void gf_isom_video_sample_entry_init(GF_VisualSampleEntryBox *ent)
{
	gf_isom_sample_entry_init((GF_SampleEntryBox*)ent);
	ent->internal_type = GF_ISOM_SAMPLE_ENTRY_VIDEO;
	ent->horiz_res = ent->vert_res = 0x00480000;
	ent->frames_per_sample = 1;
	ent->bit_depth = 0x18;
	ent->color_table_index = -1;
}
void gf_isom_video_sample_entry_init(GF_VisualSampleEntryBox *ent)
{
	gf_isom_sample_entry_init((GF_SampleEntryBox*)ent);
	ent->internal_type = GF_ISOM_SAMPLE_ENTRY_VIDEO;
	ent->horiz_res = ent->vert_res = 0x00480000;
	ent->frames_per_sample = 1;
	ent->bit_depth = 0x18;
	ent->color_table_index = -1;
}