OOM occur at HED soft-edge line

[QureL]

I tried processing a video with about 400 frames. After DWPose finished running, an out of memory error occurred when HED soft-edge line was executed. The following image shows the terminal output when oom occurred, but no worthy information :

my memory is total about 32GB.
I'm curious, does HED soft edge significantly utilize memory rather than VRAM? What should I do?