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
|
INSERT OR REPLACE INTO videos (id, width, height, fps) VALUES ('wavey', 400, 400, 10) RETURNING id;
WITH RECURSIVE
video AS (SELECT * FROM videos WHERE id = 'wavey'),
_frames(frame) AS (
SELECT 1 UNION ALL
SELECT frame + 1 FROM _frames, video WHERE frame < 50
)
INSERT INTO images (id, width, height, frame, video_id) SELECT CONCAT('wavey/', frame), width, height, frame, 'wavey' FROM _frames, video;
WITH RECURSIVE
video AS (SELECT * FROM videos WHERE id = 'wavey'),
horizontal(x) AS (SELECT width FROM video UNION ALL SELECT x - 1 FROM horizontal WHERE x > 1),
vertical(y) AS (SELECT height FROM video UNION ALL SELECT y - 1 FROM vertical WHERE y > 1),
_frames(id, frame) AS (SELECT id, frame FROM images WHERE video_id = (SELECT id FROM video)),
_pixels(frame_id, x, y, r, g, b) AS
(SELECT
frames_id,
x, y,
ROUND(100 * value),
ROUND(240 * value*value),
ROUND(255 * value)
FROM (SELECT *,
(CASE
WHEN SIN((x - 4.0*frame) / 20.0)*10.0 > y - 150 THEN 1.0
WHEN SIN((x - 0.5*frame) / 20.0)*10.0 > y - 200 THEN 0.75
WHEN SIN((x + 8.0*frame) / 20.0)*10.0 > y - 280 THEN 0.5
ELSE 0.3
END) AS value,
_frames.id AS frames_id
FROM vertical, horizontal, _frames)
)
INSERT INTO pixels (image_id, x, y, r, g, b) SELECT frame_id, x, y, r, g, b FROM _pixels;
|
