ffmpeg-python/ffmpeg/tests/test_ffmpeg.py at master · kkroening/ffmpeg-python · GitHub

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from __future__ import unicode_literals

from builtins import bytes

from builtins import range

from builtins import str

import ffmpeg

import os

import pytest

import random

import re

import subprocess

import sys

try:

import mock # python 2

except ImportError:

from unittest import mock # python 3

TEST_DIR = os.path.dirname(__file__)

SAMPLE_DATA_DIR = os.path.join(TEST_DIR, 'sample_data')

TEST_INPUT_FILE1 = os.path.join(SAMPLE_DATA_DIR, 'in1.mp4')

TEST_OVERLAY_FILE = os.path.join(SAMPLE_DATA_DIR, 'overlay.png')

TEST_OUTPUT_FILE1 = os.path.join(SAMPLE_DATA_DIR, 'out1.mp4')

TEST_OUTPUT_FILE2 = os.path.join(SAMPLE_DATA_DIR, 'out2.mp4')

BOGUS_INPUT_FILE = os.path.join(SAMPLE_DATA_DIR, 'bogus')

subprocess.check_call(['ffmpeg', '-version'])

def test_escape_chars():

assert ffmpeg._utils.escape_chars('a:b', ':') == r'a\:b'

assert ffmpeg._utils.escape_chars('a\\:b', ':\\') == 'a\\\\\\:b'

assert (

ffmpeg._utils.escape_chars('a:b,c[d]e%{}f\'g\'h\\i', '\\\':,[]%')

== 'a\\:b\\,c\\[d\\]e\\%{}f\\\'g\\\'h\\\\i'

)

assert ffmpeg._utils.escape_chars(123, ':\\') == '123'

def test_fluent_equality():

base1 = ffmpeg.input('dummy1.mp4')

base2 = ffmpeg.input('dummy1.mp4')

base3 = ffmpeg.input('dummy2.mp4')

t1 = base1.trim(start_frame=10, end_frame=20)

t2 = base1.trim(start_frame=10, end_frame=20)

t3 = base1.trim(start_frame=10, end_frame=30)

t4 = base2.trim(start_frame=10, end_frame=20)

t5 = base3.trim(start_frame=10, end_frame=20)

assert t1 == t2

assert t1 != t3

assert t1 == t4

assert t1 != t5

def test_fluent_concat():

base = ffmpeg.input('dummy.mp4')

trimmed1 = base.trim(start_frame=10, end_frame=20)

trimmed2 = base.trim(start_frame=30, end_frame=40)

trimmed3 = base.trim(start_frame=50, end_frame=60)

concat1 = ffmpeg.concat(trimmed1, trimmed2, trimmed3)

concat2 = ffmpeg.concat(trimmed1, trimmed2, trimmed3)

concat3 = ffmpeg.concat(trimmed1, trimmed3, trimmed2)

assert concat1 == concat2

assert concat1 != concat3

def test_fluent_output():

ffmpeg.input('dummy.mp4').trim(start_frame=10, end_frame=20).output('dummy2.mp4')

def test_fluent_complex_filter():

in_file = ffmpeg.input('dummy.mp4')

return ffmpeg.concat(

in_file.trim(start_frame=10, end_frame=20),

in_file.trim(start_frame=30, end_frame=40),

in_file.trim(start_frame=50, end_frame=60),

).output('dummy2.mp4')

def test_node_repr():

in_file = ffmpeg.input('dummy.mp4')

trim1 = ffmpeg.trim(in_file, start_frame=10, end_frame=20)

trim2 = ffmpeg.trim(in_file, start_frame=30, end_frame=40)

trim3 = ffmpeg.trim(in_file, start_frame=50, end_frame=60)

concatted = ffmpeg.concat(trim1, trim2, trim3)

output = ffmpeg.output(concatted, 'dummy2.mp4')

assert repr(in_file.node) == 'input(filename={!r}) <{}>'.format(

'dummy.mp4', in_file.node.short_hash

)

