No these are 2 different issues. WTV not working is related to an open issuer. This is a different issue which has broken the way ffmpeg deals with parsing wtv files which made mcebuddy incompatible with newer versions of ffmpeg. I've put a workaround
for this in 2.3.12. Now users can upgrade ffmpeg to the latest version manually and mcebuddy will be able to work with it.
The issue with ffmpeg creating wtv files which don't play back with mce still exists and if users lobby Peter Ross it may be fixes in future ffmpeg releases.
Hope this clarifies the topic.