Av

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Minor:

- Update binary wheels to fix security vulnerabilities (:issue:`901`).

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Major:

- Re-implement AudioResampler with aformat and buffersink (:issue:`761`).
AudioResampler.resample() now returns a list of frames.
- Remove deprecated methods: AudioFrame.to_nd_array, VideoFrame.to_nd_array and Stream.seek.

Minor:

- Provide binary wheels for macOS/arm64 and Linux/aarch64.
- Simplify setup.py, require Cython.
- Update the installation instructions in favor of PyPI.
- Fix VideoFrame.to_image with height & width (:issue:`878`).
- Fix setting Stream time_base (:issue:`784`).
- Replace deprecated av_init_packet with av_packet_alloc (:issue:`872`).
- Validate pixel format in VideoCodecContext.pix_fmt setter (:issue:`815`).
- Fix AudioFrame ndarray conversion endianness (:issue:`833`).
- Improve time_base support with filters (:issue:`765`).
- Allow flushing filters by sending `None` (:issue:`886`).
- Avoid unnecessary vsnprintf() calls in log_callback() (:issue:`877`).
- Make Frame.from_ndarray raise ValueError instead of AssertionError.

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Minor:

- Update FFmpeg to 4.3.2 for the binary wheels.
- Provide binary wheels for Python 3.10 (:issue:`820`).
- Stop providing binary wheels for end-of-life Python 3.6.
- Fix args order in Frame.__repr__ (:issue:`749`).
- Fix documentation to remove unavailable QUIET log level (:issue:`719`).
- Expose codec_context.codec_tag (:issue:`741`).
- Add example for encoding with a custom PTS (:issue:`725`).
- Use av_packet_rescale_ts in Packet._rebase_time() (:issue:`737`).
- Do not hardcode errno values in test suite (:issue:`729`).
- Use av_guess_format for output container format (:issue:`691`).
- Fix setting CodecContext.extradata (:issue:`658`, :issue:`740`).
- Fix documentation code block indentation (:issue:`783`).
- Fix link to Conda installation instructions (:issue:`782`).
- Export AudioStream from av.audio (:issue:`775`).
- Fix setting CodecContext.extradata (:issue:`801`).

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Minor:

- Update FFmpeg to 4.3.1 for the binary wheels.

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Minor:

- Enable GnuTLS support in the FFmpeg build used for binary wheels (:issue:`675`).
- Make binary wheels compatible with Mac OS X 10.9+ (:issue:`662`).
- Drop Python 2.x buffer protocol code.
- Remove references to previous repository location.

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Minor:

- Enable additional FFmpeg features in the binary wheels.
- Use os.fsencode for both input and output file names (:issue:`600`).