Avdump/AR

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AniDB AR Def

1.33:1 (4:3)	10
1.77:1 (16:9)	20
1.66:1	30
1.85:1	40
2.00:1	50
2.21:1	60
2.35:1	70

Ranges

w/h elsif less	anidb ar
1.25	Other
1.50	4:3
1.65	Other
1.68	1.66:1
1.70	Other
1.84	16:9
1.86	1.85:1
1.99	Other
1.01	2.00:1
2.20	Other
2.22	2.21:1
2.34	Other
2.36	2.35:1
	Other

By resolution

4:3

• 320 x 240
• 352 x 240 (non-square pixels), native NTSC Video CD - common (nwa)
• 352 x 288 (non-square pixels), native PAL Video CD - common (nwa)
• 384 x 288 (pelican)
• 512 x 368
• 512 x 384
• 576 x 432
• 640 x 480
• 720 x 540

16:9

• 640 x 352
• 640 x 360
• 640 x 368 (pelican)
• 704 x 384
• 704 x 392
• 704 x 396
• 704 x 400
• 720 x 400 (nwa: a bit off from actual 16:9, probably kept for mod16)
• 1024 x 576 (common under the tards)
• 1280 x 720
• 1920 x 1080
• 1920 x 1088

Anamorphic/wrong AR

• 704 x 480 NTSC DVD
• 720 x 480 NTSC DVD
• 720 x 576 PAL DVD

Rare/uncommon (unused)

• 480 x 360 4:3 - wouldn't call that common though
• 704 x 528 4:3 - ugh
• 800 x 448 16:9 - common?

• 480 x 320 3:2 HVGA (Computer Standard) - uncommon (nwa)
• 480 x 480 4:3 (non-square pixels), native NTSC SVCD - not that common (nwa)
• 480 x 576 4:3 (non-square pixels), native PAL SVCD - uncommon (nwa)
• 640 x 288 2.2:1 - a rather rarely used AR (nwa)
• 640 x 350 64:35 (approx. 9:5) EGA (Computer Standard) - rare (nwa)
• 720 x 432 1.66:1 (5:3) 35 mm European widescreen standard - rare (nwa)
• 800 x 600 4:3 SVGA (Computer Standard) - uncommon (nwa)
• 1024 x 768 4:3 XGA (Computer Standard) - rare (nwa)

MPEG-1 Standard

   1,
   0.6735,
   0.7031, //16/9 PAL
   0.7615,
   0.8055,
   0.8437, //16/9 NTSC
   0.8935,
   0.9157, //4/3 PAL
   0.9815,
   1.0255,
   1.0695,
   1.0950, //4/3 NTSC
   1.1575,
   1.2015,

MPEG-2 Standard

   1,
   4/3,
   16/9,
   2.21,

Sample Data

See Avdump/Resolution for the actual resolutions.

AR      count(*)
------  --------------------------
{null}	20223 (resolution not set)
0.66	1
0.67	40
0.75	1
0.76	1
0.79	2
0.83	18
0.93	1
0.94	6
0.95	42
0.96	2
1.00	182
1.06	2
1.07	2
1.08	1
1.10	2
1.11	1
1.16	2
1.17	4
1.18	30
1.19	5
1.20	10
1.21	54
1.22	977
1.23	87
1.24	69
1.25	625
1.26	146
1.27	134
1.28	81
1.29	370
1.30	659
1.31	1273
1.32	845
1.33	106965
1.34	743
1.35	571
1.36	2494
1.37	180
1.38	1041
1.39	450
1.40	70
1.41	119
1.42	155
1.43	267
1.44	104
1.45	127
1.46	114
1.47	3754
1.48	733
1.49	189
1.50	2700
1.51	48
1.52	84
1.53	38
1.54	63
1.55	16
1.56	55
1.57	9
1.58	11
1.59	3
1.60	84
1.61	7
1.62	2
1.63	11
1.64	21
1.65	9
1.66	10
1.67	103
1.68	77
1.69	43
1.70	8
1.71	32
1.72	17
1.73	196
1.74	582
1.75	69
1.76	532
1.77	436
1.78	14894
1.79	316
1.80	1019
1.81	156
1.82	2928
1.83	978
1.84	45
1.85	124
1.86	73
1.87	20
1.88	165
1.89	34
1.90	187
1.91	56
1.92	6
1.93	2
1.95	23
1.96	62
1.97	4
1.98	15
1.99	22
2.00	120
2.01	3
2.02	4
2.03	1
2.04	1
2.05	54
2.06	5
2.07	2
2.08	1
2.09	3
2.10	10
2.11	1
2.13	2
2.14	1
2.15	1
2.17	3
2.19	1
2.20	2
2.22	7
2.25	4
2.27	1
2.31	9
2.32	12
2.33	4
2.35	16
2.36	2
2.37	8
2.38	1
2.40	2
2.43	1
2.44	2
2.50	3