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This WebVTT acid test will verify rendering and parsing compatibility with the WebVTT standard.
Test 1: Unicode Support
ÀÁÂÃĀĂȦÄẢÅǍȀȂĄẠḀẦẤẪẨẰẮẴẲǠǞǺẬẶÆǼǢ
East Asian Characters: だらり帯の結び方
Test 2: WebVTT Timestamp Support
This text should appear word by word with second intervals.
This text should appear with tenth of a second intervals.
This text should appear with 100th of a second intervals.
This text should appear with 1000th of a second intervals.
Test 3: WebVTT Formatting spans
This text should be bold This text should be italic This text should be underlined
Test 4: WebVTT Ruby spans
私(わたし)たち
Test 4: Ignoring malformed cues
Test 5: Cue alignment
This cue should be aligned to the middle position.
Test 5.5: Cue alignment with BIDI/RTL text
محاذاة النص الأوسط (middle)
Test 6: Line position (percentage)
Line position: 1%
Line position: 4%
Line position: 5%
Line position: 8%
Line position: 9%
Line position: 12%
Line position: 13%
Line position: 16%
Line position: 17%
Line position: 20%
Line position: 21%
Line position: 24%
Line position: 25%
Line position: 28%
Line position: 29%
Line position: 32%
Line position: 33%
Line position: 36%
Line position: 37%
Line position: 40%
Line position: 41%
Line position: 44%
Line position: 45%
Line position: 48%
Line position: 49%
Line position: 52%
Line position: 53%
Line position: 56%
Line position: 57%
Line position: 60%
Line position: 61%
Line position: 64%
Line position: 65%
Line position: 68%
Line position: 69%
Line position: 72%
Line position: 73%
Line position: 76%
Line position: 77%
Line position: 80%
Line position: 81%
Line position: 84%
Line position: 85%
Line position: 88%
Line position: 89%
Line position: 92%
Line position: 93%
Line position: 96%
Line position: 97%
Line position: 100%
Test 7: Cue size (percentage)
Size: 1%
Size: 2%
Size: 3%
Size: 4%
Size: 5%
Size: 6%
Size: 7%
Size: 8%
Size: 9%
Size: 10%
Size: 11%
Size: 12%
Size: 13%
Size: 14%
Size: 15%
Size: 16%
Size: 17%
Size: 18%
Size: 19%
Size: 20%
Size: 21%
Size: 22%
Size: 23%
Size: 24%
Size: 25%
Size: 26%
Size: 27%
Size: 28%
Size: 29%
Size: 30%
Size: 31%
Size: 32%
Size: 33%
Size: 34%
Size: 35%
Size: 36%
Size: 37%
Size: 38%
Size: 39%
Size: 40%
Size: 41%
Size: 42%
Size: 43%
Size: 44%
Size: 45%
Size: 46%
Size: 47%
Size: 48%
Size: 49%
Size: 51%
Size: 52%
Size: 53%
Size: 54%
Size: 55%
Size: 56%
Size: 57%
Size: 58%
Size: 59%
Size: 60%
Size: 61%
Size: 62%
Size: 63%
Size: 64%
Size: 65%
Size: 66%
Size: 67%
Size: 68%
Size: 69%
Size: 70%
Size: 71%
Size: 72%
Size: 73%
