Fix ffmpeg filter escaping

Author: redzic

av1an-core/src/ffmpeg.rs

@@ -210,11 +210,15 @@ pub fn escape_path_in_filter(path: impl AsRef<Path>) -> String {
       // https://stackoverflow.com/questions/60440793/how-can-i-use-windows-absolute-paths-with-the-movie-filter-on-ffmpeg
       .replace('\\', "/")
       .replace(':', r"\\:")
+      .replace('[', r"\[")
+      .replace(']', r"\]")
   } else {
     PathAbs::new(path.as_ref())
       .unwrap()
       .to_str()
       .unwrap()
+      .replace('[', r"\[")
+      .replace(']', r"\]")
       .to_string()
   }
   .replace(',', "\\,")