void gf_isom_sample_entry_init(GF_SampleEntryBox *ent)
{
	ent->internal_type = GF_ISOM_SAMPLE_ENTRY_MP4S;
}
void gf_isom_sample_entry_init(GF_SampleEntryBox *ent)
{
	ent->internal_type = GF_ISOM_SAMPLE_ENTRY_MP4S;
}