1. An apparatus, comprising: a down-sampler and metadata generator for receiving high resolution pictures and generating low resolution pictures and metadata there from, the metadata for guiding post-decoding post-processing of the low resolution pictures and the metadata; and at least one encoder for encoding the low resolution pictures and the metadata, wherein the metadata comprises motion transformation information relating to motion between two or more of the high resolution pictures and sampling grid indices, and wherein the high resolution pictures include at least one reference picture and one or more non-reference pictures, and the down-sampler and metadata generator generate the low resolution pictures by estimating motion from a reference picture to each of the one or more non-reference pictures, selecting one or more down-sampling grids from a plurality of candidate down-sampling grids for use in down-sampling the high resolution pictures based on the motion information, and down-sampling the high resolution pictures using the one or more down-sampling grids.