The embodiment of the invention discloses a video de-interlacing method and a device and a corresponding video processing method and device. An intra-field interpolation direction and an inter-field interpolation direction are estimated in a color/luminance separated color space, and a pixel value of the current interpolation point is computed by combining the pixel points on the estimated intra-field interpolation direction and inter-field interpolation direction, thereby enabling the misinsertion probability on the interpolation direction to lower to the minimum, and the chattering phenomena can be effectively removed.