Update params

app/routers/videos.py

@@ -156,14 +156,17 @@ async def stream_video(video_id: str, current_user: dict = Depends(is_user)):
         ffmpeg_command = [
             'ffmpeg',
             '-i', full_path,
+            '-map', '0:v:0',
+            '-map', '0:a?',
             '-movflags', 'frag_keyframe+empty_moov+omit_tfhd_offset+frag_discont+default_base_moof',
             '-f', 'mp4',
             '-codec:v', 'libx264',
             '-preset', 'ultrafast',
             '-crf', '28',
             '-codec:a', 'aac',
+            '-filter_complex', 'amerge',
+            '-ac', '2',
             '-b:a', '128k',
-            '-map', '0:a',
             '-loglevel', 'warning',
             '-hide_banner',
             'pipe:1'