CHANGELOG.md in format_parser-1.2.0 vs CHANGELOG.md in format_parser-1.2.1

@@ -1,4 +1,7 @@
+## 1.2.1
+* Resolve bug when `stts` atom is `nil`
+
 ## 1.2.0
 * Add support for `codecs` in moov_parser for video metadata
 
 ## 1.1.0
 * Add support for `frame_rate` in moov_parser