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Implement @mediabunny/prores extension, add onError callbacks to custom coders, fix visibleRect bug in VideoSample

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Vanilagy
2026-06-29 17:15:10 +02:00
parent af618f014a
commit 8ae0f9d09e
42 changed files with 1074 additions and 451 deletions
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src/encode.ts
+6 -6
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@@ -549,20 +549,20 @@ export class Quality {
/** @internal */
_toVideoBitrate(codec: VideoCodec, width: number, height: number) {
const pixels = width * height;
const referencePixels = 1920 * 1080;
const referenceBitrate = 3_000_000;
const scaleFactor = Math.pow(pixels / referencePixels, 0.95); // Slight non-linear scaling
const baseBitrate = referenceBitrate * scaleFactor;
const codecEfficiencyFactors = {
const codecEfficiencyFactors: Record<VideoCodec, number> = {
avc: 1.0, // H.264/AVC (baseline)
hevc: 0.6, // H.265/HEVC (~40% more efficient than AVC)
vp9: 0.6, // Similar to HEVC
av1: 0.4, // ~60% more efficient than AVC
vp8: 1.2, // Slightly less efficient than AVC
prores: 220_000_000 / referenceBitrate, // Apple ProRes white paper claims 220 Mbps for 1080p 422 HQ @30Hz
};
const referencePixels = 1920 * 1080;
const referenceBitrate = 3000000;
const scaleFactor = Math.pow(pixels / referencePixels, 0.95); // Slight non-linear scaling
const baseBitrate = referenceBitrate * scaleFactor;
const codecAdjustedBitrate = baseBitrate * codecEfficiencyFactors[codec];
const finalBitrate = codecAdjustedBitrate * this._factor;