def computeOpticalFlows(self, targetRgb, sourceRgbs):
		print(sourceRgbs.shape)
		MB, seqSize, _, height, width = sourceRgbs.shape
		firstResult = self.opticalFlowNet(targetRgb, sourceRgbs[:, 0])
		results = [tr.zeros(MB, seqSize, 2, h, w).to(device) for (h, w) in map(lambda x : x.shape[2 : 4], firstResult)]
		for scaleIx in range(len(results)):
			results[scaleIx][:, 0] = firstResult[scaleIx]

		for i in range(1, seqSize):
			res = self.opticalFlowNet(targetRgb, sourceRgbs[:, i])
			for scaleIx in range(len(results)):
				results[scaleIx][:, i] = res[scaleIx]
		return results