# Ap4MdhdAtom.h File Reference

`#include "Ap4Atom.h"`
`#include "Ap4String.h"`

Go to the source code of this file.

## Classes
class | AP4_MdhdAtom
## Variables
const AP4_UI32 | AP4_MDHD_DEFAULT_GENERIC_TIMESCALE = 1000
const AP4_UI32 | AP4_MDHD_DEFAULT_VIDEO_TIMESCALE = 90000

## Variable Documentation

const AP4_UI32 AP4_MDHD_DEFAULT_GENERIC_TIMESCALE = 1000

Definition at line 41 of file Ap4MdhdAtom.h.

const AP4_UI32 AP4_MDHD_DEFAULT_VIDEO_TIMESCALE = 90000

Definition at line 42 of file Ap4MdhdAtom.h.