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Dylan M. Taylor e7c3dda7f3 craft-video: AV1 and HEVC take the colour description; AV1 motion search from EffectCraft (#829 )

Three-way merge of the changes EffectCraft made to its av1enc and hevcenc
crates after craft-video took them:

- hevc: EncoderConfig carries colour_primaries, transfer_characteristics and
  matrix_coeffs (H.273 code points, BT.709 by default) and the VUI writes them.
- av1: EncoderConfig carries color_primaries, transfer_characteristics and
  matrix_coefficients and color_config writes them.
- av1: motion search keeps a visited set and stops a SAD once it cannot win,
  SATD has fixed-size kernels, and a decision snapshot saves only the block's
  BlockDecoded flags. Output is unchanged.

ffprobe tests check the colour description of both streams.

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examples

craft-video: H.264 decoder from FilmCraft, with DeckCraft's hardening (h264-decode) (#834 )

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src

craft-video: AV1 and HEVC take the colour description; AV1 motion search from EffectCraft (#829 )

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tests

craft-video: AV1 and HEVC take the colour description; AV1 motion search from EffectCraft (#829 )

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tools

craft-video: HEVC decoder from FilmCraft, with DeckCraft's hardening (hevc-decode) (#828 )

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Cargo.toml

craft-video: AV1 and HEVC take the colour description; AV1 motion search from EffectCraft (#829 )

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README.md

craft-video: H.264 decoder from FilmCraft, with DeckCraft's hardening (h264-decode) (#834 )

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README.md

craft-video

Clean-room pure-Rust video codecs for the Craft apps, one feature per codec: DNxHD/DNxHR, VP8, ProRes and H.264.

Input and output are byte slices and planar sample buffers; the crate opens no files itself and performs no filesystem I/O.
Implemented from published standards and RFCs (SMPTE ST 2019-1, RFC 6386, SMPTE RDD 36 and ITU-T H.264).
Tested against ffmpeg as an external oracle with roundtrips, hostile fuzzing, and conformance vectors. No unsafe, no panics on corrupt streams. Builds for wasm32-unknown-unknown.
Containers (MP4/MOV, Matroska/WebM), bit-level I/O (craft_media::bitstream) and shared identifiers (CodecId, CodecParams) come from craft-media.

Cargo features

No codec feature is on by default.

Feature	Module	Codec
`dnx`	`dnx`	Avid DNxHD / DNxHR (SMPTE ST 2019-1 VC-3): decoder and encoder
`vp8`	`vp8`	VP8 (RFC 6386): decoder
`prores`	`prores`	Apple ProRes (SMPTE RDD 36): decoder and encoder
`h264`	`h264`	ITU-T H.264 / AVC: decoder (`h264-decode` alone) and encoder (`h264-encode` alone)
`hevc`	`hevc`	ITU-T H.265 / HEVC: decoder (`hevc-decode` alone) and encoder (`hevc-encode` alone)
`vp9`	`vp9`	VP9: decoder (`vp9-decode` alone) and encoder (`vp9-encode` alone)
`av1`	`av1`	AV1 (AOMedia Video 1): encoder
`threads`	—	Multi-threaded slice/row parallelism via `rayon`