Checked out the logs, noticed one thing about the video stream - not sure how relevant it is but the stream does have an issue:
2018-06-16T21:41:23 MCEBuddy.AppWrapper.Base → [mpeg2video @ 000000000053ad60] Invalid frame dimensions 0x0.
That being said, for DVR-MS, MCEBuddy has windows directshow codecs process and extract the raw video and audio files.
In your case, the windows codes are only returning the first 25% of the file. That most likely means that the file has an EOF (end of file) marker in there around the 25% mark and windows thinks it’s the end of the stream. This usually means a faulty tv tuner/recording driver (it happens with some buggy drivers). Try to update your driver.
There are other way MCEBuddy can extract the steams but those will kick in only if the windows stream codecs “fail”, in this case it doesn’t fail but it’s returning a success code with only 25% of the stream likely due to the EOF.
If you can upload the original DVR-MS file we can check it out.