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test_fx.py
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"""MoviePy video and audio effects tests."""
import decimal
import math
import numbers
import os
import random
import numpy as np
import pytest
from moviepy import *
from moviepy.tools import convert_to_seconds
def test_accel_decel():
pass
def test_blackwhite():
# Create black/white spectrum ``bw_color_dict`` to compare against it.
# Colors after ``blackwhite`` FX must be inside this dictionary
# Note: black/white spectrum is made of colors with same numbers
# [(0, 0, 0), (1, 1, 1), (2, 2, 2)...]
bw_color_dict = {}
for num in range(0, 256):
bw_color_dict[chr(num + 255)] = (num, num, num)
color_dict = bw_color_dict.copy()
# update dictionary with default BitmapClip color_dict values
color_dict.update(BitmapClip.DEFAULT_COLOR_DICT)
# add row with random colors in b/w spectrum
random_row = ""
for num in range(512, 515):
# use unique unicode representation for each color
char = chr(num)
random_row += char
# random colors in the b/w spectrum
color_dict[char] = tuple(random.randint(0, 255) for i in range(3))
# clip converted below to black/white
clip = BitmapClip([["RGB", random_row]], color_dict=color_dict, fps=1)
# for each possible ``preserve_luminosity`` boolean argument value
for preserve_luminosity in [True, False]:
# default argument (``RGB=None``)
clip_bw = clip.with_effects(
[vfx.BlackAndWhite(preserve_luminosity=preserve_luminosity)]
)
bitmap = clip_bw.to_bitmap()
assert bitmap
for i, row in enumerate(bitmap[0]):
for char in row:
# all characters returned by ``to_bitmap`` are in the b/w spectrum
assert char in bw_color_dict
if i == 0: # pure "RGB" colors are converted to [85, 85, 85]
assert char == row[0] # so are equal
# custom random ``RGB`` argument
clip_bw_custom_rgb = clip.with_effects(
[
vfx.BlackAndWhite(
RGB=(random.randint(0, 255), 0, 0),
preserve_luminosity=preserve_luminosity,
)
]
)
bitmap = clip_bw_custom_rgb.to_bitmap()
for i, row in enumerate(bitmap[0]):
for i2, char in enumerate(row):
# all characters returned by ``to_bitmap`` are in the b/w spectrum
assert char in bw_color_dict
# for clip "RGB" row, two latest converted colors are equal
if i == 0 and i2 > 0:
assert char == row[1] and char == row[2]
# ``RGB="CRT_phosphor"`` argument
clip_bw_crt_phosphor = clip.with_effects(
[
vfx.BlackAndWhite(
RGB="CRT_phosphor", preserve_luminosity=preserve_luminosity
)
]
)
bitmap = clip_bw_crt_phosphor.to_bitmap()
assert bitmap
for row in bitmap[0]:
for char in row:
# all characters returned by ``to_bitmap`` are in the b/w spectrum
assert char in bw_color_dict
# This currently fails with a with_mask error!
# def test_blink(util):
# with VideoFileClip("media/big_buck_bunny_0_30.webm").subclip(0,10) as clip:
# clip1 = blink(clip, 1, 1)
# clip1.write_videofile(os.path.join(util.TMP_DIR,"blink1.webm"))
def test_multiply_color():
color_dict = {"H": (0, 0, 200), "L": (0, 0, 50), "B": (0, 0, 255), "O": (0, 0, 0)}
