MPV Error

I usually get the error when I'm transcoding an anime film to 60 fps on veryslow setting. I usually don't get it when it's on slow. I've attached the error that pops up and a picture of my settings when transcoding.

And here's the log:

20:14:54.908: ===== Starting mpv ======
20:14:54.908: Command line: C:\Program Files (x86)\SVP 4\mpv64\mpv.exe F:/Mobile Shet/H Movies/Studio Seven/Baku Ane Otouto Shiboccha zo! 2 Ep 1.mp4 -o F:/Mobile Shet/Baku Ane Otouto Shiboccha zo! 2 Ep 1.temporary.mkv --no-audio --no-sub-auto --input-ipc-server=mpvencodepipe --vf=vapoursynth:[C:\Users\Pointdexter\AppData\Roaming\SVP4\scripts\ffff.py]:4:8 --ofps 60.000 --of=matroska --ovc=libx264 --ovcopts=preset=veryslow,crf=12,threads=8
20:14:55.118: Playing: F:/Mobile Shet/H Movies/Studio Seven/Baku Ane Otouto Shiboccha zo! 2 Ep 1.mp4
20:14:55.118: (+) Video --vid=1 (*) (h264 1920x1080 29.970fps)
20:14:55.118: Audio --aid=1 --alang=und (*) (aac 2ch 44100Hz)
20:14:55.118: Opening video filter: [vapoursynth file=C:\Users\Pointdexter\AppData\Roaming\SVP4\scripts\ffff.py buffered-frames=4 concurrent-frames=8]
20:14:55.595: VO: [lavc] 1920x1080 yuv420p
20:14:55.600: [encode-lavc] Opening video encoder: libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 [libx264]
20:14:55.605: [encode-lavc] Opening output file: F:/Mobile Shet/Baku Ane Otouto Shiboccha zo! 2 Ep 1.temporary.mkv
20:14:55.605: [encode-lavc] Opening muxer: Matroska [matroska]
20:14:55.656: V: 00:00:00 / 00:30:40 (0%) {8.3min 7.4MB}
20:15:56.560: V: 00:00:05 / 00:30:40 (0%) {320.4min 4.5fps 1261.8MB}
20:16:57.046: V: 00:00:13 / 00:30:40 (0%) {282.5min 5.8fps 1021.3MB}
23:17:49.701: V: 00:00:18 / 00:30:40 (1%) {277.4min 6.1fps 980.7MB}
12:55:46.895: ===== mpv exited with code -1073741819 =====