Fix HLS writing an incomplete init segment for sparse segments, improve decoder config validation, fix getFirstTimestamp() for Inputs with zero-packet tracks, allow zero-track muxing for some formats that allow it, add new track metadata that allows you to specify the decoder config early (enables zero-packet tracks), fix trafIndices in sparse fragmented MP4s, fix assertion errors in MPEG-TS demuxer

src/adts/adts-muxer.ts

@@ -64,7 +64,7 @@ export class AdtsMuxer extends Muxer {
 
 			// First packet - determine input format from metadata
 			if (this.inputIsAdts === null) {
-				validateAudioChunkMetadata(meta);
+				validateAudioChunkMetadata(meta, track.source._codec);
 
 				const description = meta?.decoderConfig?.description;
 
@@ -119,6 +119,11 @@ export class AdtsMuxer extends Muxer {
 
 	async finalize() {
 		const release = await this.mutex.acquire(); // Required so that finalize() can't resolve before other calls
+
+		if (this.inputIsAdts === null) {
+			throw new Error('Cannot finalize an empty ADTS file: not a single packet was added.');
+		}
+
 		release();
 	}
 }