Fix incorrectly processed timestamps for fragmented MP4

dev/convert.html

@@ -21,7 +21,7 @@
 			chunked: true,
 			chunkSize: 2**20
 		});
-		const outputFormat = new Metamuxer.Mp4OutputFormat();
+		const outputFormat = new Metamuxer.Mp4OutputFormat({ fastStart: 'fragmented' });
 
 		const button = document.createElement('button');
 		button.textContent = 'Cancel';
@@ -41,7 +41,7 @@
 				//numberOfChannels: 1,
 				//sampleRate: 4000
 				//discard: true
-				forceReencode: true,
+				//forceReencode: true,
 			},
 			/*
 			video: {
@@ -72,7 +72,7 @@
 				//width: 1280,
 				//discard: true,
 				//width: 640
-				forceReencode: true,
+				//forceReencode: true,
 				//rotate: 90
 				//width: 720 ?? 2160,
 				//height: 1280 ?? 3840,
@@ -85,7 +85,7 @@
 			},
 			trim: {
 				start: 0,
-				end: 40
+				end: 3
 			},
 		});
 		console.log(conversion);