel stereo. I don't see Comskip using this info?


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PostPosted: Sun Dec 10, 2017 8:30 am 
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Joined: Mon Nov 27, 2017 10:12 pm
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I fixed the logo problem already. I manually edited shorter clip with only full logo shown, and comskip detected that correctly. Then saved the logo and now passing it with --logo parameter, works perfectly. :)

Edit: ah sorry for the trouble. :D Just found out about "cut_on_ac_change" and "ac_wrong_modifier" config parameters. :) They were not present in my base ini file.

Edit2: Just donated something to your paypal. :) Thanks for this excellent software!


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