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

src/ogg/ogg-muxer.ts

@@ -17,7 +17,8 @@ import {
 } from '../misc';
 import { Muxer } from '../muxer';
 import { Output,
-	OutputAudioTrack } from '../output';
+	OutputAudioTrack,
+	OutputTrack } from '../output';
 import { OggOutputFormat } from '../output-format';
 import { EncodedPacket } from '../packet';
 import { Writer } from '../writer';
@@ -48,6 +49,7 @@ type OggTrackData = {
 	currentPageSize: number;
 	currentPageStartsWithFreshPacket: boolean;
 	currentPageStartTimestampInSamples: number;
+	closed: boolean;
 };
 
 type Packet = {
@@ -136,6 +138,7 @@ export class OggMuxer extends Muxer {
 			currentPageSize: 27,
 			currentPageStartsWithFreshPacket: true,
 			currentPageStartTimestampInSamples: 0,
+			closed: false,
 		};
 
 		this.queueHeaderPackets(newTrackData, meta);
@@ -335,7 +338,7 @@ export class OggMuxer extends Muxer {
 				if (
 					!isFinalCall
 					&& trackData.packetQueue.length <= 1 // Limit is 1, not 0, for correct EOS flag logic
-					&& !trackData.track.source._closed
+					&& !trackData.closed
 				) {
 					break outer;
 				}
@@ -485,9 +488,14 @@ export class OggMuxer extends Muxer {
 	}
 
 	// eslint-disable-next-line @typescript-eslint/no-misused-promises
-	override async onTrackClose() {
+	override async onTrackClose(track: OutputTrack) {
 		const release = await this.mutex.acquire();
 
+		const trackData = this.trackDatas.find(x => x.track === track);
+		if (trackData) {
+			trackData.closed = true;
+		}
+
 		if (this.allTracksAreKnown()) {
 			this.allTracksKnown.resolve();
 		}
@@ -503,6 +511,10 @@ export class OggMuxer extends Muxer {
 
 		this.allTracksKnown.resolve();
 
+		for (const trackData of this.trackDatas) {
+			trackData.closed = true;
+		}
+
 		await this.interleavePages(true);
 
 		for (const trackData of this.trackDatas) {