CMD list handled differently when shell=True

utils/interpolate.py

@@ -43,15 +43,18 @@ def _interpolate(
     cmd = [
         "vspipe", 
         "-c", "y4m",
-        vapoursynth_file,
+        f'"{vapoursynth_file}"',
         "-", "|",
         "ffmpeg", "-v", "quiet", "-stats",
         "-i", "-",
         "-c:v", "hevc_nvenc",
         "-qp", "5",
-        interpolate_output
+        f'"{interpolate_output}"'
     ]
 
+    if sys.platform == 'linux':
+        cmd = ' '.join(cmd)
+
     try:
         subprocess.run(cmd, shell=True, check=True)
     except subprocess.CalledProcessError as e: