Video encoding device (10, 10') for encoding video data comprising: i) a first encoder for encoding input video data according to a first encoding scheme and outputting first coded video data, wherein PPG relevant information is lost during encoding and the first coded video data have a lower quality than the input video data with respect to the extraction of a PPG signal, ii) a second encoder for encoding input video data according to a second encoding scheme preserving PPG-relevant information and outputting second coded video data, said second encoder comprising: - a decoding unit for decoding said first coded video data, in particular according to a decoding scheme complementary to said first encoding scheme, and outputting intermediate video data, - a subtraction unit for forming difference video data by determining the difference between said intermediate video data and said input video data, - a selection unit for selecting in said difference video data a skin area as region of interest providing the strongest PPG signal, said selecting being performed by use of obtained ROI information corresponding to the location of said region of interest or based on an image analysis of the intermediate video data in the selection unit, and - an encoding unit (35, 35') for encoding said selected region of interest of said difference video data and outputting it as said second coded video data, wherein said encoding unit (35, 35') is adapted for encoding only chrominance components of said selected region of interest in said difference video data or for encoding only DC components of inter- or intra-blocks of the chrominance components of said selected region of interest in said difference video data. i) a first encoder for encoding input video data according to a first encoding scheme and outputting first coded video data, wherein PPG relevant information is lost during encoding and the first coded video data have a lower quality than the input video data with respect to the extraction of a PPG signal, ii) a second encoder for encoding input video data according to a second encoding scheme preserving PPG-relevant information and outputting second coded video data, said second encoder comprising: - a decoding unit for decoding said first coded video data, in particular according to a decoding scheme complementary to said first encoding scheme, and outputting intermediate video data, - a subtraction unit for forming difference video data by determining the difference between said intermediate video data and said input video data, - a selection unit for selecting in said difference video data a skin area as region of interest providing the strongest PPG signal, said selecting being performed by use of obtained ROI information corresponding to the location of said region of interest or based on an image analysis of the intermediate video data in the selection unit, and - an encoding unit (35, 35') for encoding said selected region of interest of said difference video data and outputting it as said second coded video data, wherein said encoding unit (35, 35') is adapted for encoding only chrominance components of said selected region of interest in said difference video data or for encoding only DC components of inter- or intra-blocks of the chrominance components of said selected region of interest in said difference video data. - a decoding unit for decoding said first coded video data, in particular according to a decoding scheme complementary to said first encoding scheme, and outputting intermediate video data, - a subtraction unit for forming difference video data by determining the difference between said intermediate video data and said input video data, - a selection unit for selecting in said difference video data a skin area as region of interest providing the strongest PPG signal, said selecting being performed by use of obtained ROI information corresponding to the location of said region of interest or based on an image analysis of the intermediate video data in the selection unit, and - an encoding unit (35, 35') for encoding said selected region of interest of said difference video data and outputting it as said second coded video data, wherein said encoding unit (35, 35') is adapted for encoding only chrominance components of said selected region of interest in said difference video data or for encoding only DC components of inter- or intra-blocks of the chrominance components of said selected region of interest in said difference video data.