diff --git a/src/main.py b/src/main.py
index 20c326b..c4107e1 100644
--- a/src/main.py
+++ b/src/main.py
@@ -42,14 +42,24 @@ def main():
         print(f"Error: '{input_file_path}' is not a file.", file=sys.stderr)
         sys.exit(1)
 
+    if not os.access(input_file_path, os.R_OK):
+        print(f"Error: No read permission for input file '{input_file_path}'.", file=sys.stderr)
+        sys.exit(1)
+
     output_dir = args.output_dir
     if output_dir:
         output_dir = os.path.abspath(output_dir)
         if not os.path.isdir(output_dir):
             print(f"Error: Output directory '{output_dir}' does not exist or is not a directory.", file=sys.stderr)
             sys.exit(1)
+        if not os.access(output_dir, os.W_OK):
+            print(f"Error: No write permission for output directory '{output_dir}'.", file=sys.stderr)
+            sys.exit(1)
     else:
         output_dir = os.path.dirname(input_file_path)
+        if not os.access(output_dir, os.W_OK):
+            print(f"Error: No write permission for input file's directory '{output_dir}'.", file=sys.stderr)
+            sys.exit(1)
 
     # Perform conversion
     print(f"Starting conversion for {input_file_path}...")
diff --git a/src/utils.py b/src/utils.py
index ea51d91..6d9f99b 100644
--- a/src/utils.py
+++ b/src/utils.py
@@ -15,10 +15,16 @@ def get_video_info(file_path):
     ]
     try:
         result = subprocess.run(command, capture_output=True, text=True, check=True)
+        # Filter out known non-critical ffprobe stderr messages
+        filtered_stderr = "\n".join([line for line in result.stderr.splitlines() if not ("mpp_soc" in line or "mpp_platform" in line)])
+        if filtered_stderr:
+            print(f"ffprobe Stderr: {filtered_stderr}", file=sys.stderr)
         return json.loads(result.stdout)
     except subprocess.CalledProcessError as e:
+        filtered_stderr = "\n".join([line for line in e.stderr.splitlines() if not ("mpp_soc" in line or "mpp_platform" in line)])
         print(f"Error running ffprobe: {e}", file=sys.stderr)
-        print(f"Stderr: {e.stderr}", file=sys.stderr)
+        if filtered_stderr:
+            print(f"ffprobe Stderr: {filtered_stderr}", file=sys.stderr)
         return None
     except FileNotFoundError:
         print("Error: ffprobe not found. Please ensure FFmpeg is installed and in your PATH.", file=sys.stderr)
@@ -29,8 +35,8 @@ def get_audio_info(file_path):
     command = [
         'ffprobe',
         '-v', 'error',
-        '-select_streams', 'a:0',
-        '-show_entries', 'stream=codec_name,sample_rate,channels,bit_rate',
+        '-select_streams', 'v:0',
+        '-show_entries', 'stream=codec_name,width,height,avg_frame_rate,duration_ts,bit_rate,pix_fmt',
         '-of', 'json',
         file_path
     ]