clip = BitmapClip([["LLO", "BLO"]], color_dict=color_dict, fps=1)
clipfx = clip.with_effects([vfx.MultiplyColor(4)])
target = BitmapClip([["HHO", "BHO"]], color_dict=color_dict, fps=1)
assert target == clipfx
def test_crop():
# x: 0 -> 4, y: 0 -> 3 inclusive
clip = BitmapClip([["ABCDE", "EDCBA", "CDEAB", "BAEDC"]], fps=1)
clip1 = clip.with_effects([vfx.Crop()])
target1 = BitmapClip([["ABCDE", "EDCBA", "CDEAB", "BAEDC"]], fps=1)
assert clip1 == target1
clip2 = clip.with_effects([vfx.Crop(x1=1, y1=1, x2=3, y2=3)])
target2 = BitmapClip([["DC", "DE"]], fps=1)
assert clip2 == target2
clip3 = clip.with_effects([vfx.Crop(y1=2)])
target3 = BitmapClip([["CDEAB", "BAEDC"]], fps=1)
assert clip3 == target3
clip4 = clip.with_effects([vfx.Crop(x1=2, width=2)])
target4 = BitmapClip([["CD", "CB", "EA", "ED"]], fps=1)
assert clip4 == target4
# TODO x_center=1 does not perform correctly
clip5 = clip.with_effects([vfx.Crop(x_center=2, y_center=2, width=3, height=3)])
target5 = BitmapClip([["ABC", "EDC", "CDE"]], fps=1)
assert clip5 == target5
clip6 = clip.with_effects([vfx.Crop(x_center=2, width=2, y1=1, y2=2)])
target6 = BitmapClip([["DC"]], fps=1)
assert clip6 == target6
def test_even_size():
clip1 = BitmapClip([["ABC", "BCD"]], fps=1) # Width odd
clip1even = clip1.with_effects([vfx.EvenSize()])
target1 = BitmapClip([["AB", "BC"]], fps=1)
assert clip1even == target1
clip2 = BitmapClip([["AB", "BC", "CD"]], fps=1) # Height odd
clip2even = clip2.with_effects([vfx.EvenSize()])
target2 = BitmapClip([["AB", "BC"]], fps=1)
assert clip2even == target2
clip3 = BitmapClip([["ABC", "BCD", "CDE"]], fps=1) # Width and height odd
clip3even = clip3.with_effects([vfx.EvenSize()])
target3 = BitmapClip([["AB", "BC"]], fps=1)
assert clip3even == target3
def test_fadein():
color_dict = {
"I": (0, 0, 0),
"R": (255, 0, 0),
"G": (0, 255, 0),
"B": (0, 0, 255),
"W": (255, 255, 255),
}
clip = BitmapClip([["R"], ["G"], ["B"]], color_dict=color_dict, fps=1)
clip1 = clip.with_effects([vfx.FadeIn(1)]) # default initial color
target1 = BitmapClip([["I"], ["G"], ["B"]], color_dict=color_dict, fps=1)
assert clip1 == target1
clip2 = clip.with_effects(
[vfx.FadeIn(1, initial_color=(255, 255, 255))]
) # different initial color
target2 = BitmapClip([["W"], ["G"], ["B"]], color_dict=color_dict, fps=1)
assert clip2 == target2
def test_fadeout(util, video):
clip = video(end_time=0.5)
clip1 = clip.with_effects([vfx.FadeOut(0.5)])
clip1.write_videofile(os.path.join(util.TMP_DIR, "fadeout1.webm"))
@pytest.mark.parametrize(
(
"t",
"freeze_duration",
"total_duration",
"padding_end",
"output_frames",
),
(
# at start, 1 second (default t == 0)
(
None,
1,
None,
None,
["R", "R", "G", "B"],
),
# at start, 1 second (explicit t)
(
0,
1,
None,
None,
["R", "R", "G", "B"],
),
# at end, 1 second
(
"end",
1,
None,
None,
["R", "G", "B", "B"],
),
# at end 1 second, padding end 1 second
(
"end",
1,
None,
1,
["R", "G", "G", "B"],
),
# at 2nd frame, 1 second
(
1, # second 0 is frame 1, second 1 is frame 2...
