Packaging fails on Python 3.9

[ivelin]

See #45 and #44 .

[amotl]

Hi Ivelin,

when exploring the root cause

src/av/codec/codec.c:6117:36: error: ‘AV_CODEC_CAP_HARDWARE’ undeclared (first use in this function); did you mean ‘AV_CODEC_CAP_DR1’?

I found PyAV-Org/PyAV#651 and aiortc/aiortc#326, which somehow suggest the build needs ffmpeg >= 4 and maybe other updated libraries.

Apart from that, PyAV-Org/PyAV#619 (comment) states that

As of PyAV 8.0.0, binary wheels are provided which will greatly simplify installation and should solve your issue.

Unfortunately, there are no binary wheels for Python 3.9 yet, see [1]. @Odianosen25 observed the same within PyAV-Org/PyAV#697. So, we probably should add a friendly question at [2], asking whether building and uploading binary wheels for Python 3.9 to PyPI would be possible.

With kind regards,
Andreas.

[1] https://pypi.org/project/av/#files
[2] https://github.com/PyAV-Org/PyAV/issues

[amotl]

... which somehow suggest the build needs ffmpeg >= 4 and maybe other updated libraries.

Apparently, all dependency packages regarding ffmpeg and friends are satisfied with ubuntu-20.04 already. So, #47 will fix the build on GHA.

We probably should add a friendly question at [2], asking whether building and uploading binary wheels for Python 3.9 to PyPI would be possible.

That still holds true and will make installation for downstream users easier.

[2] https://github.com/PyAV-Org/PyAV/issues

[ivelin]

🎉 This issue has been resolved in version 1.4.2 🎉

The release is available on GitHub release

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