Add MPEG-TS muxer, fix a demuxer bug, remove Infinity from output format track counts

src/mpeg-ts/mpeg-ts-misc.ts

@@ -0,0 +1,29 @@
+/*!
+ * Copyright (c) 2025-present, Vanilagy and contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+export const TIMESCALE = 90_000; // MPEG-TS timestamps run on a 90 kHz clock
+export const TS_PACKET_SIZE = 188;
+
+export const enum MpegTsStreamType {
+	MP3_MPEG1 = 0x03,
+	MP3_MPEG2 = 0x04,
+	AAC = 0x0f,
+	AVC = 0x1b,
+	HEVC = 0x24,
+}
+
+export const buildMpegTsMimeType = (codecStrings: (string | null)[]) => {
+	let string = 'video/MP2T';
+
+	const uniqueCodecStrings = [...new Set(codecStrings.filter(Boolean))];
+	if (uniqueCodecStrings.length > 0) {
+		string += `; codecs="${uniqueCodecStrings.join(', ')}"`;
+	}
+
+	return string;
+};