Right this is the last few lines I get from the View > Application Log after using the Convert to Edit-friendly.
Export 1 error log:
[Debug ] <TimelineDock::setSelection> Changing selection to () trackIndex -1 isMultitrack true
[Info ] <MainWindow::open> "C:\Users\James\Documents\Randomised Gaming\Video work in progress\OSSC SNES\ossc_snes.mlt"
[Info ] <MLT> Failed to open audio device: XAudio2: XAudio2Create() failed at open.
[Info ] <MLT> [sdl2] Try alternative driver: xaudio2
[Info ] <MLT> [consumer sdl2_audio] Audio Opened: driver=xaudio2 channels=2 frequency=48000
[Debug ] <TimelineDock::setSelection> Changing selection to () trackIndex -1 isMultitrack false
[Debug ] <TimelineDock::setSelection> Changing selection to (3) trackIndex -1 isMultitrack false
[Debug ] <MLT> [producer avformat] audio: total_streams 12 max_stream 13 total_channels 24 max_channels 2
[Debug ] <MLT> [mlt_producer avformat-novalidate] "I:/Elgato Game Capture Footage/EGC_Library/OSSC - OSSC Test Axelay SNES - 2019-04-30 16-56-56/Recording_2019-04-30_16-56-56_0001.ts" checking VFR: pkt.duration %I64d
[Debug ] <FfmpegJob::start> "C:/Program Files/Shotcut/ffmpeg -loglevel verbose -i I:/Elgato Game Capture Footage/EGC_Library/OSSC - OSSC Test Axelay SNES - 2019-04-30 16-56-56/Recording_2019-04-30_16-56-56_0001.ts -map 0:V? -map 0:a -map_metadata 0 -ignore_unknown -f mov -codec:a alac -codec:v prores_ks -profile:v standard -y C:/Users/James/Desktop/Recording_2019-04-30_16-56-56_0001.mov"
[Info ] <AbstractJob::onFinished> job failed with 1
Export 2 error log:
[Debug ] <TimelineDock::setSelection> Changing selection to (7) trackIndex -1 isMultitrack false
[Debug ] <MLT> [producer avformat] audio: total_streams 12 max_stream 13 total_channels 24 max_channels 2
[Debug ] <MLT> [mlt_producer avformat-novalidate] "I:/Elgato Game Capture Footage/EGC_Library/OSSC - OSSC Test Axelay SNES - 2019-04-30 16-56-56/Recording_2019-04-30_16-56-56_0001.ts" checking VFR: pkt.duration %I64d
[Debug ] <TimelineDock::setSelection> Changing selection to (16) trackIndex -1 isMultitrack false
[Debug ] <MLT> [producer avformat] audio: total_streams 12 max_stream 13 total_channels 24 max_channels 2
[Debug ] <MLT> [mlt_producer avformat-novalidate] "I:/Elgato Game Capture Footage/EGC_Library/OSSC - OSSC Test R-Type III SFC - 2019-05-01 12-03-58/Recording_2019-05-01_12-03-58_0001.ts" checking VFR: pkt.duration %I64d
[Debug ] <FfmpegJob::start> "C:/Program Files/Shotcut/ffmpeg -loglevel verbose -i I:/Elgato Game Capture Footage/EGC_Library/OSSC - OSSC Test R-Type III SFC - 2019-05-01 12-03-58/Recording_2019-05-01_12-03-58_0001.ts -map 0:V? -map 0:a -map_metadata 0 -ignore_unknown -f matroska -codec:a flac -codec:v ffv1 -coder 1 -context 1 -g 1 -threads 8 -y C:/Users/James/Desktop/Recording_2019-05-01_12-03-58_0001.mkv"
[Info ] <AbstractJob::onFinished> job failed with 1
If you need any more samples let me know, I should test this on a clip I expect it to work on just to be sure, it is working on my machine OK.