assert repr(trim1.node) == 'trim(end_frame=20, start_frame=10) <{}>'.format(

trim1.node.short_hash

)

assert repr(trim2.node) == 'trim(end_frame=40, start_frame=30) <{}>'.format(

trim2.node.short_hash

)

assert repr(trim3.node) == 'trim(end_frame=60, start_frame=50) <{}>'.format(

trim3.node.short_hash

)

assert repr(concatted.node) == 'concat(n=3) <{}>'.format(concatted.node.short_hash)

assert repr(output.node) == 'output(filename={!r}) <{}>'.format(

'dummy2.mp4', output.node.short_hash

)

def test_stream_repr():

in_file = ffmpeg.input('dummy.mp4')

assert repr(in_file) == 'input(filename={!r})[None] <{}>'.format(

'dummy.mp4', in_file.node.short_hash

)

split0 = in_file.filter_multi_output('split')[0]

assert repr(split0) == 'split()[0] <{}>'.format(split0.node.short_hash)

dummy_out = in_file.filter_multi_output('dummy')['out']

assert repr(dummy_out) == 'dummy()[{!r}] <{}>'.format(

dummy_out.label, dummy_out.node.short_hash

)

def test_repeated_args():

out_file = ffmpeg.input('dummy.mp4').output(

'dummy2.mp4', streamid=['0:0x101', '1:0x102']

)

assert out_file.get_args() == [

'-i',

'dummy.mp4',

'-streamid',

'0:0x101',

'-streamid',

'1:0x102',

'dummy2.mp4',

]

def test__get_args__simple():

out_file = ffmpeg.input('dummy.mp4').output('dummy2.mp4')

assert out_file.get_args() == ['-i', 'dummy.mp4', 'dummy2.mp4']

def test_global_args():

out_file = (

ffmpeg.input('dummy.mp4')

.output('dummy2.mp4')

.global_args('-progress', 'someurl')

)

assert out_file.get_args() == [

'-i',

'dummy.mp4',

'dummy2.mp4',

'-progress',

'someurl',

]

def _get_simple_example():

return ffmpeg.input(TEST_INPUT_FILE1).output(TEST_OUTPUT_FILE1)

def _get_complex_filter_example():

split = ffmpeg.input(TEST_INPUT_FILE1).vflip().split()

split0 = split[0]

split1 = split[1]

overlay_file = ffmpeg.input(TEST_OVERLAY_FILE)

overlay_file = ffmpeg.crop(overlay_file, 10, 10, 158, 112)

return (

ffmpeg.concat(

split0.trim(start_frame=10, end_frame=20),

split1.trim(start_frame=30, end_frame=40),

)

.overlay(overlay_file.hflip())

.drawbox(50, 50, 120, 120, color='red', thickness=5)

.output(TEST_OUTPUT_FILE1)

.overwrite_output()

)

def test__get_args__complex_filter():

out = _get_complex_filter_example()

args = ffmpeg.get_args(out)

assert args == [

'-i',

TEST_INPUT_FILE1,

'-i',

TEST_OVERLAY_FILE,

'-filter_complex',

'[0]vflip[s0];'

'[s0]split=2[s1][s2];'

'[s1]trim=end_frame=20:start_frame=10[s3];'

'[s2]trim=end_frame=40:start_frame=30[s4];'

'[s3][s4]concat=n=2[s5];'

'[1]crop=158:112:10:10[s6];'

'[s6]hflip[s7];'

'[s5][s7]overlay=eof_action=repeat[s8];'

'[s8]drawbox=50:50:120:120:red:t=5[s9]',

'-map',

'[s9]',

TEST_OUTPUT_FILE1,

'-y',

]

def test_combined_output():

i1 = ffmpeg.input(TEST_INPUT_FILE1)

i2 = ffmpeg.input(TEST_OVERLAY_FILE)

out = ffmpeg.output(i1, i2, TEST_OUTPUT_FILE1)

assert out.get_args() == [

'-i',

TEST_INPUT_FILE1,

'-i',

TEST_OVERLAY_FILE,

'-map',

'0',

'-map',

'1',

TEST_OUTPUT_FILE1,

]

