+
+\section{More musings}
+
+In version 2 things we changed, and a problem appeared. We have / had
+\texttt{ContentTime} which is a metric time type, and it is used to
+describe video content length (amongst other things). However if we
+load a set of TIFFs and then change the frame rate we don't have the
+length in frames i order to work out the new rate.
+
+This suggests that the content lengths, at least, should be described
+in frames. Then to get metric lengths you would need to specify a
+timecode.
+
+I will probably have to try a frame-based ContentTime and see what
+problems arise.
+