Running setup.py install for av ... error ERROR: Command errored out with exit status 1: command: /usr/bin/python3 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-tdmvuj_a/av/setup.py'"'"'; __file__='"'"'/tmp/pip-install-tdmvuj_a/av/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /tmp/pip-record-epc_s7v9/install-record.txt --single-version-externally-managed --compile --install-headers /usr/include/python3.8/av cwd: /tmp/pip-install-tdmvuj_a/av/ Complete output (48 lines): running install running build running build_py creating build creating build/lib.linux-x86_64-3.8 creating build/lib.linux-x86_64-3.8/av copying av/__init__.py -> build/lib.linux-x86_64-3.8/av copying av/__main__.py -> build/lib.linux-x86_64-3.8/av copying av/deprecation.py -> build/lib.linux-x86_64-3.8/av copying av/datasets.py -> build/lib.linux-x86_64-3.8/av creating build/lib.linux-x86_64-3.8/av/data copying av/data/__init__.py -> build/lib.linux-x86_64-3.8/av/data creating build/lib.linux-x86_64-3.8/av/container copying av/container/__init__.py -> build/lib.linux-x86_64-3.8/av/container creating build/lib.linux-x86_64-3.8/av/video copying av/video/__init__.py -> build/lib.linux-x86_64-3.8/av/video creating build/lib.linux-x86_64-3.8/av/subtitles copying av/subtitles/__init__.py -> build/lib.linux-x86_64-3.8/av/subtitles creating build/lib.linux-x86_64-3.8/av/audio copying av/audio/__init__.py -> build/lib.linux-x86_64-3.8/av/audio creating build/lib.linux-x86_64-3.8/av/codec copying av/codec/__init__.py -> build/lib.linux-x86_64-3.8/av/codec creating build/lib.linux-x86_64-3.8/av/sidedata copying av/sidedata/__init__.py -> build/lib.linux-x86_64-3.8/av/sidedata creating build/lib.linux-x86_64-3.8/av/filter copying av/filter/__init__.py -> build/lib.linux-x86_64-3.8/av/filter running build_ext running config PyAV: 8.0.2 (unknown commit) Python: 3.8.5 (default, Jul 20 2020, 23:08:58) \n[GCC 9.3.0] platform: Linux-4.15.0-112-generic-x86_64-with extension_extra: include_dirs: [b'include'] libraries: [] library_dirs: [] define_macros: [] runtime_library_dirs: [] config_macros: PYAV_COMMIT_STR="unknown-commit" PYAV_VERSION=8.0.2 PYAV_VERSION_STR="8.0.2" Could not find libavformat with pkg-config. Could not find libavcodec with pkg-config. Could not find libavdevice with pkg-config. Could not find libavutil with pkg-config. Could not find libavfilter with pkg-config. Could not find libswscale with pkg-config. Could not find libswresample with pkg-config. ---------------------------------------- ERROR: Command errored out with exit status 1: /usr/bin/python3 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-tdmvuj_a/av/setup.py'"'"'; __file__='"'"'/tmp/pip-install-tdmvuj_a/av/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /tmp/pip-record-epc_s7v9/install-record.txt --single-version-externally-managed --compile --install-headers /usr/include/python3.8/av Check the logs for full command output. 

- FFmpeg: 

 ## Research I have done the following: - [x] Checked the [PyAV documentation](https://pyav.org/docs) - [x] Searched on [Google](https://www.google.com/search?q=pyav+how+do+I+foo) - [x] Searched on [Stack Overflow](https://stackoverflow.com/search?q=pyav) - [x] Looked through [old GitHub issues](https://github.com/PyAV-Org/PyAV/issues?&q=is%3Aissue) - [x] Asked on [PyAV Gitter](https://gitter.im/PyAV-Org) - [ ] ... and waited 72 hours for a response. ## Additional context I am trying to use aiortc for a project within an Alpine Linux docker container, and this is the only aspect wanting