@pytest.mark.parametrize('use_shorthand', [True, False])

def test_filter_with_selector(use_shorthand):

i = ffmpeg.input(TEST_INPUT_FILE1)

if use_shorthand:

v1 = i.video.hflip()

a1 = i.audio.filter('aecho', 0.8, 0.9, 1000, 0.3)

else:

v1 = i['v'].hflip()

a1 = i['a'].filter('aecho', 0.8, 0.9, 1000, 0.3)

out = ffmpeg.output(a1, v1, TEST_OUTPUT_FILE1)

assert out.get_args() == [

'-i',

TEST_INPUT_FILE1,

'-filter_complex',

'[0:a]aecho=0.8:0.9:1000:0.3[s0];' '[0:v]hflip[s1]',

'-map',

'[s0]',

'-map',

'[s1]',

TEST_OUTPUT_FILE1,

]

def test_get_item_with_bad_selectors():

input = ffmpeg.input(TEST_INPUT_FILE1)

with pytest.raises(ValueError) as excinfo:

input['a']['a']

assert str(excinfo.value).startswith('Stream already has a selector:')

with pytest.raises(TypeError) as excinfo:

input[:'a']

assert str(excinfo.value).startswith("Expected string index (e.g. 'a')")

with pytest.raises(TypeError) as excinfo:

input[5]

assert str(excinfo.value).startswith("Expected string index (e.g. 'a')")

def _get_complex_filter_asplit_example():

split = ffmpeg.input(TEST_INPUT_FILE1).vflip().asplit()

split0 = split[0]

split1 = split[1]

return (

ffmpeg.concat(

split0.filter('atrim', start=10, end=20),

split1.filter('atrim', start=30, end=40),

)

.output(TEST_OUTPUT_FILE1)

.overwrite_output()

)

def test_filter_concat__video_only():

in1 = ffmpeg.input('in1.mp4')

in2 = ffmpeg.input('in2.mp4')

args = ffmpeg.concat(in1, in2).output('out.mp4').get_args()

assert args == [

'-i',

'in1.mp4',

'-i',

'in2.mp4',

'-filter_complex',

'[0][1]concat=n=2[s0]',

'-map',

'[s0]',

'out.mp4',

]

def test_filter_concat__audio_only():

in1 = ffmpeg.input('in1.mp4')

in2 = ffmpeg.input('in2.mp4')

args = ffmpeg.concat(in1, in2, v=0, a=1).output('out.mp4').get_args()

assert args == [

'-i',

'in1.mp4',

'-i',

'in2.mp4',

'-filter_complex',

'[0][1]concat=a=1:n=2:v=0[s0]',

'-map',

'[s0]',

'out.mp4',

]

def test_filter_concat__audio_video():

in1 = ffmpeg.input('in1.mp4')

in2 = ffmpeg.input('in2.mp4')

joined = ffmpeg.concat(in1.video, in1.audio, in2.hflip(), in2['a'], v=1, a=1).node

args = ffmpeg.output(joined[0], joined[1], 'out.mp4').get_args()

assert args == [

'-i',

'in1.mp4',

'-i',

'in2.mp4',

'-filter_complex',

'[1]hflip[s0];[0:v][0:a][s0][1:a]concat=a=1:n=2:v=1[s1][s2]',

'-map',

'[s1]',

'-map',

'[s2]',

'out.mp4',

]

def test_filter_concat__wrong_stream_count():

in1 = ffmpeg.input('in1.mp4')

in2 = ffmpeg.input('in2.mp4')

with pytest.raises(ValueError) as excinfo:

ffmpeg.concat(in1.video, in1.audio, in2.hflip(), v=1, a=1).node

assert (

str(excinfo.value)

