diff --git a/Startup/file_validation.py b/Startup/file_validation.py
new file mode 100644
index 0000000..5e78a6e
--- /dev/null
+++ b/Startup/file_validation.py
@@ -0,0 +1,23 @@
+#!/bin/env python
+import numpy as np
+
+
+def process_inputs(inputs):
+    # Check input file for being valid
+    if not inputs:
+        print('No input file')
+        exit()
+
+    if inputs[0].is_dir():
+        inputs = [x for x in inputs[0].iterdir() if x.suffix in (".mkv", ".mp4", ".mov", ".avi", ".flv", ".m2ts")]
+
+    valid = np.array([i.exists() for i in inputs])
+
+    if not all(valid):
+        print(f'File(s) do not exist: {", ".join([str(inputs[i]) for i in np.where(not valid)[0]])}')
+        exit()
+
+    return inputs
+
+
+