A method (300, 400) performed at an electronic device having a display, the method comprising: determining (304, 404) by the electronic device the height and width for a preferred input picture size of the electronic device; receiving (302, 402) by the electronic device data defining first and second output picture sizes from a second electronic device, wherein the data defining the first output picture size includes the height and width of the first output picture size and the data defining the second output picture size includes the height and width of the second output picture size; calculating (306, 408) by the electronic device a first value calculated based on a weighted sum of one or more parameter mismatches, wherein each parameter mismatch is calculated as one of a difference or a ratio between one of the height and width of the preferred input picture size and a corresponding one of the height and width of the first output picture size, the first value defining one of a first degree of mismatch or a first degree of similarity between the preferred input picture size and the first output picture size; calculating (306, 408) by the electronic device a second value calculated based on a weighted sum of one or more parameter mismatches, wherein each parameter mismatch is calculated as one of a difference or a ratio between one of the height and width of the preferred input picture size and a corresponding one of the height and width of the second output picture size, the second value defining one of a second degree of mismatch or a second degree of similarity between the preferred input picture size and the second output picture size; comparing by the electronic device the first and second values so as to determine the value corresponding to one of a lowest degree of mismatch between the first and second degrees of mismatch or a highest degree of similarity between the first and second degrees of similarity; selecting (308, 412) by the electronic device one of the first and second output picture sizes based on the comparison between the first and second values, wherein the selected output picture size has the lowest degree of mismatch or highest degree of similarity with the preferred input picture size; providing (310, 414) by the electronic device the selected output picture size to the second electronic device; receiving (312, 416) by the electronic device a video stream from the second electronic device, wherein the video stream has a picture size corresponding to the selected output picture size; and scaling by the electronic device the received video stream to a height and width of a second input picture size of the electronic device. determining (304, 404) by the electronic device the height and width for a preferred input picture size of the electronic device; receiving (302, 402) by the electronic device data defining first and second output picture sizes from a second electronic device, wherein the data defining the first output picture size includes the height and width of the first output picture size and the data defining the second output picture size includes the height and width of the second output picture size; calculating (306, 408) by the electronic device a first value calculated based on a weighted sum of one or more parameter mismatches, wherein each parameter mismatch is calculated as one of a difference or a ratio between one of the height and width of the preferred input picture size and a corresponding one of the height and width of the first output picture size, the first value defining one of a first degree of mismatch or a first degree of similarity between the preferred input picture size and the first output picture size; calculating (306, 408) by the electronic device a second value calculated based on a weighted sum of one or more parameter mismatches, wherein each parameter mismatch is calculated as one of a difference or a ratio between one of the height and width of the preferred input picture size and a corresponding one of the height and width of the second output picture size, the second value defining one of a second degree of mismatch or a second degree of similarity between the preferred input picture size and the second output picture size; comparing by the electronic device the first and second values so as to determine the value corresponding to one of a lowest degree of mismatch between the first and second degrees of mismatch or a highest degree of similarity between the first and second degrees of similarity; selecting (308, 412) by the electronic device one of the first and second output picture sizes based on the comparison between the first and second values, wherein the selected output picture size has the lowest degree of mismatch or highest degree of similarity with the preferred input picture size; providing (310, 414) by the electronic device the selected output picture size to the second electronic device; receiving (312, 416) by the electronic device a video stream from the second electronic device, wherein the video stream has a picture size corresponding to the selected output picture size; and scaling by the electronic device the received video stream to a height and width of a second input picture size of the electronic device.