1,
None,
None,
["R", "G", "G", "B"],
),
# at 2nd frame, 2 seconds
(
1,
2,
None,
None,
["R", "G", "G", "G", "B"],
),
# `freeze_duration`, `total_duration` are None
(1, None, None, None, ValueError),
# `total_duration` 5 at start (2 seconds)
(None, None, 5, None, ["R", "R", "R", "G", "B"]),
# total duration 5 at end
("end", None, 5, None, ["R", "G", "B", "B", "B"]),
# total duration 5 padding end
("end", None, 5, 1, ["R", "G", "G", "G", "B"]),
),
ids=[
"at start, 1 second (default t == 0)",
"at start, 1 second (explicit t)",
"at end, 1 second",
"at end 1 second, padding end 1 second",
"at 2nd frame, 1 second",
"at 2nd frame, 2 seconds",
"`freeze_duration`, `total_duration` are None",
"`total_duration` 5 at start (2 seconds)",
"`total_duration` 5 at end",
"`total_duration` 5 padding end",
],
)
def test_freeze(t, freeze_duration, total_duration, padding_end, output_frames):
input_frames = ["R", "G", "B"]
clip_duration = len(input_frames)
# create BitmapClip with predefined set of colors, during 1 second each one
clip = BitmapClip([list(color) for color in input_frames], fps=1).with_duration(
clip_duration
)
# build kwargs passed to `freeze`
possible_kwargs = {
"t": t,
"freeze_duration": freeze_duration,
"total_duration": total_duration,
"padding_end": padding_end,
}
kwargs = {
kw_name: kw_value
for kw_name, kw_value in possible_kwargs.items()
if kw_value is not None
}
# freeze clip
if hasattr(output_frames, "__traceback__"):
with pytest.raises(output_frames):
clip.with_effects([vfx.Freeze(**kwargs)])
return
else:
freezed_clip = clip.with_effects([vfx.Freeze(**kwargs)])
# assert new duration
expected_freeze_duration = (
freeze_duration
if freeze_duration is not None
else total_duration - clip_duration
)
assert freezed_clip.duration == clip_duration + expected_freeze_duration
# assert colors are the expected
for i, color in enumerate(freezed_clip.iter_frames()):
expected_color = list(BitmapClip.DEFAULT_COLOR_DICT[output_frames[i]])
assert list(color[0][0]) == expected_color
def test_freeze_region():
clip = BitmapClip([["AAB", "CCC"], ["BBR", "DDD"], ["CCC", "ABC"]], fps=1)
# Test region
clip1 = clip.with_effects([vfx.FreezeRegion(t=1, region=(2, 0, 3, 1))])
target1 = BitmapClip([["AAR", "CCC"], ["BBR", "DDD"], ["CCR", "ABC"]], fps=1)
assert clip1 == target1
# Test outside_region
clip2 = clip.with_effects([vfx.FreezeRegion(t=1, outside_region=(2, 0, 3, 1))])
target2 = BitmapClip([["BBB", "DDD"], ["BBR", "DDD"], ["BBC", "DDD"]], fps=1)
assert clip2 == target2
def test_gamma_corr():
pass
def test_headblur():
pass
def test_invert_colors():
clip = BitmapClip(
[["AB", "BC"]],
color_dict={"A": (0, 0, 0), "B": (50, 100, 150), "C": (255, 255, 255)},
fps=1,
)
clip1 = clip.with_effects([vfx.InvertColors()])
target1 = BitmapClip(
[["CD", "DA"]],
color_dict={"A": (0, 0, 0), "D": (205, 155, 105), "C": (255, 255, 255)},
fps=1,
)
assert clip1 == target1
def test_loop(util, video):
clip = BitmapClip([["R"], ["G"], ["B"]], fps=1)
clip1 = clip.with_effects([vfx.Loop(n=2)]) # loop 2 times
target1 = BitmapClip([["R"], ["G"], ["B"], ["R"], ["G"], ["B"]], fps=1)
assert clip1 == target1
clip2 = clip.with_effects([vfx.Loop(duration=8)]) # loop 8 seconds
target2 = BitmapClip(
[["R"], ["G"], ["B"], ["R"], ["G"], ["B"], ["R"], ["G"]], fps=1
)
assert clip2 == target2
clip3 = clip.with_effects([vfx.Loop()]).with_duration(5) # infinite loop
target3 = BitmapClip([["R"], ["G"], ["B"], ["R"], ["G"]], fps=1)
assert clip3 == target3
clip = video(start_time=0.2, end_time=0.3) # 0.1 seconds long
clip1 = clip.with_effects([vfx.Loop()]).with_duration(0.5) # infinite looping
clip1.write_videofile(os.path.join(util.TMP_DIR, "loop1.webm"))
clip2 = clip.with_effects([vfx.Loop(duration=0.5)]) # loop for 1 second
clip2.write_videofile(os.path.join(util.TMP_DIR, "loop2.webm"))
clip3 = clip.with_effects([vfx.Loop(n=3)]) # loop 3 times
clip3.write_videofile(os.path.join(util.TMP_DIR, "loop3.webm"))
# Test audio looping
clip = AudioClip(
lambda t: np.sin(440 * 2 * np.pi * t) * (t % 1) + 0.5, duration=2.5, fps=44100
)
clip1 = clip.with_effects([vfx.Loop(2)])
# TODO fix AudioClip.__eq__()
# assert concatenate_audioclips([clip, clip]) == clip1
def test_lum_contrast(util, video):
clip = video()
clip1 = clip.with_effects([vfx.LumContrast()])
clip1.write_videofile(os.path.join(util.TMP_DIR, "lum_contrast1.webm"))
