diff --git a/mp4-tree.js b/mp4-tree.js
index a19fb80..e99b888 100644
--- a/mp4-tree.js
+++ b/mp4-tree.js
@@ -43,6 +43,8 @@ class MP4Tree {
 	parse_codecs() {
 		this.parse_into('moov', 8);
 		// loop over all traks (can handle pure audio, pure video, both, multiple)
+		// only doing h264 video since thats all I can check currently doing 
+		// transcoding and running obs together with cpu usage
 		while (this.idx < this.data.byteLength) {
 			if (!this.parse_until('trak')) { // if no more tracks in file
 				break;
@@ -60,6 +62,8 @@ class MP4Tree {
 					this.parse_avc1();
 				} else if (media_sample == 'mp4a') {
 					this.parse_mp4a();
+				} else {
+					this.codecs.push('unsup codec');
 				}
 			}
 			this.idx = curr_track_end; // always skip to end of current processed track