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NetterSilverandClaude Opus 5.5
d8bca3cdd9
Movie exports (H.264, HEVC, AV1, ProRes, uncompressed) rendered a batch of frames on every core, then encoded it frame by frame while the render threads waited. Each batch now encodes on a pool shared by all exports while the next batch renders (Cx::frames_beside). With deferred GPU readbacks, or where no thread can be started (wasm without threads), the two still take turns. A panicking encoder becomes an export error. H.264 frames are converted to 4:2:0 on the render threads, per frame, instead of on the encoder's critical path. The conversion reads 8-bit levels from a table and rounds without a libm call; both give the same values as before (tested against the previous formula). Demo comp (1920x1080, 300 frames) to H.264 on a 16-thread Ryzen, export wall time -6% (median of 7 interleaved runs); output byte-identical. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>