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 Post subject: Too early cuts
PostPosted: Wed Oct 04, 2017 6:39 pm 
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Joined: Wed Dec 07, 2011 12:37 am
Posts: 130
Hi!

Have been using comskip since 2008, with the same comskip.ini which has been working really great during all years, until a few versions ago. The latest comskip versions are setting cut marks too early, between 5-7 seconds, before the commercial block begins. Annoying as heck cuz comskip no longer follows the logodetection logic and show segments with logo still showing gets cutted out. Show and logo detection after commercial block still works good though. Have been looking for a way to tweak these timings but there are non. Something has changed. What should i do?

Quote:
detect_method=111 ; 1=black frame, 2=logo, 4=scene change, 8=fuzzy logic, 16=closed captions, 32=aspect ration, 64=silence, 128=cutscenes, 255=all
validate_silence=1 ; Default, set to 0 to force using this clues if selected above.
validate_uniform=1 ; Default, set to 0 to force using this clues (like pure white frames) if blackframe is selected above.
validate_scenechange=1 ; Default, set to 0 to force using this clues if selected above.
verbose=0 ; show a lot of extra info, level 5 is also OK, set to 0 to disable
max_brightness=60 ; frame not black if any pixels checked are greater than this (scale 0 to 255)
test_brightness=40 ; frame not pure black if any pixels checked are greater than this, will check average brightness (scale 0 to 255)
max_avg_brightness=25 ; maximum average brightness for a dim frame to be considered black (scale 0 to 255) 0 means autosetting
max_commercialbreak=600 ; maximum length in seconds to consider a segment a commercial break
min_commercialbreak=25 ; minimum length in seconds to consider a segment a commercial break
max_commercial_size=125 ; maximum time in seconds for a single commercial or multiple commercials if no breaks in between
min_commercial_size=4 ; mimimum time in seconds for a single commercial
min_show_segment_length=250 ; any segment longer than this will be scored towards show.
non_uniformity=500 ; Set to 0 to disable cutpoints based on uniform frames
max_volume=500 ; any frame with sound volume larger than this will not be regarded as black frame
min_silence=12 ; Any deep silence longer than this amount of frames is a possible cutpoint
ticker_tape=0 ; Amount of pixels from bottom to ignore in all processing
logo_at_bottom=0 ; Set to 1 to search only for logo at the lower half of the video, do not combine with subtitle setting
punish=0 ; Compare to average for sum of 1=brightness, 2=uniform 4=volume, 8=silence, 16=schange, set to 0 to disable
punish_threshold=1.3 ; Multiply when amount is above average * punish_threshold
punish_modifier=2 ; When above average * threshold multiply score by this value
intelligent_brightness=0 ; Set to 1 to use a USA specific algorithm to tune some of the settings, not adviced outside the USA
logo_percentile=0.92 ; if more then this amount of logo is found then logo detection will be disabled
logo_threshold=0.75
punish_no_logo=1 ; Default, set to 0 to avoid show segments without logo to be scored towards commercial
aggressive_logo_rejection=0
connect_blocks_with_logo=1 ; set to 1 if you want successive blocks with logo on the transition to be regarded as connected, set to 0 to disable
logo_filter=0 ; set the size of the filter to apply to bad logo detection, 4 seems to be a good value.
cut_on_ar_change=1 ; set to 1 if you want to cut also on aspect ratio changes when logo is present, set to 2 to force cuts on aspect ratio changes. set to 0 to disable
delete_show_before_first_commercial=1 (0=disabled / 1=on / 2-MAXINT amount of seconds) ; Any part of the show that comes before the first commercial is deleted when that part is shorter then added_recording (1) or the amount of seconds set (2 or more).;;To be used when the recording may start before the actual show and there is always a commercial break separating the two shows.
delete_show_after_last_commercial=1 (0=disabled / 1=on / 2-MAXINT amount of seconds) ; set to 1 if you want to delete the last block if its a show and after a commercial
delete_show_before_or_after_current=1 (0=disabled / 1=on / 2-MAXINT amount of seconds) ; set to 1 if you want to delete the previous and the next show in the recording, this can lead to the deletion of trailers of next show
delete_block_after_commercial=0 ; set to max size of block in seconds to be discarded, set to 0 to disable
remove_before=0 ; amount of seconds of show to be removed before ALL commercials
remove_after=0 ; amount of seconds of show to be removed after ALL commercials
shrink_logo=5 ; Reduce the duration of the logo with this amount of seconds
before_logo=0 ; Cutpoints can be inserted just before the logo appears. Set value set is the amount of seconds to start a search for a silence before the logo appears.
after_logo=1 ; set to number of seconds after logo disappears comskip should start to search for silence to insert an additional cutpoint
two_pass_logo=0
padding=0
ms_audio_delay=5
volume_slip=40
skip_b_frames=0 ; Set to 1 to force Comskip to skip frames for higher processing speed.
max_repair_size=200 ; Will repair maximum 200 missing MPEG frames in the timeline, set to 0 to disable repairing for players that dont use PTS.
disable_heuristics=4 ; bit pattern for disabling heuristics, adding 1 disables heristics 1, adding 2 disables heristics 2, adding 4 disables heristics 3, 255 disables all heuristics
delete_logo_file=1 ; set to 1 if you want comskip to tidy up after finishing
hardware_decode=0 ; (0=off/1=on)
output_incommercial=0
output_default=0 ; This dis/enables the default .txt output file.
output_debugwindow=0 ; This switched the regular comskip to ComskipGUI behaviour
output_framearray=0 ; create a big excel file for detailed analysis, set to 0 to disable
output_data=0 ; create a dump of the user data channel, used for CC and XDS (such as V-Chip info). Can be use together with output_framearray to remote debug CC decoding
output_videoredo=1 ; The old videoredo format
output_videoredo3=0 ; The new videoredo v3 format.
output_womble=0
output_mls=0 ; set to 1 if you want MPeg Video Wizard bookmark file output
output_cuttermaran=0
output_mpeg2schnitt=0
output_mpgtx=0
output_dvrcut=0
output_zoomplayer_chapter=0
output_zoomplayer_cutlist=0
output_edl=0
edl_skip_field=3 ; Set to 3 to have better skipping on XBMC, 0 XBMC cuts out the commercials
output_dvrmstb=0 ; Set to 1 if youre running DVRMS-Toolbox
output_edlx=0
output_vcf=0
output_bsplayer=0
output_btv=0 ; set to 1 if you want Beyond TV chapter cutlist output
output_projectx=0 ; set to 1 if you want ProjectX cutlist output (Xcl)
output_avisynth=0
output_vdr=0 ; set to 1 if you want XBMC to skipping commercials
output_demux=0 ; set to 1 if you want comskip to demux the mpeg file while scanning
live_tv=0 ; set to 1 if you use parallelprocessing and need the output while recording
live_tv_retries=4 ; change to 16 when using live_tv in BTV, used for mpeg PS and TS
dvrms_live_tv_retries=300 ; only used for dvr_ms
standoff=0 ; change to 8000000 when using live_tv in BTV
thread_count=8 ; default is: thread_count=1 , Set to 2 (50% speed increase on HD) or 4 (100% speed increase on HD) to use more threads for decoding
cuttermaran_options="cut=\"true\" unattended=\"true\" muxResult=\"false\" snapToCutPoints=\"true\" closeApp=\"true\""
mpeg2schnitt_options="mpeg2schnitt.exe /S /E /R25 /Z %2 %1"
avisynth_options="LoadPlugin(\"MPEG2Dec3.dll\") \nMPEG2Source(\"%s\")\n"
dvrcut_options="dvrcut \"%s.dvr-ms\" \"%s_clean.dvr-ms\" "
windowtitle="Comskip - %s"


