Patch implements better way to control playback speed than it is possible
to do with speed effect.
There are 2 layers of control:
- Option to retime movie to match scene FPS rate.
- Custom speed factor to control playback rate.
Since playback rate is strip property, it is now possible to manipulate
strip as normal one even if it is retimed.
To facilitate manipulation, some functions need to consider speed factor
and apply necessary corrections to strip offset or strip start. These
corrections may need to be float numbers, so start and offsets must be
float as well.
Sound strips now use speed factor instead of pitch. This means, that strips
will change length to match real length. In addition, it is possible to group
movie and sound strip and change speed of meta strip.