Fixed
- mvhd, tkhd, and mdhd timestamps were off by one day
- allow other sbgp and sgpd types than seig with senc
Added
- mvhd, tkhd, and mdhd methods to set and get creation and modification times
- Event Message boxes evte, emib, emeb
- GetBtrt method to StsdBox
- Btrt pointer attribute in AudioSampleEnntry
- stpp can be used as value to CreateEmptyTrak