I want to convert a mkv to avi. When I extract the subtitle from the mkv it comes out corrupted. I use mkvtoolnix 2.1.0 with mkvextract 1.6.4.1. to extract. These are the newest versions as far as I know.
I use the converting method with VirtualDub, Avisynth, Haali media splitter, ffdshow, which opens the video and audio of the mkv but not the subtitles.
When I try to open the subtitle file in VirtualDub/video/filter/add.../TextSub/.ass it doesn't open. Subtitle workshop isn't able to open it either, it gives me an error message saying it's unssupported or corrupted.
I'm able to use ffdshow to filter the subs but it somehow makes the subs a bit blurrier than the original mkv.

Any way to make vsfilter work without textsub filter from gabest? Or is there maybe another mkvextractor that I might try? I would like to perserve the file as an .ass since it's got typesetting and colors and what not.