Add HlsInputFormatOptions.offsetTimestampsByDateTime option, add InputTrack.getUnixTimeForTimestamp()

src/adts/adts-demuxer.ts

@@ -215,6 +215,10 @@ class AdtsAudioTrackBacking implements InputAudioTrackBacking {
 		return false;
 	}
 
+	getUnixTimeForTimestamp() {
+		return null;
+	}
+
 	getPairingMask() {
 		return 1n;
 	}