Your source video is corrupted and has sync issues from which ffmpeg is unable to recover:
2019-06-23T18:36:05 MCEBuddy.AppWrapper.FFmpeg → [mpegts @ 0000014af929a920] PES packet size mismatch
2019-06-23T18:36:05 MCEBuddy.AppWrapper.FFmpeg → Last message repeated 2 times
2019-06-23T18:36:05 MCEBuddy.AppWrapper.FFmpeg → [mpegts @ 0000014afcbdc7a0] Non-monotonous DTS in output stream 0:2; previous: 30718800, current: 30715920; changing to 30718801. This may result in incorrect timestamps in the output file.
2019-06-23T18:36:05 MCEBuddy.AppWrapper.FFmpeg → [mpegts @ 0000014af929a920] PES packet size mismatch
2019-06-23T18:36:05 MCEBuddy.AppWrapper.FFmpeg → Last message repeated 15 times
2019-06-23T18:36:05 MCEBuddy.AppWrapper.FFmpeg → [mpegts @ 0000014af929a920] Invalid timestamps stream=0, pts=5396043679, dts=5396103209, size=3661
2019-06-23T18:36:05 MCEBuddy.AppWrapper.FFmpeg → [mpegts @ 0000014afcbdc7a0] Invalid DTS: 31001754 PTS: 30942224 in output stream 0:0, replacing by guess
2019-06-23T18:36:05 MCEBuddy.AppWrapper.FFmpeg → [mpegts @ 0000014af929a920] PES packet size mismatch
2019-06-23T18:36:05 MCEBuddy.AppWrapper.FFmpeg → Last message repeated 1 times
2019-06-23T18:36:05 MCEBuddy.AppWrapper.FFmpeg → [mpegts @ 0000014afcbdc7a0] Non-monotonous DTS in output stream 0:0; previous: 31022775, current: 31016769; changing to 31022776. This may result in incorrect timestamps in the output file.
2019-06-23T18:36:05 MCEBuddy.AppWrapper.FFmpeg → [mpegts @ 0000014afcbdc7a0] Non-monotonous DTS in output stream 0:0; previous: 31022776, current: 31019772; changing to 31022777. This may result in incorrect timestamps in the output file.
2019-06-23T18:36:05 MCEBuddy.AppWrapper.FFmpeg → [mpegts @ 0000014af929a920] PES packet size mismatch
2019-06-23T18:36:05 MCEBuddy.AppWrapper.FFmpeg → [mpegts @ 0000014afcbdc7a0] Non-monotonous DTS in output stream 0:0; previous: 31022777, current: 31019884; changing to 31022778. This may result in incorrect timestamps in the output file.
2019-06-23T18:36:05 MCEBuddy.AppWrapper.FFmpeg → [mpegts @ 0000014afcbdc7a0] Non-monotonous DTS in output stream 0:0; previous: 31022778, current: 31022775; changing to 31022779. This may result in incorrect timestamps in the output file.
2019-06-23T18:36:05 MCEBuddy.AppWrapper.FFmpeg → [mpegts @ 0000014af929a920] PES packet size mismatch
You can try telling MCEBuddy to use AVIDemux instead of FFMPEG and see if that helps by adding CommercialMergeTool=avidemux to your profile