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MPEG-TS demuxer optimizations: faster Annex B segmentation, better NALU iteration

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Vanilagy
2026-01-16 13:26:58 +01:00
parent e3ee9d91a9
commit ae37973878
7 changed files with 267 additions and 238 deletions
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src/isobmff/isobmff-muxer.ts
+3 -2
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@@ -28,7 +28,7 @@ import {
concatNalUnitsInLengthPrefixed,
extractAvcDecoderConfigurationRecord,
extractHevcDecoderConfigurationRecord,
findNalUnitsInAnnexB,
iterateNalUnitsInAnnexB,
serializeAvcDecoderConfigurationRecord,
serializeHevcDecoderConfigurationRecord,
} from '../codec-data';
@@ -465,7 +465,8 @@ export class IsobmffMuxer extends Muxer {
let packetData = packet.data;
if (trackData.info.requiresAnnexBTransformation) {
const nalUnits = findNalUnitsInAnnexB(packetData);
const nalUnits = [...iterateNalUnitsInAnnexB(packetData)]
.map(loc => packetData.subarray(loc.offset, loc.offset + loc.length));
if (nalUnits.length === 0) {
// It's not valid Annex B data
throw new Error(