== 'Expected concat input streams to have length multiple of 2 (v=1, a=1); got 3'

)

def test_filter_asplit():

out = _get_complex_filter_asplit_example()

args = out.get_args()

assert args == [

'-i',

TEST_INPUT_FILE1,

'-filter_complex',

(

'[0]vflip[s0];'

'[s0]asplit=2[s1][s2];'

'[s1]atrim=end=20:start=10[s3];'

'[s2]atrim=end=40:start=30[s4];'

'[s3][s4]concat=n=2[s5]'

'-map',

'[s5]',

TEST_OUTPUT_FILE1,

'-y',

]

def test__output__bitrate():

args = (

ffmpeg.input('in')

.output('out', video_bitrate=1000, audio_bitrate=200)

.get_args()

)

assert args == ['-i', 'in', '-b:v', '1000', '-b:a', '200', 'out']

@pytest.mark.parametrize('video_size', [(320, 240), '320x240'])

def test__output__video_size(video_size):

args = ffmpeg.input('in').output('out', video_size=video_size).get_args()

assert args == ['-i', 'in', '-video_size', '320x240', 'out']

def test_filter_normal_arg_escape():

"""Test string escaping of normal filter args (e.g. ``font`` param of ``drawtext``

filter).

"""

def _get_drawtext_font_repr(font):

"""Build a command-line arg using drawtext ``font`` param and extract the

``-filter_complex`` arg.

"""

args = (

ffmpeg.input('in')

.drawtext('test', font='a{}b'.format(font))

.output('out')

.get_args()

)

assert args[:3] == ['-i', 'in', '-filter_complex']

assert args[4:] == ['-map', '[s0]', 'out']

match = re.match(

r'\[0\]drawtext=font=a((.|\n)*)b:text=test\[s0\]',

args[3],

re.MULTILINE,

)

assert match is not None, 'Invalid -filter_complex arg: {!r}'.format(args[3])

return match.group(1)

expected_backslash_counts = {

'x': 0,

'\'': 3,

'\\': 3,

'%': 0,

':': 2,

',': 1,

'[': 1,

']': 1,

'=': 2,

'\n': 0,

}

for ch, expected_backslash_count in list(expected_backslash_counts.items()):

expected = '{}{}'.format('\\' * expected_backslash_count, ch)

actual = _get_drawtext_font_repr(ch)

assert expected == actual

def test_filter_text_arg_str_escape():

"""Test string escaping of normal filter args (e.g. ``text`` param of ``drawtext``

filter).

"""

def _get_drawtext_text_repr(text):

"""Build a command-line arg using drawtext ``text`` param and extract the

``-filter_complex`` arg.

"""

args = ffmpeg.input('in').drawtext('a{}b'.format(text)).output('out').get_args()

assert args[:3] == ['-i', 'in', '-filter_complex']

assert args[4:] == ['-map', '[s0]', 'out']

match = re.match(r'\[0\]drawtext=text=a((.|\n)*)b\[s0\]', args[3], re.MULTILINE)

assert match is not None, 'Invalid -filter_complex arg: {!r}'.format(args[3])

return match.group(1)

expected_backslash_counts = {

'x': 0,

'\'': 7,

'\\': 7,

'%': 4,

':': 2,

',': 1,

'[': 1,

']': 1,

'=': 2,

'\n': 0,

}

for ch, expected_backslash_count in list(expected_backslash_counts.items()):

expected = '{}{}'.format('\\' * expected_backslash_count, ch)

actual = _get_drawtext_text_repr(ch)

assert expected == actual

# def test_version():

# subprocess.check_call(['ffmpeg', '-version'])

def test__compile():

out_file = ffmpeg.input('dummy.mp4').output('dummy2.mp4')

assert out_file.compile() == ['ffmpeg', '-i', 'dummy.mp4', 'dummy2.mp4']

assert out_file.compile(cmd='ffmpeg.old') == [

'ffmpeg.old',

'-i',

'dummy.mp4',

'dummy2.mp4',

]

