int mov_write_vmhd_tag(ByteIOContext *pb)
static int mov_write_vmhd_tag(ByteIOContext *pb)
int mov_write_vmhd_tag(ByteIOContext *pb){    put_be32(pb, 0x14); /* size (always 0x14) */    put_tag(pb, "vmhd");    put_be32(pb, 0x01); /* version & flags */    put_be64(pb, 0); /* reserved (graphics mode = copy) */    return 0x14;}