Compression ratio 2:5:1 video capture?

[shane7951]

I'm using virtualdub to transfer a vhs. I'm using huffyuv v2.1.1. I've tried to Google search but I'm not really getting a clear answer. An earlier attempt I had 2:4:1. What do these number mean?

[msgohan]

It's the ratio of the compressed filesize compared to the uncompressed video coming out of the capture device. So if it would be 75GB per hour in uncompressed format, at 2.5:1 lossless compression it's 30GB per hour.

[shane7951]

Awesome, thank you very much.