@pytest.mark.parametrize('pipe_stdin', [True, False])

@pytest.mark.parametrize('pipe_stdout', [True, False])

@pytest.mark.parametrize('pipe_stderr', [True, False])

@pytest.mark.parametrize('cwd', [None, '/tmp'])

def test__run_async(mocker, pipe_stdin, pipe_stdout, pipe_stderr, cwd):

process__mock = mock.Mock()

popen__mock = mocker.patch.object(subprocess, 'Popen', return_value=process__mock)

stream = _get_simple_example()

process = ffmpeg.run_async(

stream,

pipe_stdin=pipe_stdin,

pipe_stdout=pipe_stdout,

pipe_stderr=pipe_stderr,

cwd=cwd,

)

assert process is process__mock

expected_stdin = subprocess.PIPE if pipe_stdin else None

expected_stdout = subprocess.PIPE if pipe_stdout else None

expected_stderr = subprocess.PIPE if pipe_stderr else None

(args,), kwargs = popen__mock.call_args

assert args == ffmpeg.compile(stream)

assert kwargs == dict(

stdin=expected_stdin,

stdout=expected_stdout,

stderr=expected_stderr,

cwd=cwd,

)

def test__run():

stream = _get_complex_filter_example()

out, err = ffmpeg.run(stream)

assert out is None

assert err is None

@pytest.mark.parametrize('capture_stdout', [True, False])

@pytest.mark.parametrize('capture_stderr', [True, False])

def test__run__capture_out(mocker, capture_stdout, capture_stderr):

mocker.patch.object(ffmpeg._run, 'compile', return_value=['echo', 'test'])

stream = _get_simple_example()

out, err = ffmpeg.run(

stream, capture_stdout=capture_stdout, capture_stderr=capture_stderr

)

if capture_stdout:

assert out == 'test\n'.encode()

else:

assert out is None

if capture_stderr:

assert err == ''.encode()

else:

assert err is None

def test__run__input_output(mocker):

mocker.patch.object(ffmpeg._run, 'compile', return_value=['cat'])

stream = _get_simple_example()

out, err = ffmpeg.run(stream, input='test'.encode(), capture_stdout=True)

assert out == 'test'.encode()

assert err is None

@pytest.mark.parametrize('capture_stdout', [True, False])

@pytest.mark.parametrize('capture_stderr', [True, False])

def test__run__error(mocker, capture_stdout, capture_stderr):

mocker.patch.object(ffmpeg._run, 'compile', return_value=['ffmpeg'])

stream = _get_complex_filter_example()

with pytest.raises(ffmpeg.Error) as excinfo:

out, err = ffmpeg.run(

stream, capture_stdout=capture_stdout, capture_stderr=capture_stderr

)

assert str(excinfo.value) == 'ffmpeg error (see stderr output for detail)'

out = excinfo.value.stdout

err = excinfo.value.stderr

if capture_stdout:

assert out == ''.encode()

else:

assert out is None

if capture_stderr:

assert err.decode().startswith('ffmpeg version')

else:

assert err is None

def test__run__multi_output():

in_ = ffmpeg.input(TEST_INPUT_FILE1)

out1 = in_.output(TEST_OUTPUT_FILE1)

out2 = in_.output(TEST_OUTPUT_FILE2)

ffmpeg.run([out1, out2], overwrite_output=True)

def test__run__dummy_cmd():

stream = _get_complex_filter_example()

ffmpeg.run(stream, cmd='true')

def test__run__dummy_cmd_list():

stream = _get_complex_filter_example()

ffmpeg.run(stream, cmd=['true', 'ignored'])

def test__filter__custom():

stream = ffmpeg.input('dummy.mp4')

stream = ffmpeg.filter(stream, 'custom_filter', 'a', 'b', kwarg1='c')

stream = ffmpeg.output(stream, 'dummy2.mp4')

assert stream.get_args() == [

'-i',

'dummy.mp4',

'-filter_complex',

'[0]custom_filter=a:b:kwarg1=c[s0]',

'-map',

'[s0]',

'dummy2.mp4',

]

def test__filter__custom_fluent():

stream = (

ffmpeg.input('dummy.mp4')

