The macro defined namespaces confused the hell out of lupdate and more or less broke translations permanently. Looks like the only way we can do it is to have a hardcoded namespace, which goes against my instinct, but honestly how likely is it that we'll change the namespace anyway (I guess forks might want to do it, but that's their problem ;) )
Add a frame rate option to the conversion to opentime rationals as
otio generaly expects rationals to be in the form value/framerate.
Also add a check to make sure the rational is not in the form 0/0
as this can cause errors with OTIO.
Old code (imported from elsewhere) has been cleaned up significantly, made more
understandable/maintainable, and conformed to the rest of the code style.
`rational` is supposed to "fix signs" and "reduce" whenever its values are set,
but I neglected to do this when its values were set by an AVRational. Now it
will do so on both.
An earlier commit implementing media in and out parameters was primarily for
this addition. A simple control dialog for the clip's speed presentation
reimplemented from the old codebase.