int mov_write_dref_tag(ByteIOContext *pb)
static int mov_write_dref_tag(ByteIOContext *pb)
int mov_write_dref_tag(ByteIOContext *pb){    put_be32(pb, 28); /* size */    put_tag(pb, "dref");    put_be32(pb, 0); /* version & flags */    put_be32(pb, 1); /* entry count */    put_be32(pb, 0xc); /* size */    put_tag(pb, "url ");    put_be32(pb, 1); /* version & flags */    return 28;}