diff --git a/cmdutils.c b/cmdutils.c
index d5a2cbea6b..050b992984 100644
--- a/cmdutils.c
+++ b/cmdutils.c
@@ -2249,6 +2249,9 @@ double get_rotation(AVStream *st)
 
     theta -= 360*floor(theta/360 + 0.9/360);
 
+    if (fabs(theta - 90*round(theta/90)) > 2)
+        av_log_ask_for_sample(NULL, "Odd rotation angle\n");
+
     return theta;
 }