Add track name support

src/input-track.ts

@@ -30,6 +30,7 @@ export type PacketStats = {
 export interface InputTrackBacking {
 	getId(): number;
 	getCodec(): MediaCodec | null;
+	getName(): string | null;
 	getLanguageCode(): string;
 	getTimeResolution(): number;
 	getFirstTimestamp(): Promise<number>;
@@ -89,6 +90,11 @@ export abstract class InputTrack {
 		return this._backing.getLanguageCode();
 	}
 
+	/** A user-defined name for this track. */
+	get name() {
+		return this._backing.getName();
+	}
+
 	/**
 	 * A positive number x such that all timestamps and durations of all packets of this track are
 	 * integer multiples of 1/x.