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Black bar detection not updating tag correctly

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mattkhan:
Great, I will redo my library tonight

Hendrik:
After some more progress analysing all my library, I'm seeing a lot more cases with low scores. Luckily for most of them the heuristic seems to still pick the right one, but the detections are all over the place. Unclear if those are mostly very dark videos, where the limit is catching stuff too aggressively, or something else. I'll be investigating some of those tomorrow.

On a quick glance adjusting the limit helps with those, but its hard to track if other files stop detecting their black bars if I lower it. Hard to find a compromise here. Running it twice with different values has some problems with the way we track values, but 25 seems pretty high, as shadowy scenes easily detect with that. Even going to 22 helps a lot already.

How common are dirty/elevated black bars, anyway? Did you have any where lower black level was a problem?

mattkhan:
I think this is a significant step forwards, well done!

I now see just 28 tracks that disagree with skip=24,limit=25/255

of those:

* VAR is as big a pain here as it is in football :)

https://www.blu-ray.com/movies/Aquaman-Blu-ray/227124/ is a good example, my analysis happens to look at the 1st hour, yours is more comprehensive which means you detect the 2nd half of the film being IMAX whereas mine sees the scope part

https://www.reddit.com/r/movies/comments/21jqpc/hunger_games_catching_fire_bluray_slowly_changes/ is another one
https://www.blu-ray.com/movies/TRON-Legacy-Blu-ray/18434/
https://www.blu-ray.com/movies/Top-Gun-Maverick-4K-Blu-ray/317486/

would be nice to add a VAR flag and hence allow for a profile driven choice on how to react

mattkhan:
here's one why I don't understand why it picked the wrong choice, it does say the score is low but not sure why

https://www.blu-ray.com/movies/American-Graffiti-Blu-ray/22698/


--- Code: ---Score: 1
Result: 0x0x1920x1080 (1.78)