.filter('custom_filter', 'a', 'b', kwarg1='c')

.output('dummy2.mp4')

)

assert stream.get_args() == [

'-i',

'dummy.mp4',

'-filter_complex',

'[0]custom_filter=a:b:kwarg1=c[s0]',

'-map',

'[s0]',

'dummy2.mp4',

]

def test__merge_outputs():

in_ = ffmpeg.input('in.mp4')

out1 = in_.output('out1.mp4')

out2 = in_.output('out2.mp4')

assert ffmpeg.merge_outputs(out1, out2).get_args() == [

'-i',

'in.mp4',

'out1.mp4',

'out2.mp4',

]

assert ffmpeg.get_args([out1, out2]) == ['-i', 'in.mp4', 'out2.mp4', 'out1.mp4']

def test__input__start_time():

assert ffmpeg.input('in', ss=10.5).output('out').get_args() == [

'-ss',

'10.5',

'-i',

'in',

'out',

]

assert ffmpeg.input('in', ss=0.0).output('out').get_args() == [

'-ss',

'0.0',

'-i',

'in',

'out',

]

def test_multi_passthrough():

out1 = ffmpeg.input('in1.mp4').output('out1.mp4')

out2 = ffmpeg.input('in2.mp4').output('out2.mp4')

out = ffmpeg.merge_outputs(out1, out2)

assert ffmpeg.get_args(out) == [

'-i',

'in1.mp4',

'-i',

'in2.mp4',

'out1.mp4',

'-map',

'1',

'out2.mp4',

]

assert ffmpeg.get_args([out1, out2]) == [

'-i',

'in2.mp4',

'-i',

'in1.mp4',

'out2.mp4',

'-map',

'1',

'out1.mp4',

]

def test_passthrough_selectors():

i1 = ffmpeg.input(TEST_INPUT_FILE1)

args = ffmpeg.output(i1['1'], i1['2'], TEST_OUTPUT_FILE1).get_args()

assert args == [

'-i',

TEST_INPUT_FILE1,

'-map',

'0:1',

'-map',

'0:2',

TEST_OUTPUT_FILE1,

]

def test_mixed_passthrough_selectors():

i1 = ffmpeg.input(TEST_INPUT_FILE1)

args = ffmpeg.output(i1['1'].hflip(), i1['2'], TEST_OUTPUT_FILE1).get_args()

assert args == [

'-i',

TEST_INPUT_FILE1,

'-filter_complex',

'[0:1]hflip[s0]',

'-map',

'[s0]',

'-map',

'0:2',

TEST_OUTPUT_FILE1,

]

def test_pipe():

width = 32

height = 32

frame_size = width * height * 3 # 3 bytes for rgb24

frame_count = 10

start_frame = 2

out = (

ffmpeg.input(

'pipe:0',

format='rawvideo',

pixel_format='rgb24',

video_size=(width, height),

framerate=10,

)

.trim(start_frame=start_frame)

.output('pipe:1', format='rawvideo')

)

args = out.get_args()

assert args == [

'-f',

'rawvideo',

'-video_size',

'{}x{}'.format(width, height),

'-framerate',

'10',

'-pixel_format',

'rgb24',

'-i',

'pipe:0',

'-filter_complex',

'[0]trim=start_frame=2[s0]',

'-map',

'[s0]',

'-f',

'rawvideo',

'pipe:1',

]

cmd = ['ffmpeg'] + args

p = subprocess.Popen(

cmd,

stdin=subprocess.PIPE,

stdout=subprocess.PIPE,

stderr=subprocess.PIPE,

)

in_data = bytes(

bytearray([random.randint(0, 255) for _ in range(frame_size * frame_count)])

