1. A method of controlling a video content system based on an input video sequence and a corresponding degraded video sequence, the input video sequence including at least a current input frame and a preceding input frame, and the degraded video sequence including at least a current degraded frame and a preceding degraded frame, the method comprising: obtaining the current input frame, the preceding input frame, the current degraded frame and the preceding degraded frame; computing a first differences value from the current input and the preceding input frames and a second differences value from the current degraded frame and the preceding degraded frame; comparing the first and second differences values giving rise to an inter-frame quality score; computing an intra-frame quality score using an intra-frame quality measure that is applied in the pixel-domain of the current degraded frame and the current input frame; and providing a configuration instruction to the video content system based on a quality criterion related to the inter-frame and the intra-frame quality scores; wherein the degraded video sequence is a compressed video sequence corresponding to the input video sequence, providing a compression parameter value, wherein: said obtaining comprises, obtaining a candidate compressed frame generated from a current input frame according to the compression parameter value and for each current input frame and candidate compressed frame providing a stored compressed frame corresponding to the preceding input frame; wherein said computing a first differences value comprises computing a first differences value from the current input and the preceding input frames, and wherein said computing a second differences value comprises computing a second differences value from the candidate compressed frame and the stored compressed frame, and comparing the first and second differences values giving rise to an inter-frame quality score; wherein said computing an intra-frame quality score comprises computing an intra-frame quality using an intra-frame quality measure that is applied in the pixel-domain of the candidate compressed frame and the current input frame, and wherein in case a quality criterion related to inter-frame and intra-frame quality is not satisfied, instructing the video encoder to repeat a compression process using an updated compression parameter value giving rise to an updated candidate compressed frame and computing the inter-frame quality score and the intra-frame quality score based on the updated candidate compressed frame, and computing a frame quality score for the current candidate compressed frame based on the intra-frame and the inter-frame quality scores, and wherein the quality criterion is related to the frame quality score.