Following up with this…
HDR Tone Mapping off, I can hw transcode wonderfully, sub burn-in enabled or not. Here are two crash dumps that occurred within 12 seconds of one another when I enable HDR tone mapping and try to transcode without sub burn-in enabled. With sub burn-in enabled it transcodes via software.
FizzBEAUC-Crash-Dumps.zip (161.6 KB)