Request: Avoid using list of Bitmaps stored (causes app to crash when there are too many), and also allow to set duration of each frame

[AndroidDeveloperLB]

As the title says. It seems this library doesn't have either of these. Storing so many bitmaps and only then encode - this is a recipe for memory issues, and this library is for Android... Also, frames in a video can take different amount of duration. Please add this too