GF_Err mp4s_Write(GF_Box *s, GF_BitStream *bs)
{
	GF_Err e;
	GF_MPEGSampleEntryBox *ptr = (GF_MPEGSampleEntryBox *)s;

	e = gf_isom_box_write_header(s, bs);
	if (e) return e;
	gf_bs_write_data(bs, ptr->reserved, 6);
	gf_bs_write_u16(bs, ptr->dataReferenceIndex);
	e = gf_isom_box_write((GF_Box *)ptr->esd, bs);
	if (e) return e;
	return gf_isom_box_array_write(s, ptr->protections, bs);
}
Unknown