Huge filesize reduction - is something wrong here?

Before I let FF lose on my large media library I'm experimenting with a small subset of files.

I have a very simple Flow:

Files that are being processed through this flow are seeing a huge reduction in filesize.

8.93GB -> 2.55GB
4.74GB -> 1.01GB

Is there some default setting for one of the above nodes that is causing this?

I've attached a log of a file processed as well as some screenshots below.

52d95eef-641d-46b2-8906-db38888af636.txt

905kB

If you're cropping black bars, it has to reencode the video as well, so make sure you use FFMPEG Builder: Video Encode or FFMPEG Builder: Video Codec.

You can add this directly after FFMPEG Builder: Crop Black Bars and only one output 1 of that (black bars were detected and will be removed).