Merge origin/main into the NVENC branch. #183 already provides the
HardwareEncoding enum, ExportSettings.hardware_encoding, the
hardwareEncoding export param and the Export > Video > Hardware Encoding
checkbox, so the duplicates from this branch are dropped and NVENC uses
them. filmcraft-export is now an all-platform dependency of
filmcraft-platform (VideoToolbox and NVENC both register encoders).
Never-crash fixes in the NVENC backend:
- submit() rejects a driver input pitch narrower than a row (and unlocks
the buffer); fill_nv12 uses get_mut instead of slicing rows.
- composition offsets use saturating math and i32::try_from; frame-rate,
size and timestamp casts are checked; sizes above u16::MAX decline.
- Annex B scanning and NAL type checks use get()/first().
- A failed nvEncOpenEncodeSessionEx that returns a handle destroys it.
ffi.rs carries NVIDIA's MIT notice for nvEncodeAPI.h, listed in
ATTRIBUTION.md under a new "Third-party source code" section.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Brandon ThomasandClaude Opus 5.5
853f03b1aa