Video coding and decoding model processing method, video coding and decoding method and related equipment

The invention relates to a video coding and decoding model processing method, a video coding and decoding method and related equipment. The video coding and decoding model processing method comprises the following steps: acquiring a training video frame, extracting a feature map of the training video frame through a video coding and decoding model, and determining a scale parameter value corresponding to a feature element in the feature map; according to a preset mapping relation between the scale parameter values and scale parameter mapping values, mapping each scale parameter value into a preset mapping value range to obtain a corresponding scale parameter mapping value; obtaining a constraint reference mapping value corresponding to each scale parameter mapping value, and determining the quantization constraint loss of the training video frame based on the difference between each scale parameter mapping value and the corresponding constraint reference mapping value; and updating at least a part of model pa