How to accept BLOB data from MS SQL in MySQl?

Question

MySQL

The photo lies in MS SQL in the field of type IMAGE. You need to pass it to MySQL in a BLOB field.
Is the MySQL function correctly written, which is called on the MS SQL side to write to MySQL:

CREATE FUNCTION insert_photo(_img BLOB) RETURNS INT
BEGIN
INSERT INTO Photo(img) VALUE(_img);
return LAST_INSERT_ID();
END

Or is it impossible to transfer BLOB data this way and you need to use, for example, encoding IMAGE -> BASE64 -> BLOB ?