Try using psutil.Popen if available (#85)

.github/workflows/ci.yml

@@ -47,8 +47,10 @@ jobs:
           architecture: x64
       - run: |
           pip install "cryptography<44.0.0" poetry  # cryptography 44.0.0 is not compatible with pypy3.8
-          poetry install --with dev
-      - run: poetry run pytest --cov=ffmpy --cov-report xml
+          poetry install
+          poetry run pytest --cov=ffmpy --cov-report xml
+          poetry install --extras psutil
+          poetry run pytest --cov=ffmpy --cov-report xml --cov-append
       - uses: codecov/codecov-action@v4
         if: matrix.python-version == 3.12
         with:

ffmpy/ffmpy.py

@@ -6,6 +6,15 @@
 import subprocess
 from typing import IO, Any, Mapping, Sequence
 
+try:
+    from psutil import Popen  # noqa: F401
+
+    popen: type[subprocess.Popen | Popen]
+except ImportError:
+    popen = subprocess.Popen
+else:
+    popen = Popen
+
 
 class FFmpeg:
     """Wrapper for various `FFmpeg <https://www.ffmpeg.org/>`_ related applications (ffmpeg,
@@ -56,7 +65,7 @@ def __init__(
             self._cmd += _merge_args_opts(outputs)
 
         self.cmd = subprocess.list2cmdline(self._cmd)
-        self.process: subprocess.Popen | None = None
+        self.process: subprocess.Popen | Popen | None = None
 
     def __repr__(self) -> str:
         return f"<{self.__class__.__name__!r} {self.cmd!r}>"
@@ -100,7 +109,7 @@ def run(
             `FFExecutableNotFoundError` in case the executable path passed was not valid
         """
         try:
-            self.process = subprocess.Popen(
+            self.process = popen(
                 self._cmd, stdin=subprocess.PIPE, stdout=stdout, stderr=stderr, env=env, **kwargs
             )
         except OSError as e:

pyproject.toml

@@ -44,12 +44,16 @@ packages = [{ include = "ffmpy" }]
 
 [tool.poetry.dependencies]
 python = "^3.8"
+psutil = { version = ">=5.5.0", optional = true } # 5.5.0 was realease around the same time as Python 3.8
 
 [tool.poetry.group.dev.dependencies]
 mypy = "^1.13.0"
 pytest = "^8.3.4"
 pytest-cov = "^5.0.0"
 
+[tool.poetry.extras]
+psutil = ["psutil"]
+
 [build-system]
 requires = ["poetry-core"]
 build-backend = "poetry.core.masonry.api"

tests/test_cmd_execution.py

@@ -202,7 +202,7 @@ def test_terminate_process() -> None:
     assert ff.process.returncode == -15
 
 
-@mock.patch("ffmpy.ffmpy.subprocess.Popen")
+@mock.patch("ffmpy.ffmpy.popen")
 def test_custom_env(popen_mock: mock.MagicMock) -> None:
     ff = FFmpeg()
     popen_mock.return_value.communicate.return_value = ("output", "error")
@@ -213,7 +213,7 @@ def test_custom_env(popen_mock: mock.MagicMock) -> None:
     )
 
 
-@mock.patch("ffmpy.ffmpy.subprocess.Popen")
+@mock.patch("ffmpy.ffmpy.popen")
 def test_arbitraty_popen_kwargs(popen_mock: mock.MagicMock) -> None:
     ff = FFmpeg()
     popen_mock.return_value.communicate.return_value = ("output", "error")