# what are the correct value ranges for function arguments lum,
# contrast and contrast_thr? Maybe we should check for these in
# lum_contrast.
def test_make_loopable(util, video):
clip = video()
clip1 = clip.with_effects([vfx.MakeLoopable(0.4)])
# We need to set libvpx-vp9 because our test will produce transparency
clip1.write_videofile(
os.path.join(util.TMP_DIR, "make_loopable1.webm"), codec="libvpx-vp9"
)
@pytest.mark.parametrize(
("ClipClass"),
(ColorClip, BitmapClip),
ids=("ColorClip", "BitmapClip"),
)
@pytest.mark.parametrize(
(
"margin_size",
"margins", # [left, right, top, bottom]
"color",
"expected_result",
),
(
pytest.param(
None,
None,
None,
[["RRR", "RRR"], ["RRR", "RRR"]],
id="default arguments",
),
pytest.param(
1,
None,
None,
[
["OOOOO", "ORRRO", "ORRRO", "OOOOO"],
["OOOOO", "ORRRO", "ORRRO", "OOOOO"],
],
id="margin_size=1,color=(0, 0, 0)",
),
pytest.param(
1,
None,
(0, 255, 0),
[
["GGGGG", "GRRRG", "GRRRG", "GGGGG"],
["GGGGG", "GRRRG", "GRRRG", "GGGGG"],
],
id="margin_size=1,color=(0, 255, 0)",
),
pytest.param(
None,
[1, 0, 0, 0],
(0, 255, 0),
[["GRRR", "GRRR"], ["GRRR", "GRRR"]],
id="left=1,color=(0, 255, 0)",
),
pytest.param(
None,
[0, 1, 0, 0],
(0, 255, 0),
[["RRRG", "RRRG"], ["RRRG", "RRRG"]],
id="right=1,color=(0, 255, 0)",
),
pytest.param(
None,
[1, 0, 1, 0],
(0, 255, 0),
[["GGGG", "GRRR", "GRRR"], ["GGGG", "GRRR", "GRRR"]],
id="left=1,top=1,color=(0, 255, 0)",
),
pytest.param(
None,
[0, 1, 1, 1],
(0, 255, 0),
[["GGGG", "RRRG", "RRRG", "GGGG"], ["GGGG", "RRRG", "RRRG", "GGGG"]],
id="right=1,top=1,bottom=1,color=(0, 255, 0)",
),
pytest.param(
None,
[3, 0, 0, 0],
(255, 255, 255),
[["WWWRRR", "WWWRRR"], ["WWWRRR", "WWWRRR"]],
id="left=3,color=(255, 255, 255)",
),
pytest.param(
None,
[0, 0, 0, 4],
(255, 255, 255),
[
["RRR", "RRR", "WWW", "WWW", "WWW", "WWW"],
["RRR", "RRR", "WWW", "WWW", "WWW", "WWW"],
],
id="bottom=4,color=(255, 255, 255)",
),
),
)
def test_margin(ClipClass, margin_size, margins, color, expected_result):
if ClipClass is BitmapClip:
clip = BitmapClip([["RRR", "RRR"], ["RRR", "RRR"]], fps=1)
else:
clip = ColorClip(color=(255, 0, 0), size=(3, 2), duration=2).with_fps(1)
# if None, set default argument values
if color is None:
color = (0, 0, 0)
if margins is None:
margins = [0, 0, 0, 0]
left, right, top, bottom = margins
new_clip = clip.with_effects(
[
vfx.Margin(
margin_size=margin_size,
left=left,
right=right,
top=top,
bottom=bottom,
color=color,
)
]
)
assert new_clip == BitmapClip(expected_result, fps=1)
@pytest.mark.parametrize("image_from", ("np.ndarray", "ImageClip"))
@pytest.mark.parametrize("duration", (None, "random"))
@pytest.mark.parametrize(
("color", "mask_color", "expected_color"),
(
(
(0, 0, 0),
(255, 255, 255),
(0, 0, 0),
),
(
(255, 0, 0),
(0, 0, 255),
(0, 0, 0),
),
(
(255, 255, 255),
(0, 10, 20),
(0, 10, 20),
),
(
(10, 10, 10),
(20, 0, 20),
(10, 0, 10),
),
),
)
def test_mask_and(image_from, duration, color, mask_color, expected_color):
"""Checks ``mask_and`` FX behaviour."""