Size: 74%
Size: 75%
Size: 76%
Size: 77%
Size: 78%
Size: 79%
Size: 80%
Size: 81%
Size: 82%
Size: 83%
Size: 84%
Size: 85%
Size: 86%
Size: 87%
Size: 88%
Size: 89%
Size: 90%
Size: 91%
Size: 92%
Size: 93%
Size: 94%
Size: 95%
Size: 96%
Size: 97%
Size: 98%
Size: 99%
Size: 100%
Test 8: Text position (percentage)
Text Position: 1%
Text Position: 2%
Text Position: 3%
Text Position: 4%
Text Position: 6%
Text Position: 7%
Text Position: 8%
Text Position: 9%
Text Position: 10%
Text Position: 11%
Text Position: 12%
Text Position: 13%
Text Position: 14%
Text Position: 15%
Text Position: 16%
Text Position: 17%
Text Position: 18%
Text Position: 19%
Text Position: 20%
Text Position: 21%
Text Position: 22%
Text Position: 23%
Text Position: 24%
Text Position: 25%
Text Position: 26%
Text Position: 27%
Text Position: 28%
Text Position: 29%
Text Position: 30%
Text Position: 31%
Text Position: 32%
Text Position: 33%
Text Position: 34%
Text Position: 35%
Text Position: 36%
Text Position: 37%
Text Position: 38%
Text Position: 39%
Text Position: 40%
Text Position: 41%
Text Position: 42%
Text Position: 43%
Text Position: 44%
Text Position: 45%
Text Position: 46%
Text Position: 47%
Text Position: 48%
Text Position: 49%
Text Position: 50%
Text Position: 51%
Text Position: 52%
Text Position: 53%
Text Position: 54%
Text Position: 55%
Text Position: 56%
Text Position: 57%
Text Position: 58%
Text Position: 59%
Text Position: 60%
Text Position: 61%
Text Position: 62%
Text Position: 63%
Text Position: 64%
Text Position: 65%
Text Position: 66%
Text Position: 67%
Text Position: 68%
Text Position: 69%
Text Position: 70%
Text Position: 71%
Text Position: 72%
Text Position: 73%
Text Position: 74%
Text Position: 75%
Text Position: 76%
Text Position: 77%
Text Position: 78%
Text Position: 79%
Text Position: 80%
Text Position: 81%
Text Position: 82%
Text Position: 83%
Text Position: 84%
Text Position: 85%
Text Position: 86%
Text Position: 87%
Text Position: 88%
Text Position: 89%
Text Position: 90%
Text Position: 91%
Text Position: 92%
Text Position: 93%
Text Position: 94%
Text Position: 95%
Text Position: 96%
Text Position: 97%
Text Position: 98%
Text Position: 99%
Text Position: 100%
Test 9: Text position, size, and line position
1%
2%
3%
4%
5%
6%
7%
8%
9%
10%
11%
12%
13%
14%
15%
16%
17%
18%
19%
20%
21%
22%
23%
24%
25%
26%
27%
28%
29%
30%
31%
32%
33%
34%
35%
36%
37%
38%
39%
40%
41%
42%
43%
44%
45%
46%
47%
48%
49%
50%
51%
52%
53%
54%
55%
56%
57%
58%
59%
60%
61%
62%
63%
64%
65%
66%
67%
68%
69%
70%
71%
72%
73%
74%
75%
76%
77%
78%
79%
80%
81%
82%
83%
84%
85%
