When the size of HDD's became larger and more affordable I decided not to bother encoding my DVD's. Nowadays I re-mux their original, video, audio and subtitle streams along with chapters into the .mkv container. I do the same with Blu-ray disc back-ups too ;)
--------------------- Follow me on Instragram @bassrebel 2003 2014 X1 X3.5i 2016 MB C300 4Matic
What devices are you using to play and display your (MPEG-2) .MKV contained files? Depending on how the MPEG-2 stream has been encoded and flagged there maybe things you can do with some of your DVD back-up files...
I'm using LightAlloy on a 21 inch lcd panel. TBH DVD originals are also poor quality, but an MP4 that a friend gave me which was a full DVD compressed into 800 meg was ace quality, so it's not the screen, it's DVD's. I expected more from them tbh
--------------------- 2002 M Coupe Estorilblau 368S/74