diff --git a/dziurkacz-fast.mjs b/dziurkacz-fast.mjs
index 36bc184..a3943fd 100755
--- a/dziurkacz-fast.mjs
+++ b/dziurkacz-fast.mjs
@@ -127,7 +127,7 @@ const ns = range(pieces.length);
 
 const sample_rate = parseInt(
   (
-    await $`ffprobe ${args[0]} 2>&1 | grep 'Audio:' | grep --only-matching --extended-regexp '[0-9]+ Hz' | sed 's/ Hz//'`
+    await $`ffprobe ${video} 2>&1 | grep 'Audio:' | grep --only-matching --extended-regexp '[0-9]+ Hz' | sed 's/ Hz//'`
   ).stdout
 ); // in Hz