86%
87%
88%
89%
90%
91%
92%
93%
94%
95%
96%
97%
98%
99%
100%
Test 10: Vertical and Vertical-LR cue direction
Vertical-LR Cue 一二三四五六七八九十
Test 11: Vertical cue direction text alignment
A:Start 一二三四五六七八九十
A:Middle 一二三四五六七八九十
Alignment:End 一二三四五六七八九十
Test 12: Vertical-LR cue direction text alignment
A:Start 一二三四五六七八九十
A:Middle 一二三四五六七八九十
Alignment:End 一二三四五六七八九十
Test 13: Vertical cue line position
LPos:1%
LPos:2%
LPos:3%
LPos:4%
LPos:5%
LPos:6%
LPos:7%
LPos:8%
LPos:9%
LPos:10%
LPos:11%
LPos:12%
LPos:13%
LPos:14%
LPos:15%
LPos:16%
LPos:17%
LPos:18%
LPos:19%
LPos:20%
LPos:21%
LPos:22%
LPos:23%
LPos:24%
LPos:25%
LPos:26%
LPos:27%
LPos:28%
LPos:29%
LPos:30%
LPos:31%
LPos:32%
LPos:33%
LPos:34%
LPos:35%
LPos:36%
LPos:37%
LPos:38%
LPos:39%
LPos:40%
LPos:41%
LPos:42%
LPos:43%
LPos:44%
LPos:45%
LPos:46%
LPos:47%
LPos:48%
LPos:49%
LPos:50%
LPos:51%
LPos:52%
LPos:53%
LPos:54%
LPos:55%
LPos:56%
LPos:57%
LPos:58%
LPos:59%
LPos:60%
LPos:61%
LPos:62%
LPos:63%
LPos:64%
LPos:65%
LPos:66%
LPos:67%
LPos:68%
LPos:69%
LPos:70%
LPos:71%
LPos:72%
LPos:73%
LPos:74%
LPos:75%
LPos:76%
LPos:77%
LPos:78%
LPos:79%
LPos:80%
LPos:81%
LPos:82%
LPos:83%
LPos:84%
LPos:85%
LPos:86%
LPos:87%
LPos:88%
LPos:89%
LPos:90%
LPos:91%
LPos:92%
LPos:93%
LPos:94%
LPos:95%
LPos:96%
LPos:97%
LPos:98%
LPos:99%
LPos:100%
Test 14: Vertical-LR cue line position
LPos:1%
LPos:2%
LPos:4%
LPos:5%
LPos:6%
LPos:7%
LPos:8%
LPos:9%
LPos:10%
LPos:11%
LPos:12%
LPos:13%
LPos:14%
LPos:15%
LPos:16%
LPos:17%
LPos:18%
LPos:19%
LPos:20%
LPos:21%
LPos:22%
LPos:23%
LPos:24%
LPos:25%
LPos:26%
LPos:27%
LPos:28%
LPos:29%
LPos:30%
LPos:31%
LPos:32%
LPos:33%
LPos:34%
LPos:35%
LPos:36%
LPos:37%
LPos:38%
LPos:39%
LPos:40%
LPos:41%
LPos:42%
LPos:43%
LPos:44%
LPos:45%
LPos:46%
LPos:47%
LPos:48%
LPos:49%
LPos:50%
LPos:51%
LPos:52%
LPos:53%
LPos:54%
LPos:55%
LPos:56%
LPos:57%
LPos:58%
LPos:59%
LPos:60%
LPos:61%
LPos:62%
LPos:63%
LPos:64%
LPos:65%
LPos:66%
LPos:67%
LPos:68%
LPos:69%
LPos:70%
LPos:71%
LPos:72%
LPos:73%
LPos:74%
LPos:75%
LPos:76%
LPos:77%
LPos:78%
LPos:79%
LPos:80%
LPos:81%
LPos:82%
LPos:83%
LPos:84%
LPos:85%
LPos:86%
LPos:87%
LPos:88%
LPos:89%
LPos:90%
LPos:91%
LPos:92%
LPos:93%
LPos:94%
LPos:95%
LPos:96%
LPos:97%
LPos:98%
LPos:99%
LPos:100%
Test 15: Vertical cue size
S:1%
S:2%
S:3%
S:4%
S:5%
S:6%
S:7%
S:8%
S:9%
S:10%
S:11%
S:12%
S:13%
S:14%
S:15%
S:16%
S:17%
S:18%
S:19%
S:20%
S:21%
S:22%
S:23%
S:24%
S:25%
S:26%
S:27%
S:28%
S:29%
S:30%
S:31%
S:32%
S:33%
S:34%
S:35%
S:36%
S:37%
S:38%
S:39%
S:40%
S:41%
S:42%
S:43%
S:44%
S:45%
S:46%
S:47%
S:48%
S:49%
S:50%
S:51%
S:52%
S:53%
S:54%
