Fall back to default timescale when not provided by the Matroska file

examples/metadata-extraction/metadata-extraction.ts

@@ -129,6 +129,8 @@ const renderObject = (object: Record<string, unknown>) => {
 				listItem.removeChild(loadingSpan);
 				listItem.appendChild(renderValue(resolvedValue));
 			}).catch((error) => {
+				console.error(error);
+
 				// Show the promise error
 				listItem.removeChild(loadingSpan);
 				const errorSpan = document.createElement('span');

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "mediabunny",
-  "version": "1.4.0",
+  "version": "1.4.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "mediabunny",
-      "version": "1.4.0",
+      "version": "1.4.1",
       "license": "MPL-2.0",
       "dependencies": {
         "@types/dom-mediacapture-transform": "^0.1.11",

package.json

@@ -1,7 +1,7 @@
 {
   "name": "mediabunny",
   "author": "Vanilagy",
-  "version": "1.4.0",
+  "version": "1.4.1",
   "description": "Pure TypeScript media toolkit for reading, writing, and converting media files, directly in the browser.",
   "type": "module",
   "main": "./dist/bundles/mediabunny.cjs",

src/matroska/matroska-demuxer.ts

@@ -368,6 +368,13 @@ export class MatroskaDemuxer extends Demuxer {
 			this.readContiguousElements(this.metadataReader, size);
 		}
 
+		if (this.currentSegment.timestampScale === -1) {
+			// TimestampScale element is missing. Technically an invalid file, but let's default to the typical value,
+			// which is 1e6.
+			this.currentSegment.timestampScale = 1e6;
+			this.currentSegment.timestampFactor = 1e9 / 1e6;
+		}
+
 		// Put default tracks first
 		this.currentSegment.tracks.sort((a, b) => Number(b.isDefault) - Number(a.isDefault));