[Gareth Ellner]

Thanks for your advice, Rafael.

We’ll stick to 80 or 100Mbps Long-GOP then, I think. It will make the shoot a little smoother/safer if we don’t need to clear our CF cards.

BTW, the documentation for firmware v1.6.248 claims that the rates are “422P@HL: 100/140/180/220 Mbps VBR 4:2:2 I-Frame Only” – however, I know it can also do 280Mbps so it might well be a typo.

Cheers again!

[Gareth Ellner]

Hi all,

I’m assisting Andrew with his film as sound recordist, camera assistant and general technical/IT assistance. I’m helping him to come up with the workflow for the film.

I notice that the Nanoflash can record either I-frame or Long-GOP MPEG2. I know technically what this means but neither of us are familiar with exactly how well FCP (on a modern high-spec Mac) can handle 1080p Long-GOP. The film will have a modest number of layers and effects.

We have limited storage, so the highest bitrates could be impractical. I know that (for example) 100 Mbps 4:2:2 Long-GOP will be better quality than 100 Mbps 4:2:2 I-frame (due to compression efficiency), but:

Should we use I-frame-only on the Nanoflash exclusively, or will FCP cope fine with Long-GOP?

Thanks for all your insights so far!