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/mpeg-ts/mpeg-ts-demuxer.ts

@@ -713,6 +713,11 @@ export class MpegTsDemuxer extends Demuxer {
 			}
 
 			for (const stream of this.elementaryStreams) {
+				if (!stream.initialized) {
+					// Stream was declared but no initialization data for it was found
+					continue;
+				}
+
 				if (stream.info.type === 'video') {
 					this.trackBackingEntries.push(
 						new MpegTsVideoTrackBacking(stream as ElementaryVideoStream),

src/mpeg-ts/mpeg-ts-muxer.ts

@@ -112,7 +112,7 @@ export class MpegTsMuxer extends Muxer {
 			return existingTrackData;
 		}
 
-		validateVideoChunkMetadata(meta);
+		validateVideoChunkMetadata(meta, track.source._codec);
 		assert(meta?.decoderConfig);
 
 		const codec = track.source._codec;
@@ -157,7 +157,7 @@ export class MpegTsMuxer extends Muxer {
 			return existingTrackData;
 		}
 
-		validateAudioChunkMetadata(meta);
+		validateAudioChunkMetadata(meta, track.source._codec);
 		assert(meta?.decoderConfig);
 
 		const codec = track.source._codec;