clip_size = tuple(random.randint(3, 10) for i in range(2))
if duration == "random":
duration = round(random.uniform(0, 0.5), 2)
# test ImageClip and np.ndarray types as mask argument
clip = ColorClip(color=color, size=clip_size).with_duration(duration)
mask_clip = ColorClip(color=mask_color, size=clip.size)
masked_clip = clip.with_effects(
[
vfx.MasksAnd(
mask_clip if image_from == "ImageClip" else mask_clip.get_frame(0)
)
]
)
assert masked_clip.duration == clip.duration
assert np.array_equal(masked_clip.get_frame(0)[0][0], np.array(expected_color))
# test VideoClip as mask argument
color_frame, mask_color_frame = (np.array([[color]]), np.array([[mask_color]]))
clip = VideoClip(lambda t: color_frame).with_duration(duration)
mask_clip = VideoClip(lambda t: mask_color_frame).with_duration(duration)
masked_clip = clip.with_effects([vfx.MasksAnd(mask_clip)])
assert np.array_equal(masked_clip.get_frame(0)[0][0], np.array(expected_color))
def test_mask_color():
pass
@pytest.mark.parametrize("image_from", ("np.ndarray", "ImageClip"))
@pytest.mark.parametrize("duration", (None, "random"))
@pytest.mark.parametrize(
("color", "mask_color", "expected_color"),
(
(
(0, 0, 0),
(255, 255, 255),
(255, 255, 255),
),
(
(255, 0, 0),
(0, 0, 255),
(255, 0, 255),
),
(
(255, 255, 255),
(0, 10, 20),
(255, 255, 255),
),
(
(10, 10, 10),
(20, 0, 20),
(20, 10, 20),
),
),
)
def test_mask_or(image_from, duration, color, mask_color, expected_color):
"""Checks ``mask_or`` FX behaviour."""
clip_size = tuple(random.randint(3, 10) for i in range(2))
if duration == "random":
duration = round(random.uniform(0, 0.5), 2)
# test ImageClip and np.ndarray types as mask argument
clip = ColorClip(color=color, size=clip_size).with_duration(duration)
mask_clip = ColorClip(color=mask_color, size=clip.size)
masked_clip = clip.with_effects(
[
vfx.MasksOr(
mask_clip if image_from == "ImageClip" else mask_clip.get_frame(0)
)
]
)
assert masked_clip.duration == clip.duration
assert np.array_equal(masked_clip.get_frame(0)[0][0], np.array(expected_color))
# test VideoClip as mask argument
color_frame, mask_color_frame = (np.array([[color]]), np.array([[mask_color]]))
clip = VideoClip(lambda t: color_frame).with_duration(duration)
mask_clip = VideoClip(lambda t: mask_color_frame).with_duration(duration)
masked_clip = clip.with_effects([vfx.MasksOr(mask_clip)])
assert np.array_equal(masked_clip.get_frame(0)[0][0], np.array(expected_color))
def test_mirror_x():
clip = BitmapClip([["AB", "CD"]], fps=1)
clip1 = clip.with_effects([vfx.MirrorX()])
target = BitmapClip([["BA", "DC"]], fps=1)
assert clip1 == target
def test_mirror_y():
clip = BitmapClip([["AB", "CD"]], fps=1)
clip1 = clip.with_effects([vfx.MirrorY()])
target = BitmapClip([["CD", "AB"]], fps=1)
assert clip1 == target
def test_painting():
pass
@pytest.mark.parametrize("apply_to_mask", (True, False))
@pytest.mark.parametrize(
(
"size",
"duration",
"new_size",
"width",
"height",
),
(
(
[8, 2],
1,
[4, 1],
None,
None,
),
(
[8, 2],
1,
None,
4,
None,
),
(
[2, 8],
1,
None,
None,
4,
),
# neither 'new_size', 'height' or 'width'
(
[2, 2],
1,
None,
None,
None,
),
# `new_size` as scaling factor
(
[5, 5],
1,
2,
None,
None,
),
(
[5, 5],
1,
decimal.Decimal(2.5),
None,
None,
),
# arguments as functions
(
[2, 2],
4,
lambda t: {0: [4, 4], 1: [8, 8], 2: [11, 11], 3: [5, 8]}[t],
None,
None,
),
(
[2, 4],
2,
None,
None,
lambda t: {0: 3, 1: 4}[t],
),
(
[5, 2],
2,
