Add support for PCM codecs in MP4, add 64-bit float PCM support

dev/convert.html

@@ -21,7 +21,7 @@
 			chunked: true,
 			chunkSize: 2**20
 		});
-		const outputFormat = new Metamuxer.OggOutputFormat();
+		const outputFormat = new Metamuxer.MovOutputFormat();
 
 		const button = document.createElement('button');
 		button.textContent = 'Cancel';
@@ -38,6 +38,7 @@
 				target
 			}),
 			audio: {
+				codec: 'pcm-f64'
 				//numberOfChannels: 1,
 				//sampleRate: 4000
 				//discard: true
@@ -85,7 +86,7 @@
 			},
 			trim: {
 				start: 0,
-				end: 3
+				end: 10
 			},
 		});
 		console.log(conversion);