S:55%
S:56%
S:57%
S:58%
S:59%
S:60%
S:61%
S:62%
S:63%
S:64%
S:65%
S:66%
S:67%
S:68%
S:69%
S:70%
S:71%
S:72%
S:73%
S:74%
S:75%
S:76%
S:77%
S:78%
S:79%
S:80%
S:81%
S:82%
S:83%
S:84%
S:85%
S:86%
S:87%
S:88%
S:89%
S:90%
S:91%
S:92%
S:93%
S:94%
S:95%
S:96%
S:97%
S:98%
S:99%
S:100%
Test 15: Vertical-LR cue size
S:1%
S:2%
S:3%
S:4%
S:5%
S:6%
S:7%
S:8%
S:9%
S:10%
S:11%
S:12%
S:13%
S:14%
S:15%
S:16%
S:17%
S:18%
S:19%
S:20%
S:21%
S:22%
S:23%
S:24%
S:25%
S:26%
S:27%
S:28%
S:29%
S:30%
S:31%
S:32%
S:33%
S:34%
S:35%
S:36%
S:37%
S:38%
S:39%
S:40%
S:41%
S:42%
S:43%
S:44%
S:45%
S:46%
S:47%
S:48%
S:49%
S:51%
S:52%
S:53%
S:54%
S:55%
S:56%
S:57%
S:58%
S:59%
S:60%
S:61%
S:62%
S:63%
S:64%
S:65%
S:66%
S:67%
S:68%
S:69%
S:70%
S:71%
S:72%
S:73%
S:74%
S:75%
S:76%
S:77%
S:78%
S:79%
S:80%
S:81%
S:82%
S:83%
S:84%
S:85%
S:86%
S:87%
S:88%
S:89%
S:90%
S:91%
S:92%
S:93%
S:94%
S:95%
S:96%
S:97%
S:98%
S:99%
S:100%
Test 16: Vertical text position
T:1%
T:2%
T:3%
T:4%
T:5%
T:6%
T:7%
T:8%
T:9%
T:10%
T:11%
T:12%
T:13%
T:14%
T:15%
T:16%
T:17%
T:18%
T:19%
T:20%
T:21%
T:22%
T:23%
T:24%
T:25%
T:26%
T:27%
T:28%
T:29%
T:30%
T:31%
T:32%
T:33%
T:34%
T:35%
T:36%
T:37%
T:38%
T:39%
T:40%
T:41%
T:42%
T:43%
T:44%
T:45%
T:46%
T:47%
T:48%
T:49%
T:50%
T:51%
T:52%
T:53%
T:54%
T:55%
T:56%
T:57%
T:58%
T:59%
T:60%
T:61%
T:62%
T:63%
T:64%
T:65%
T:66%
T:67%
T:68%
T:69%
T:70%
T:71%
T:72%
T:73%
T:74%
T:75%
T:76%
T:77%
T:78%
T:79%
T:80%
T:81%
T:82%
T:83%
T:84%
T:85%
T:86%
T:87%
T:88%
T:89%
T:90%
T:91%
T:92%
T:93%
T:94%
T:95%
T:96%
T:97%
T:98%
T:99%
T:100%
Test 17: Vertical-LR text position
T:1%
T:2%
T:3%
T:4%
T:5%
T:6%
T:7%
T:8%
T:9%
T:10%
T:11%
T:12%
T:13%
T:14%
T:15%
T:16%
T:17%
T:18%
T:19%
T:20%
T:21%
T:22%
T:23%
T:24%
T:25%
T:26%
T:27%
T:28%
T:29%
T:30%
T:31%
T:32%
T:33%
T:34%
T:35%
T:36%
T:37%
T:38%
T:39%
T:40%
T:41%
T:42%
T:43%
T:44%
T:45%
T:46%
T:47%
T:48%
T:49%
T:50%
T:51%
T:52%
T:53%
T:54%
T:55%
T:56%
T:57%
T:58%
T:59%
T:60%
T:61%
T:62%
T:63%
T:64%
T:65%
T:66%
T:67%
T:68%
T:69%
T:70%
T:71%
T:72%
T:73%
T:74%
T:75%
T:76%
T:77%
T:78%
T:79%
T:80%
T:81%
T:82%
T:83%
T:84%
T:85%
T:86%
T:87%
T:88%
T:89%
T:90%
T:91%
T:92%
T:93%
T:94%
T:95%
T:96%
T:97%
T:98%
T:99%
T:100%
Test 18: Combined Ultimate Test!
1%
2%
3%
4%
5%
6%
7%
9%
11%
12%
13%
14%
15%
16%
17%
18%
19%
20%
21%
22%
23%
24%
25%
26%
27%
28%
29%
30%
31%
32%
33%
34%
35%
36%
37%
38%
39%
40%
41%
42%
43%
44%
45%
46%
48%
49%
50%
51%
52%
53%
54%
55%
56%
57%
58%
59%
60%
61%
62%
63%
64%
65%
66%
67%
68%
69%
70%
71%
72%
73%
74%
75%
76%
77%
78%
79%
80%
81%
82%
83%
84%
85%
86%
87%
88%
89%
90%
91%
92%
93%
94%
95%
96%
97%
98%
99%
100%