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Add video frame preprocessing to VideoEncodingConfig & VideoEncoderWrapper

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Vanilagy
2026-04-01 13:30:34 +02:00
parent 3400b3ac12
commit 024660773b
8 changed files with 1021 additions and 201 deletions
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src/conversion.ts
+8 -8
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@@ -38,7 +38,9 @@ import {
} from './media-source';
import {
assert,
ceilToMultipleOfTwo,
clamp,
floorToDivisor,
isIso639Dash2LanguageCode,
MaybePromise,
normalizeRotation,
@@ -915,9 +917,9 @@ export class Conversion {
? [track.squarePixelWidth, track.squarePixelHeight]
: [track.squarePixelHeight, track.squarePixelWidth];
const crop = trackOptions.crop;
let crop = trackOptions.crop;
if (crop) {
clampCropRectangle(crop, rotatedWidth, rotatedHeight);
crop = clampCropRectangle(crop, rotatedWidth, rotatedHeight);
}
const [originalWidth, originalHeight] = crop
@@ -929,8 +931,6 @@ export class Conversion {
const aspectRatio = width / height;
// A lot of video encoders require that the dimensions be multiples of 2
const ceilToMultipleOfTwo = (value: number) => Math.ceil(value / 2) * 2;
if (trackOptions.width !== undefined && trackOptions.height === undefined) {
width = ceilToMultipleOfTwo(trackOptions.width);
height = ceilToMultipleOfTwo(Math.round(width / aspectRatio));
@@ -1144,7 +1144,7 @@ export class Conversion {
if (frameRate !== undefined) {
// Logic for skipping/repeating frames when a frame rate is set
const alignedTimestamp = Math.floor(adjustedSampleTimestamp * frameRate) / frameRate;
const alignedTimestamp = floorToDivisor(adjustedSampleTimestamp, frameRate);
if (lastCanvas !== null) {
if (alignedTimestamp <= lastCanvasTimestamp!) {
@@ -1180,7 +1180,7 @@ export class Conversion {
assert(frameRate !== undefined);
// If necessary, pad until the end timestamp of the last sample
await padFrames(Math.floor(lastCanvasEndTimestamp * frameRate) / frameRate);
await padFrames(floorToDivisor(lastCanvasEndTimestamp, frameRate));
}
source.close();
@@ -1225,7 +1225,7 @@ export class Conversion {
if (frameRate !== undefined) {
// Logic for skipping/repeating frames when a frame rate is set
const alignedTimestamp = Math.floor(adjustedSampleTimestamp * frameRate) / frameRate;
const alignedTimestamp = floorToDivisor(adjustedSampleTimestamp, frameRate);
if (lastSample !== null) {
if (alignedTimestamp <= lastSampleTimestamp!) {
@@ -1261,7 +1261,7 @@ export class Conversion {
assert(frameRate !== undefined);
// If necessary, pad until the end timestamp of the last sample
await padFrames(Math.floor(lastSampleEndTimestamp * frameRate) / frameRate);
await padFrames(floorToDivisor(lastSampleEndTimestamp, frameRate));
}
source.close();