Does using a mkv cotainer reduce the file size?

does using a mkv cotainer really reduce the file size or do u have to compress and reduce the quality/resolution to get a smaller video size.
Answer #1
the MKV container is just that, a container. Any differences in size are purely the result of the compression codec and settings used. As a general rule of thumb, lower size equals less pixel data per frame, which after a certain point reduces quality
Answer #2
tonyymmao replied: does using a mkv cotainer really reduce the file size or do u have to compress and reduce the quality/resolution to get a smaller video size.
Check my signature regarding MKV info and hopefully it will become clearer