Version 9 Render times

[Hutch TV]

Just doing my first MPEG4 after upgrading to version 9.5 Workgroup from V6.

Looks like render times are quicker?

A 35 minute timeline is taking 18 minutes or is it that 50P takes double the time than 25P?

[Jerry]

50p will definitely take longer. I don't think it would be twice as long. That would depend on the CPU and settings.

[Hutch TV]

Hey Jerry what do you know about file size when comparing 25P to 1080P?

Also when making an MPEG4 do you go variable or constant bit rate.

I've just done a 1920 1080 25P constant @ 9MEG. The edit is of a dance concert, shot wide in ök" lighting.

I've just now put another render on but gone variable and are going as 9 being the lowest and 14 being the highest.

I wonder how Edius" deals with it and if or not it really matters. If I wanted to improve the quaility then maybe 14 constant would be best?

Thanks for any tips you have.

Martin.

[Jerry]

Martin, 25p is a frame rate and 1080 is a resolution. The faster the frame rate the smoother the motion will be. The higher the resolution the clearer the image will be, even after a down convert.

IMHO, choosing a bitrate is determined by size requirements, delivery mode, quality of the actual video, motion in the video, and intended output quality.
In some cases, a single pass encode may not be enough to get a good quality output with a low bitrate.
Edius doesn't have a dual pass option, but TMPGE has the AVC plug-in that does have a dual pass option.
When you get into the lower bitrates you will need to test what works for you.
It's not always a 'one size fits all' scenario.
The biggest space saver would be a dual pass variable encode. If size isn't an issue I always use constant.

I'm doing more H.265 outputs through NVENC and Mastering Works 7.
I don't have the H.265 QS option on my system.
NVENC allows me to speed up either H.265 or H.264 files by leveraging the horsepower of my GPU(1080ti). I use constant on these exports.

You just have to experiment to determine what works best for you.