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To shoot in 4K 60mbps or 1080P 60mbps if rendering to 1080P 25-50mbps?

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Peter Holt
To shoot in 4K 60mbps or 1080P 60mbps if rendering to 1080P 25-50mbps?
on Jun 4, 2017 at 5:14:23 pm

This is peripherally related to Vegas (I use Pro 13; still waiting for v14 bugs to get fixed ☺ ) because the workflow may be different in 4K versus 1080.

I have not yet tried editing 4K source files.

I am using a Sony FDR-X3000 action cam and the options which I can use in my application (video from a light aircraft) are

2160 100mbps 30fps
2160 60mbps 30fps
1080 60mbps 60fps

The first one is a bit marginal in terms of maximum recording time with the 256GB SD card and I would prefer to not use it. Also the camera gets pretty warm and will shut down within an hour or so if it doesn't have enough airflow around it.

I am rendering to 1080P 60fps and would pick the bitrate to fit inside my 5GB/week Vimeo upload budget ☺ I find that 25mbps is plenty for anything other than fast moving scenery or moving fine textures (e.g. tarmac does funny things if you pan, at less than 50mbps).

Of course Vimeo downsamples to ~5mbps anyway but you can "Download" the original file if you want the quality.

I have not found a lossless process in Vegas i.e. matching codecs. The above three formats are Sony's XAVC format.

But also I am doing a bit of lens correction with a plug-in, and obviously that will lose some pixels (because one has to crop afterwards) which is why I want to try shooting in 4K.

The camera does not have a 2K option. That would be really useful.

The other thing is whether I should edit the 4K footage in Vegas, or use Handbrake to go down to say 2K first. Handbrake is a very slick program which seems to do a very good job and I wonder if Vegas is as good.

I appreciate any input.


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Francois Pénzes
Re: To shoot in 4K 60mbps or 1080P 60mbps if rendering to 1080P 25-50mbps?
on Jun 4, 2017 at 9:19:28 pm

Hi Peter

Well, personally I think you're on the right track to downgrade for editing. In order to not choke up Vegas, especially if you have a lot of effects in your clip(s), I downgrade it way down and after I am done, re-assign the original video track prior to final render.

It makes for a more fluid work-space.

Cheers !

PC Win 10 Pro 64-bit 16gb Intel® Core™i7-2600k Quad Core 3.40GHz NVIDIA GEFORCE GTX 550 Ti
Cameras: Canon XF305 + Canon XH-A1

''When the cutting stops, the editing begins...''


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Peter Holt
Re: To shoot in 4K 60mbps or 1080P 60mbps if rendering to 1080P 25-50mbps?
on Jun 5, 2017 at 5:51:01 am

That's interesting... how do you reassign the original video track?

For example you have edited out lots of it so the timeline has gaps in it.

Is the workflow in Vegas 13 otherwise the same for 4K? I read somewhere that is uses a proxy for the media but maybe that is transparent.


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Peter Holt
Re: To shoot in 4K 60mbps or 1080P 60mbps if rendering to 1080P 25-50mbps?
on Jun 5, 2017 at 6:07:39 am

I don't seem to be able to edit my post, so here is an extra bit:

Which of these three options

2160 100mbps 30fps
2160 60mbps 30fps
1080 60mbps 60fps

would be best if I am outputting to 1080P 60fps 60mbps? What about if I am outputting to 25mbps?

I get the feeling that 4K must be wasted unless you have the mbps according to how many pixels there are, so 60mbps in 1080 means 240mbps in 4K and we don't have that option.


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