)

p.stdin.write(in_data) # note: this could block, in which case need to use threads

p.stdin.close()

out_data = p.stdout.read()

assert len(out_data) == frame_size * (frame_count - start_frame)

assert out_data == in_data[start_frame * frame_size :]

def test__probe():

data = ffmpeg.probe(TEST_INPUT_FILE1)

assert set(data.keys()) == {'format', 'streams'}

assert data['format']['duration'] == '7.036000'

@pytest.mark.skipif(sys.version_info < (3, 3), reason='requires python3.3 or higher')

def test__probe_timeout():

with pytest.raises(subprocess.TimeoutExpired) as excinfo:

ffmpeg.probe(TEST_INPUT_FILE1, timeout=0)

assert 'timed out after 0 seconds' in str(excinfo.value)

def test__probe__exception():

with pytest.raises(ffmpeg.Error) as excinfo:

ffmpeg.probe(BOGUS_INPUT_FILE)

assert str(excinfo.value) == 'ffprobe error (see stderr output for detail)'

assert 'No such file or directory'.encode() in excinfo.value.stderr

def test__probe__extra_args():

data = ffmpeg.probe(TEST_INPUT_FILE1, show_frames=None)

assert set(data.keys()) == {'format', 'streams', 'frames'}

def get_filter_complex_input(flt, name):

m = re.search(r'\[([^]]+)\]{}(?=[[;]|$)'.format(name), flt)

if m:

return m.group(1)

else:

return None

def get_filter_complex_outputs(flt, name):

m = re.search(r'(^|[];]){}((\[[^]]+\])+)(?=;|$)'.format(name), flt)

if m:

return m.group(2)[1:-1].split('][')

else:

return None

def test__get_filter_complex_input():

assert get_filter_complex_input('', 'scale') is None

assert get_filter_complex_input('scale', 'scale') is None

assert get_filter_complex_input('scale[s3][s4];etc', 'scale') is None

assert get_filter_complex_input('[s2]scale', 'scale') == 's2'

assert get_filter_complex_input('[s2]scale;etc', 'scale') == 's2'

assert get_filter_complex_input('[s2]scale[s3][s4];etc', 'scale') == 's2'

def test__get_filter_complex_outputs():

assert get_filter_complex_outputs('', 'scale') is None

assert get_filter_complex_outputs('scale', 'scale') is None

assert get_filter_complex_outputs('scalex[s0][s1]', 'scale') is None

assert get_filter_complex_outputs('scale[s0][s1]', 'scale') == ['s0', 's1']

assert get_filter_complex_outputs('[s5]scale[s0][s1]', 'scale') == ['s0', 's1']

assert get_filter_complex_outputs('[s5]scale[s1][s0]', 'scale') == ['s1', 's0']

assert get_filter_complex_outputs('[s5]scale[s1]', 'scale') == ['s1']

assert get_filter_complex_outputs('[s5]scale[s1];x', 'scale') == ['s1']

assert get_filter_complex_outputs('y;[s5]scale[s1];x', 'scale') == ['s1']

def test__multi_output_edge_label_order():

scale2ref = ffmpeg.filter_multi_output(

[ffmpeg.input('x'), ffmpeg.input('y')], 'scale2ref'

)

out = ffmpeg.merge_outputs(

scale2ref[1].filter('scale').output('a'),

scale2ref[10000].filter('hflip').output('b'),

)

args = out.get_args()

flt_cmpl = args[args.index('-filter_complex') + 1]

out1, out2 = get_filter_complex_outputs(flt_cmpl, 'scale2ref')

assert out1 == get_filter_complex_input(flt_cmpl, 'scale')

assert out2 == get_filter_complex_input(flt_cmpl, 'hflip')

ffmpeg-python/ffmpeg/tests/test_ffmpeg.py at master · kkroening/ffmpeg-python · GitHub

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