None,
lambda t: {0: 3, 1: 4}[t],
None,
),
),
)
def test_resize(apply_to_mask, size, duration, new_size, height, width):
"""Checks ``resize`` FX behaviours using all argument"""
# build expected sizes (using `width` or `height` arguments will be proportional
# to original size)
if new_size:
if hasattr(new_size, "__call__"):
# function
expected_new_sizes = [new_size(t) for t in range(duration)]
elif isinstance(new_size, numbers.Number):
# scaling factor
expected_new_sizes = [[int(size[0] * new_size), int(size[1] * new_size)]]
else:
# tuple or list
expected_new_sizes = [new_size]
elif height:
if hasattr(height, "__call__"):
expected_new_sizes = []
for t in range(duration):
new_height = height(t)
expected_new_sizes.append(
[int(size[0] * new_height / size[1]), new_height]
)
else:
expected_new_sizes = [[size[0] * height / size[1], height]]
elif width:
if hasattr(width, "__call__"):
expected_new_sizes = []
for t in range(duration):
new_width = width(t)
expected_new_sizes.append(
[new_width, int(size[1] * new_width / size[0])]
)
else:
expected_new_sizes = [[width, size[1] * width / size[0]]]
else:
expected_new_sizes = None
clip = ColorClip(size=size, color=(0, 0, 0), duration=duration)
clip.fps = 1
mask = ColorClip(size=size, color=0, is_mask=True)
clip = clip.with_mask(mask)
# any resizing argument passed, raises `ValueError`
if expected_new_sizes is None:
with pytest.raises(ValueError):
resized_clip = clip.resized(
new_size=new_size,
height=height,
width=width,
apply_to_mask=apply_to_mask,
)
resized_clip = clip
expected_new_sizes = [size]
else:
resized_clip = clip.resized(
new_size=new_size, height=height, width=width, apply_to_mask=apply_to_mask
)
# assert new size for each frame
for t in range(duration):
expected_width = expected_new_sizes[t][0]
expected_height = expected_new_sizes[t][1]
clip_frame = resized_clip.get_frame(t)
assert len(clip_frame[0]) == expected_width
assert len(clip_frame) == expected_height
mask_frame = resized_clip.mask.get_frame(t)
if apply_to_mask:
assert len(mask_frame[0]) == expected_width
assert len(mask_frame) == expected_height
@pytest.mark.parametrize("unit", ["deg", "rad"])
@pytest.mark.parametrize("resample", ["bilinear", "nearest", "bicubic", "unknown"])
@pytest.mark.parametrize(
(
"angle",
"translate",
"center",
"bg_color",
"expected_frames",
),
(
(
0,
None,
None,
None,
[["AAAA", "BBBB", "CCCC"], ["ABCD", "BCDE", "CDEA"]],
),
(
90,
None,
None,
None,
[["ABC", "ABC", "ABC", "ABC"], ["DEA", "CDE", "BCD", "ABC"]],
),
(
lambda t: 90,
None,
None,
None,
[["ABC", "ABC", "ABC", "ABC"], ["DEA", "CDE", "BCD", "ABC"]],
),
(
180,
None,
None,
None,
[["CCCC", "BBBB", "AAAA"], ["AEDC", "EDCB", "DCBA"]],
),
(
270,
None,
None,
None,
[["CBA", "CBA", "CBA", "CBA"], ["CBA", "DCB", "EDC", "AED"]],
),
(
45,
(50, 50),
None,
(0, 255, 0),
[
["GGGGGG", "GGGGGG", "GGGGGG", "GGGGGG", "GGGGGG", "GGGGGG"],
["GGGGGG", "GGGGGG", "GGGGGG", "GGGGGG", "GGGGGG", "GGGGGG"],
],
),
(
45,
(50, 50),
(20, 20),
(255, 0, 0),
[
["RRRRRR", "RRRRRR", "RRRRRR", "RRRRRR", "RRRRRR"],
["RRRRRR", "RRRRRR", "RRRRRR", "RRRRRR", "RRRRRR"],
],
),
(
135,
(-100, -100),
None,
(0, 0, 255),
[
["BBBBBB", "BBBBBB", "BBBBBB", "BBBBBB", "BBBBBB"],
["BBBBBB", "BBBBBB", "BBBBBB", "BBBBBB", "BBBBBB"],
],
),
),
)
def test_rotate(
angle,
unit,
resample,
translate,
center,
bg_color,
expected_frames,
):
"""Check ``rotate`` FX behaviour against possible combinations of arguments."""
