fix: look at all program map tables for ts stream types (#28)

use of maxPes in `m2ts-helpers#parseTs` is deprecated. We should always look at all pes packets to prevent being caught off guard by changes in that stream that happen after the pes specified.

src/format-parser.js

@@ -218,7 +218,7 @@ const parseCodecFrom = {
  },
 
  ts(bytes) {
- const result = parseTs(bytes, 2);
+ const result = parseTs(bytes);
  const codecs = {};
 
  Object.keys(result.streams).forEach(function(esPid) {

src/m2ts-helpers.js

@@ -1,6 +1,9 @@
 import {bytesMatch, toUint8} from './byte-helpers.js';
 const SYNC_BYTE = 0x47;
 
+// use of maxPes is deprecated as we should always look at
+// all pes packets to prevent being caught off gaurd by changes
+// in that stream that happen after the pes specified
 export const parseTs = function(bytes, maxPes = Infinity) {
  bytes = toUint8(bytes);
 
@@ -27,14 +30,14 @@ export const parseTs = function(bytes, maxPes = Infinity) {
 
  if (pid === 0 && !pmt.pid) {
  pmt.pid = (packet[payloadOffset + 10] & 0x1f) << 8 | packet[payloadOffset + 11];
- } else if (pmt.pid && pid === pmt.pid && !pmt.streams) {
+ } else if (pmt.pid && pid === pmt.pid) {
  const isNotForward = packet[payloadOffset + 5] & 0x01;
 
  // ignore forward pmt delarations
  if (!isNotForward) {
  continue;
  }
- pmt.streams = {};
+ pmt.streams = pmt.streams || {};
 
  const sectionLength = (packet[payloadOffset + 1] & 0x0f) << 8 | packet[payloadOffset + 2];
  const tableEnd = 3 + sectionLength - 4;