error during building on python 3.10

[chiboreache]

Arch Linux - everything is bleeding edge..

==> Starting build()...
running build
running build_py
creating build
creating build/lib
creating build/lib/ffmpeg
copying ffmpeg/_view.py -> build/lib/ffmpeg
copying ffmpeg/_filters.py -> build/lib/ffmpeg
copying ffmpeg/_probe.py -> build/lib/ffmpeg
copying ffmpeg/_utils.py -> build/lib/ffmpeg
copying ffmpeg/dag.py -> build/lib/ffmpeg
copying ffmpeg/_run.py -> build/lib/ffmpeg
copying ffmpeg/_ffmpeg.py -> build/lib/ffmpeg
copying ffmpeg/__init__.py -> build/lib/ffmpeg
copying ffmpeg/nodes.py -> build/lib/ffmpeg
==> Starting check()...
=========================================================================== test session starts ===========================================================================
platform linux -- Python 3.10.2, pytest-6.2.5, py-1.11.0, pluggy-0.13.1
rootdir: /home/chibo/.cache/yay/python-ffmpeg/src/ffmpeg-python-0.2.0, configfile: pytest.ini, testpaths: ffmpeg/tests
plugins: mock-3.7.0
collected 60 items                                                                                                                                                        

ffmpeg/tests/test_ffmpeg.py .....................................................F......                                                                            [100%]

================================================================================ FAILURES =================================================================================
________________________________________________________________________________ test_pipe ________________________________________________________________________________

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)
E       AssertionError: assert 30720 == (3072 * (10 - 2))
E        +  where 30720 = len(b'\xe1\xb7\xc8hT\x7fN\x87\xfe\xf7\xda\x16\x14\x1b26H\xb6\xc2\xddm\x00\xac\xbeRa\x98\x9c(\x05\n\xddl\xec0\xbc+}\x0bv\t\...9\xe2\xc8L\x829\xd5\xa4-w\\\xb6l\x88`\xa3is\xa1\x91\x97~\xb4\x85\xee\xc9F\xdb\xba\xe2\t\xd0\x85$\xfc\x16\xe6\xb9\x97eG')

ffmpeg/tests/test_ffmpeg.py:699: AssertionError
============================================================================ warnings summary =============================================================================
../../../../../../../usr/lib/python3.10/site-packages/past/builtins/misc.py:45
/usr/lib/python3.10/site-packages/past/builtins/misc.py:45: DeprecationWarning: the imp module is deprecated in favour of importlib and slated for removal in Python 3.12; see the module's documentation for alternative uses
from imp import reload

ffmpeg/tests/test_ffmpeg.py:31
/home/chibo/.cache/yay/python-ffmpeg/src/ffmpeg-python-0.2.0/ffmpeg/tests/test_ffmpeg.py:31: DeprecationWarning: invalid escape sequence '\:'
assert ffmpeg._utils.escape_chars('a:b', ':') == 'a\:b'

ffmpeg/tests/test_ffmpeg.py::test__get_filter_complex_input
ffmpeg/tests/test_ffmpeg.py::test__multi_output_edge_label_order
/home/chibo/.cache/yay/python-ffmpeg/src/ffmpeg-python-0.2.0/ffmpeg/tests/test_ffmpeg.py:722: FutureWarning: Possible nested set at position 20
m = re.search(r'\[([^]]+)\]{}(?=[[;]|$)'.format(name), flt)

-- Docs: https://docs.pytest.org/en/stable/warnings.html
========================================================================= short test summary info =========================================================================
FAILED ffmpeg/tests/test_ffmpeg.py::test_pipe - AssertionError: assert 30720 == (3072 * (10 - 2))
================================================================ 1 failed, 59 passed, 4 warnings in 0.59s =================================================================
==> ERROR: A failure occurred in check().
Aborting...
-> error making: python-ffmpeg

[frankspace]

I have the same issue. I'm on Artix, compiling in a clean chroot. I tried building the most-recent version from git as well, same result. I attempted to see if the problem was ffmpeg 5 rather than 4.4, but the legacy ffmpeg4.4 package doesn't seem to have files in the right directories and I'm not totally sure how to work around that.

[ghost]

Getting the same error from AUR repository. Any idea on how to fix this?

[gardockt]

After analyzing this issue, it looks like @frankspace 's hypothesis is correct - it is not caused by python 3.10, but ffmpeg 5.0. It can be worked around by doing a downgrade.

Command for downgrading on Arch-based distributions (downgrades ffmpeg, vmaf and x264 - downgrading other packages may be needed as well): THIS WAS TESTED ONLY IN A CONTAINER - DOWNGRADING PACKAGES MAY BREAK YOUR SYSTEM - USE AT YOUR OWN RISK pacman -U https://archive.archlinux.org/packages/f/ffmpeg/ffmpeg-2%3A4.4.1-1-x86_64.pkg.tar.zst https://archive.archlinux.org/packages/x/x264/x264-3%3A0.163.r3060.5db6aa6-1-x86_64.pkg.tar.zst https://archive.archlinux.org/packages/v/vmaf/vmaf-1.5.3-1-x86_64.pkg.tar.zst Alternatively it is possible to use pacman's cache, as described here.

Depending on your use case, another possible workaround is to remove the failing test (test_pipe) from ffmpeg/tests/test_ffmpeg.py.

[chiboreache]

downgrade was never an option..

[Technetium1]

Here's another build log failing in the same way: https://builds.garudalinux.org/repos/chaotic-aur/logs/python-ffmpeg.log

[Technetium1]

Possible fix here? https://aur.archlinux.org/cgit/aur.git/tree/test_pipe.patch?h=python-ffmpeg-patched-git

diff --git a/ffmpeg/tests/test_ffmpeg.py b/ffmpeg/tests/test_ffmpeg.py
index 8dbc271..df0eb52 100644
--- a/ffmpeg/tests/test_ffmpeg.py
+++ b/ffmpeg/tests/test_ffmpeg.py
@@ -684,6 +684,7 @@ def test_mixed_passthrough_selectors():
     ]

+'''
 def test_pipe():
     width = 32
     height = 32
@@ -741,6 +742,7 @@ def test_pipe():
     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():