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Add support for writing I-frame only tracks, fix track closing race conditions in other muxers

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Vanilagy
2026-03-27 18:48:27 +01:00
parent e2e8aaab78
commit 94678dd356
8 changed files with 200 additions and 30 deletions
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src/isobmff/isobmff-muxer.ts
+10 -2
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@@ -78,6 +78,7 @@ export type IsobmffTrackData = {
firstChunk: number;
samplesPerChunk: number;
}[];
closed: boolean;
} & ({
track: OutputVideoTrack;
type: 'video';
@@ -372,6 +373,7 @@ export class IsobmffMuxer extends Muxer {
finalizedChunks: [],
currentChunk: null,
compactlyCodedChunkTable: [],
closed: false,
};
this.trackDatas.push(newTrackData);
@@ -451,6 +453,7 @@ export class IsobmffMuxer extends Muxer {
finalizedChunks: [],
currentChunk: null,
compactlyCodedChunkTable: [],
closed: false,
};
this.trackDatas.push(newTrackData);
@@ -492,6 +495,7 @@ export class IsobmffMuxer extends Muxer {
finalizedChunks: [],
currentChunk: null,
compactlyCodedChunkTable: [],
closed: false,
lastCueEndTimestamp: 0,
cueQueue: [],
@@ -965,7 +969,7 @@ export class IsobmffMuxer extends Muxer {
return firstQueuedSample.type === 'key';
}
return otherTrackData.track.source._closed;
return otherTrackData.closed;
});
if (
@@ -1055,7 +1059,7 @@ export class IsobmffMuxer extends Muxer {
let minTimestamp = Infinity;
for (const trackData of this.trackDatas) {
if (!isFinalCall && trackData.sampleQueue.length === 0 && !trackData.track.source._closed) {
if (!isFinalCall && trackData.sampleQueue.length === 0 && !trackData.closed) {
break outer;
}
@@ -1246,6 +1250,8 @@ export class IsobmffMuxer extends Muxer {
const trackData = this.trackDatas.find(x => x.track === track);
if (trackData) {
trackData.closed = true;
if (trackData.type === 'subtitle' && track.source._codec === 'webvtt') {
await this.processWebVTTCues(trackData, Infinity);
}
@@ -1272,6 +1278,8 @@ export class IsobmffMuxer extends Muxer {
this.allTracksKnown.resolve();
for (const trackData of this.trackDatas) {
trackData.closed = true;
if (trackData.type === 'subtitle' && trackData.track.source._codec === 'webvtt') {
await this.processWebVTTCues(trackData, Infinity);
}