diff --git a/decoder.py b/decoder.py
index b5d198e..5b3178c 100644
--- a/decoder.py
+++ b/decoder.py
@@ -43,7 +43,7 @@ def find_corner(A, f):
     return np.average(np.where(mask), axis=1), np.average(A[mask], axis=0).astype(np.float64)
 
 
-if args.input.isdecimal():
+if isinstance(args.input, str) and args.input.isdecimal():
     args.input = int(args.input)
 cap = cv2.VideoCapture(args.input)
 data = None
diff --git a/encoder.py b/encoder.py
index ab0ab1e..dd3b53c 100644
--- a/encoder.py
+++ b/encoder.py
@@ -90,7 +90,7 @@ if args.mix:
         vidframe[hscale * (args.height - cheight) :, wscale * (args.width - cwidth) :] = 0
         frame = np.repeat(np.repeat(mkframe(packets[i]), hscale, 0), wscale, 1)
         # Set edges in original video to black
-        frame[(32 <= vidframe) & (vidframe < 224)] = 0
+        frame[vidframe % 255 != 0] = 0
         out.write(cv2.cvtColor(frame, cv2.COLOR_RGB2BGR))
         i = (i + 1) % len(packets)
 else: