fix: add codec_name check for attached pictures

src/utils/mediaUtils.test.ts

@@ -44,6 +44,17 @@ describe('utils/mediaUtils.ts', () => {
     expect(isAttachedPic(validVideo)).toBe(false);
   });
 
+  test('isAttachedPic should handle undefined or malformed codec_name safely', () => {
+    const malformedStream = { 
+      index: 6, 
+      codec_type: 'video', 
+      codec_name: undefined 
+    } as any;
+
+    expect(() => isAttachedPic(malformedStream)).not.toThrow();
+    expect(isAttachedPic(malformedStream)).toBe(false);
+  });
+
   test('isGarbageStream should group image subtitles and cover art as garbage', () => {
     expect(isGarbageStream(imageSubPGS)).toBe(true);
     expect(isGarbageStream(coverArtAttached)).toBe(true);

src/utils/mediaUtils.ts

@@ -9,7 +9,10 @@ export const isImageSubtitle = (codecName: string | undefined): boolean => {
 };
 
 export const isAttachedPic = (stream: Pick<MediaStream, 'disposition' | 'codec_name'>): boolean => {
-  return stream.disposition?.attached_pic === 1 || ATTACHED_PIC_CODECS.has(stream.codec_name.toLowerCase());
+  return (
+    stream.disposition?.attached_pic === 1 || 
+    (!!stream.codec_name && ATTACHED_PIC_CODECS.has(stream.codec_name.toLowerCase()))
+  );
 };
 
 export const isGarbageStream = (stream: MediaStream): boolean => {