The present invention relates to a method for modifying a binary video stream encoded according to a video coding algorithm comprising a prediction loop and in-loop post-filtering integrated in the prediction loop. The method comprises the following steps performed by a device: seeking a syntax element relating to the in-loop post-filtering in the binary video stream, the syntax element being used by a decoding device for controlling a complexity of implementation of the in-loop post-filtering; modifying (321, 323, 325) a value of the syntax element or eliminating (321, 323, 325) the syntax element.