Compression Ratios

[Jeremy Ball]

What compression ratios are most people using to get the most efficient balance of quality and SSD space. Mike at FXPHD said they use 6:1 for green screen and usually 12:1 for most other shooting.

Does that sound like a good rule of thumb for 4K and 3K?

What are your experiences?

Thanks

 

[Ben Pluimer]

I've had very solid experiences with 10:1 and 12:1 for 1080p downrezzing. Even projected theatrically on a 2k projector, 10:1 looked great to my eye. That's not a scientific test, so take it for what it's worth.

 

[Chris McKechnie]

Most features that I'm aware of are shot 7:1/8:1. At 8:1, you can get 38mins on a 128GB SSd. Anything below (3:1 for ex) 5:1 is overkill.

 

[Noah Yuan-Vogel]

At 8:1, you can get 38mins on a 128GB SSd.

You are talking 5k 24fps EPIC, this is the Scarlet forum, so it would be more informative to quote 4k 24fps numbers. At 8:1 4k 24fps, you can get 53min on a 128GB SSD.

At Scarlet's top speed, I don't think you could even fill a 128GB SSD in 38min if you tried

 

[Scott Crawley]

It seems a reasonable theory, that if you have a shot you know will be a bit underexposed, it would be beneficial to use a little less compression. Does anyone have experience to support this theory?

 

[TheBied]

It seems a reasonable theory, that if you have a shot you know will be a bit underexposed, it would be beneficial to use a little less compression. Does anyone have experience to support this theory?

If you know a shot is going to be under-exposed and you will be pushing the footage more in post, you will want to retain as much raw detail as possible. So yes, a lower compression ratio will help for scenarios like this.

 

[Scott Crawley]

Thanks!

If you know a shot is going to be under-exposed and you will be pushing the footage more in post, you will want to retain as much raw detail as possible. So yes, a lower compression ratio will help for scenarios like this.