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Add limited edit list support

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Vanilagy
2025-02-09 17:21:41 +01:00
parent f750bcfa21
commit 6cdaa06c07
4 changed files with 69 additions and 16 deletions
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src/conversion.ts
+10 -7
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@@ -341,7 +341,8 @@ class Conversion {
height = ceilToMultipleOfTwo(this.options.video.height);
}
const needsReencode = !!this.options.video?.forceReencode || this.startTimestamp > 0;
const firstTimestamp = await track.getFirstTimestamp();
const needsReencode = !!this.options.video?.forceReencode || this.startTimestamp > 0 || firstTimestamp < 0;
const needsResize = width !== originalWidth || height !== originalHeight;
let videoCodecs = this.output.format.getSupportedVideoCodecs();
@@ -513,11 +514,14 @@ class Conversion {
const originalNumberOfChannels = track.numberOfChannels;
const originalSampleRate = track.sampleRate;
const firstTimestamp = await track.getFirstTimestamp();
let numberOfChannels = this.options.audio?.numberOfChannels ?? originalNumberOfChannels;
let sampleRate = this.options.audio?.sampleRate ?? originalSampleRate;
let needsResample = numberOfChannels !== originalNumberOfChannels
|| sampleRate !== originalSampleRate
|| this.startTimestamp > 0;
|| this.startTimestamp > 0
|| firstTimestamp < 0;
let audioCodecs = this.output.format.getSupportedAudioCodecs();
if (
@@ -671,13 +675,12 @@ class Conversion {
await track.computeDuration() - this.startTimestamp,
this.endTimestamp - this.startTimestamp,
);
const totalFrameCount = Math.round(trackDuration * FALLBACK_SAMPLE_RATE);
const MAX_CHUNK_LENGTH = 5 * FALLBACK_SAMPLE_RATE;
const totalFrameCount = Math.round(trackDuration * targetSampleRate);
const maxChunkLength = 5 * targetSampleRate;
let currentContextStartFrame = 0;
let currentContext: OfflineAudioContext | null = new OfflineAudioContext({
length: Math.min(totalFrameCount - currentContextStartFrame, MAX_CHUNK_LENGTH),
length: Math.min(totalFrameCount - currentContextStartFrame, maxChunkLength),
numberOfChannels: targetNumberOfChannels,
sampleRate: targetSampleRate,
});
@@ -719,7 +722,7 @@ class Conversion {
const newLength = Math.min(
totalFrameCount - currentContextStartFrame,
MAX_CHUNK_LENGTH,
maxChunkLength,
);
currentContext = newLength > 0
? new OfflineAudioContext({