diff --git a/todo.txt b/todo.txt
index 6afd86e..b4ea554 100644
--- a/todo.txt
+++ b/todo.txt
@@ -2,4 +2,5 @@
 - https://github.com/Vanilagy/mp4-muxer/issues/83 tell him it's possible now
 - is this fixed? https://github.com/Vanilagy/webm-muxer/issues/50
 - cross-track offset for streaming sources
-- configurable fragmented mp4 fragment size, like the mp4-muxer PR
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+- configurable fragmented mp4 fragment size, like the mp4-muxer PR
+- fix rotation matrix thing, make sure its counter-clockwise everywhere (is this a breaking change from mp4-muxer?)
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