Timewarp Producer Issue: Ignores framerate settings in mlt_profile, reports wrong frame on callback.

I've been trying to use a timewarp producer to allow for fast-forward and slow-motion features in my current application and noticed some issues after hot swapping my existing producer (avformat) with a timewarp producer wrapping my original producer.

Firstly, I noticed that my callback consumer-frame-show no longer respects my current frame rate settings (i.e. when I change my profile to 4 frames per second, I still get 24 frame show callbacks a second that I have to deal with) which is causing some parts of my application to not respect the target framerate settings. I've even tried to reassign the profile after changes to frame-rate, but it would still always callback 24 times a second.

Secondly, I want to know if there's a good way to discern the position of the frame relative to the internal producer (the avformat producer) from within the consumer-frame-show callback. I've noticed that the timewarp obviously changes the frame's "position" to report the position of the timewarp producer. While I could perhaps discern the position using a simple multiplication (timewarp warp_speed value * frame position) I can't help but wonder if there's a better way to do this.

Start by reproducing the behavior with a timewarp producer wrapping an avformat producer, using mlt_profile frame-rate settings and the consumer-frame-show callback. Trace the timewarp producer's frame position and callback timing, then verify that the callback rate follows the profile and that the internal producer position can be identified.