0x136x1920x948 (2.36), 46% (538 samples), first at 00:00:46
0x0x1920x1080 (1.78), 4% (48 samples), first at 00:14:04
2x136x1186x948 (1.46), 2% (22 samples), first at 00:42:10
674x432x1306x948 (1.22), 2% (21 samples), first at 01:24:24
0x136x1156x948 (1.42), 1% (17 samples), first at 00:42:16
672x432x1308x948 (1.23), 1% (16 samples), first at 01:24:25
0x136x1836x948 (2.26), 1% (15 samples), first at 00:28:11
456x304x1920x948 (2.27), 1% (15 samples), first at 00:28:08
0x136x1192x948 (1.47), 1% (15 samples), first at 00:42:13
610x428x1298x948 (1.32), 1% (15 samples), first at 01:24:19
2x136x1182x948 (1.45), 1% (15 samples), first at 00:42:11
672x436x1304x948 (1.23), 1% (15 samples), first at 01:24:23
2x196x1306x948 (1.73), 1% (14 samples), first at 00:28:09
600x424x1304x948 (1.34), 1% (14 samples), first at 01:24:21
534x136x1830x948 (1.6), 1% (13 samples), first at 00:56:15
0x196x1312x948 (1.74), 1% (13 samples), first at 00:28:10
604x424x1304x948 (1.34), 1% (13 samples), first at 01:24:21
444x300x1920x948 (2.28), 1% (12 samples), first at 00:28:07
464x304x1920x948 (2.26), 1% (12 samples), first at 00:28:09
610x424x1302x948 (1.32), 1% (11 samples), first at 01:24:20
560x136x1868x948 (1.61), 1% (11 samples), first at 00:56:13
0x136x1624x948 (2), 1% (9 samples), first at 00:42:15
412x304x1920x948 (2.34), 1% (9 samples), first at 00:28:08
616x420x1304x948 (1.3), 1% (9 samples), first at 01:24:23
610x428x1302x948 (1.33), 1% (9 samples), first at 01:24:22
2x136x1162x948 (1.43), 1% (8 samples), first at 00:42:10
672x436x1308x948 (1.24), 1% (8 samples), first at 01:24:25
2x136x1838x948 (2.26), 1% (8 samples), first at 00:28:12
252x136x964x948 (0.88), 1% (8 samples), first at 00:42:16
616x424x1304x948 (1.31), 1% (7 samples), first at 01:24:23
2x136x1834x948 (2.26), 1% (7 samples), first at 00:28:11
2x136x1174x948 (1.44), 1% (7 samples), first at 00:42:11
606x424x1302x948 (1.33), 1% (6 samples), first at 01:24:20
544x134x1840x946 (1.6), 1% (6 samples), first at 00:56:14
102x136x1190x948 (1.34), 1% (6 samples), first at 00:42:14
102x136x1182x948 (1.33), 1% (6 samples), first at 00:42:14
384x136x1920x948 (1.89), 1% (6 samples), first at 00:56:17
2x136x1178x948 (1.45), 0% (5 samples), first at 00:42:13
552x136x1920x948 (1.68), 0% (5 samples), first at 00:56:17
608x424x1300x948 (1.32), 0% (5 samples), first at 01:24:20
0x196x1304x948 (1.73), 0% (5 samples), first at 00:28:09
528x136x1836x948 (1.61), 0% (5 samples), first at 00:56:16
608x424x1304x948 (1.33), 0% (5 samples), first at 01:24:21
350x136x1186x948 (1.03), 0% (5 samples), first at 00:42:10
240x136x1096x948 (1.05), 0% (5 samples), first at 00:42:15
0x136x1840x948 (2.27), 0% (5 samples), first at 00:28:12
572x136x1920x948 (1.66), 0% (4 samples), first at 00:56:20
672x440x1304x948 (1.24), 0% (4 samples), first at 01:24:23
452x304x1920x948 (2.28), 0% (4 samples), first at 00:28:07
142x136x1834x948 (2.08), 0% (4 samples), first at 00:56:19
560x134x1872x946 (1.62), 0% (4 samples), first at 00:56:13
612x424x1304x948 (1.32), 0% (4 samples), first at 01:24:22
354x136x1186x948 (1.02), 0% (4 samples), first at 00:42:10
254x136x978x948 (0.89), 0% (4 samples), first at 00:42:17
606x428x1298x948 (1.33), 0% (4 samples), first at 01:24:19
0x136x1112x948 (1.37), 0% (4 samples), first at 00:42:10
676x436x1304x948 (1.23), 0% (3 samples), first at 01:24:24
550x136x1858x948 (1.61), 0% (3 samples), first at 00:56:16
168x136x1920x948 (2.16), 0% (3 samples), first at 00:14:07
560x134x1868x946 (1.61), 0% (3 samples), first at 00:56:13
548x134x1840x946 (1.59), 0% (3 samples), first at 00:56:14
544x134x1844x946 (1.6), 0% (3 samples), first at 00:56:14
0x196x1920x948 (2.55), 0% (3 samples), first at 00:28:09
564x136x1868x948 (1.61), 0% (3 samples), first at 00:56:13
610x424x1298x948 (1.31), 0% (3 samples), first at 01:24:20
394x136x1918x948 (1.88), 0% (3 samples), first at 00:56:18
394x134x1706x798 (1.98), 0% (3 samples), first at 00:56:17
0x196x1308x948 (1.74), 0% (3 samples), first at 00:28:10
576x136x1920x948 (1.66), 0% (3 samples), first at 00:56:20
12x136x1920x948 (2.35), 0% (3 samples), first at 00:14:08
2x136x1766x948 (2.17), 0% (3 samples), first at 00:28:11
2x136x1798x948 (2.21), 0% (3 samples), first at 00:28:12
380x136x1920x948 (1.9), 0% (3 samples), first at 00:56:17
448x136x1920x948 (1.81), 0% (2 samples), first at 00:56:18
476x304x1920x948 (2.24), 0% (2 samples), first at 00:28:07
320x136x1096x948 (0.96), 0% (2 samples), first at 00:42:15
562x134x1870x946 (1.61), 0% (2 samples), first at 00:56:13
550x136x1834x948 (1.58), 0% (2 samples), first at 00:56:15
296x136x1096x948 (0.99), 0% (2 samples), first at 00:42:15
548x136x1860x948 (1.62), 0% (2 samples), first at 00:56:16
548x136x1836x948 (1.59), 0% (2 samples), first at 00:56:15
674x436x1306x948 (1.23), 0% (2 samples), first at 01:24:24
420x136x1920x948 (1.85), 0% (2 samples), first at 00:56:18
670x436x1306x948 (1.24), 0% (2 samples), first at 01:24:25
542x134x1846x946 (1.61), 0% (2 samples), first at 00:56:14
32x136x1172x948 (1.4), 0% (2 samples), first at 00:42:12
532x134x1824x946 (1.59), 0% (2 samples), first at 00:56:15
4x136x1920x948 (2.36), 0% (2 samples), first at 00:14:08
612x428x1300x948 (1.32), 0% (2 samples), first at 01:24:19
612x424x1300x948 (1.31), 0% (2 samples), first at 01:24:19
2x196x1314x948 (1.74), 0% (2 samples), first at 00:28:11
360x136x1164x948 (0.99), 0% (2 samples), first at 00:42:17
360x136x1168x948 (1), 0% (2 samples), first at 00:42:17
360x136x1172x948 (1), 0% (2 samples), first at 00:42:17
2x136x1794x948 (2.21), 0% (2 samples), first at 00:28:12
254x136x974x948 (0.89), 0% (2 samples), first at 00:42:17
0x136x1176x948 (1.45), 0% (2 samples), first at 00:42:12
244x136x1096x948 (1.05), 0% (2 samples), first at 00:42:15
0x136x1168x948 (1.44), 0% (2 samples), first at 00:42:11
460x304x1920x948 (2.27), 0% (2 samples), first at 00:28:07

--- End code ---

mattkhan:
another minor problem area is multiple streams and it playing the wrong one

https://www.blu-ray.com/movies/Harry-Potter-and-the-Deathly-Hallows-Part-2-Blu-ray/156262/

is an example

it picks some sort of interactive movie here whereas the film itself is in a different title, if I select that title as the one to play and then run black bars again, it still uses the default track. Shouldn't it respect my manual override in this case?

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