Successful 10.14.6 Build. Lots of Trouble Transcoding footage?

Like it says in the title I had tons of success with the Designer TB3 golden build on TonyMac. Everything works flawlessly. However, my main purpose for building this machine is for transcoding footage. I'm currently using Silverstack Lab to do this and I'm getting a weird result. [Video Link Here.](https://streamable.com/0htck)

Additionally, I've transcoded the same footage with Handbrake and it worked fine. So I'm fairly certain its Silverstack. Any help is appreciated. I have no idea what could be causing this.

submitted by /u/12yan_
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