Read #EXT-X-PROGRAM-DATE-TIME, add Unix epoch-offset timestamps, parallelize HLS master playlist resolution

src/wave/wave-demuxer.ts

@@ -394,6 +394,10 @@ class WaveAudioTrackBacking implements InputAudioTrackBacking {
 		return this.demuxer.audioInfo.sampleRate;
 	}
 
+	getTimestampsAreRelativeToUnixEpoch() {
+		return false;
+	}
+
 	getGroupId() {
 		return this.getId();
 	}