original_frames = [["AAAA", "BBBB", "CCCC"], ["ABCD", "BCDE", "CDEA"]]
# angles are defined in degrees, so convert to radians testing ``unit="rad"``
if unit == "rad":
if hasattr(angle, "__call__"):
_angle = lambda t: math.radians(angle(0))
else:
_angle = math.radians(angle)
else:
_angle = angle
clip = BitmapClip(original_frames, fps=1)
kwargs = {
"unit": unit,
"resample": resample,
"translate": translate,
"center": center,
"bg_color": bg_color,
}
if resample not in ["bilinear", "nearest", "bicubic"]:
with pytest.raises(ValueError) as exc:
clip.rotated(_angle, **kwargs)
assert (
"'resample' argument must be either 'bilinear', 'nearest' or 'bicubic'"
) == str(exc.value)
return
# resolve the angle, because if it is a multiple of 90, the rotation
# can be computed event without an available PIL installation
if hasattr(_angle, "__call__"):
_resolved_angle = _angle(0)
else:
_resolved_angle = _angle
if unit == "rad":
_resolved_angle = math.degrees(_resolved_angle)
rotated_clip = clip.with_effects([vfx.Rotate(_angle, **kwargs)])
expected_clip = BitmapClip(expected_frames, fps=1)
assert rotated_clip.to_bitmap() == expected_clip.to_bitmap()
def test_rotate_nonstandard_angles(util):
# Test rotate with color clip
clip = ColorClip([600, 400], [150, 250, 100]).with_duration(1).with_fps(5)
clip = clip.with_effects([vfx.Rotate(20)])
clip.write_videofile(os.path.join(util.TMP_DIR, "color_rotate.webm"))
def test_rotate_mask():
# Prior to /~https://github.com/Zulko/moviepy/pull/1399
# all the pixels of the resulting video were 0
clip = (
ColorClip(color=0.5, size=(1, 1), is_mask=True)
.with_fps(1)
.with_duration(1)
.with_effects([vfx.Rotate(45)])
)
assert clip.get_frame(0)[1][1] != 0
@pytest.mark.parametrize(
("unsupported_kwargs",),
(
(["bg_color"],),
(["center"],),
(["translate"],),
(["translate", "center"],),
(["center", "bg_color", "translate"],),
),
ids=(
"bg_color",
"center",
"translate",
"translate,center",
"center,bg_color,translate",
),
)
def test_rotate_supported_PIL_kwargs(
unsupported_kwargs,
monkeypatch,
):
"""Test supported 'rotate' FX arguments by PIL version."""
pass
def test_scroll():
pass
def test_multiply_speed():
clip = BitmapClip([["A"], ["B"], ["C"], ["D"]], fps=1)
clip1 = clip.with_effects([vfx.MultiplySpeed(0.5)]) # 1/2x speed
target1 = BitmapClip(
[["A"], ["A"], ["B"], ["B"], ["C"], ["C"], ["D"], ["D"]], fps=1
)
assert clip1 == target1
clip2 = clip.with_effects([vfx.MultiplySpeed(final_duration=8)]) # 1/2x speed
target2 = BitmapClip(
[["A"], ["A"], ["B"], ["B"], ["C"], ["C"], ["D"], ["D"]], fps=1