Can't say if more stable than avisynthMT or not. Maybe it depends on your available threads or settings. I only tried encoding a 1440x1080 1m30s video with Medium preset without crash or deadlock. If you want to avoid the deadlock caused by MCompensate, try setting SLMode to 1 or 3(spatial sharpness limiting) for the time being. Be aware that activating NoiseProcess with some combination of settings will invoke MCompensate too.
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