Fix TS probing by requiring 2-3 packet start bytes to be matched

Fixes #5501
video-dev · May 24, 2023 · c969f6c · c969f6c
1 parent a58ce98
commit c969f6c
Showing 1 changed file with 12 additions and 1 deletion.
diff --git a/src/demux/tsdemuxer.ts b/src/demux/tsdemuxer.ts
@@ -111,7 +111,18 @@ class TSDemuxer implements Demuxer {
           if (!foundPat && parsePID(data, j) === 0) {
             foundPat = true;
           }
-          if (foundPat && j + PACKET_LENGTH > scanwindow) {
+          if (
+            foundPat &&
+            j + PACKET_LENGTH > scanwindow &&
+            data[j + PACKET_LENGTH] === 0x47
+          ) {
+            // If length supports 3 packets, confirm
+            if (
+              length > j + PACKET_LENGTH * 2 &&
+              data[j + PACKET_LENGTH * 2] !== 0x47
+            ) {
+              return -1;
+            }
             return i;
           }
         } else {