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 Post subject: Re: Too early cuts
PostPosted: Wed Oct 04, 2017 6:55 pm 
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Joined: Sun Aug 21, 2005 3:49 pm
Posts: 3209
Can you follow the "how to ask for help" as I do not see that behavior in my test files


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 Post subject: Re: Too early cuts
PostPosted: Wed Oct 04, 2017 8:01 pm 
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Joined: Wed Dec 07, 2011 12:37 am
Posts: 130
Hello erik!

Did some backtracing and pinpointed this change as the culprit.
Quote:
Changes on 0.81.094
- Improved processing of logo based cutpoints

0.81.093 - places the cutpoint 5 seconds (after logo disappears) into the commercial block.
0.81.094 - shaves consequently off 10 seconds on that time for each commercialbreak rendering 5 seconds of show segment gets dropped after VRD edits the cutpoints.

The improved processing of logo based cutpoints is a bit too effective/greedy in my case.
Do you still need a sample?

Regards
Jagad


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 Post subject: Re: Too early cuts
PostPosted: Sat Oct 07, 2017 11:33 am 
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Joined: Wed Dec 07, 2011 12:37 am
Posts: 130
Ok, the above issue of mine was fixable by tweaking the following setting on 0.81.094 and higher:
Quote:
shrink_logo=0 ; Reduce the duration of the logo with this amount of seconds

shrink_logo was set to default of 5 seconds (maybe this should change in coming releases). It was a bit tricky to find a solution because the setting name and description is very confusing, considering what it seemingly are doing on newer comskip versions...namely set cutpoint x seconds before logo disappears. Wouldnt it be better if shrink_logo sets the cutpoint x seconds after logo disappears?


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 Post subject: Re: Too early cuts
PostPosted: Sat Oct 07, 2017 3:40 pm 
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Joined: Sun Aug 21, 2005 3:49 pm
Posts: 3209
This is what it should do
as you now get cuts exactly on where the logo comes/go's (when you enable logo based cutting) you will notice that when you shrink logo you may remove show.
So when you enable logo based cutting you better set shrink_logo=0


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 Post subject: Re: Too early cuts
PostPosted: Sat Oct 07, 2017 4:29 pm 
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Joined: Wed Dec 07, 2011 12:37 am
Posts: 130
erik wrote:
This is what it should do
as you now get cuts exactly on where the logo comes/go's (when you enable logo based cutting) you will notice that when you shrink logo you may remove show.
So when you enable logo based cutting you better set shrink_logo=0
Yeah, with shrink_logo=0 the cuts are exactly on where the logo goes (2 hundreds of a second prior to disappearance) which is pretty amazing. Versions before 094 obviously wasnt working that well in this regard. Nicely done erik on that very good improvement :)

What i meant with my question was if an expand_logo (opposite of shrink_logo) setting might be needed?


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 Post subject: Re: Too early cuts
PostPosted: Sat Oct 07, 2017 5:03 pm 
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Joined: Sun Aug 21, 2005 3:49 pm
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Was already looking if negative values might be an option


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 Post subject: Re: Too early cuts
PostPosted: Sat Oct 07, 2017 7:30 pm 
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Joined: Wed Dec 07, 2011 12:37 am
Posts: 130
Oh Yes even better if possible :)
Negative values for shrinking logo and positive values for expanding logo :)


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