Rendering is a compression technique that eliminates
redundant data. How much redundant data do you have? It depends largely on the
number of color changes you have frame to frame in your video. There is no way
to know until you render it which is the process of determining that. It’s like
measuring the distance between two points by stepping it off and when you
start, you can’t see the destination. Is it up and down hill or flat? Increasing
the quality is like taking smaller steps which changes the number of color transitions. This is a long way of saying that you will have to render it to determine the size. Sorry, no shortcuts. Incidentally, you generally can't compress a rendered file. It's already compressed.
If I were having a render time issue, I would buy a faster computer or dedicate one to rendering.
I've always known Premiere Pros estimates for file output size were reasonably accurate. I never payed extreme close attention to see just how accurate.
Over time, I just took it for granted I could trust the numbers.
Tonight, I thought I would try and trick the numbers. Throw a couple of cure balls, see what happens.
I mixed B&W 480p footage with 4K color footage, along with some 1080p and 720p.
Just to make predicting file sizes a real crap shoot.
This video was 12:36 in duration.
The estimated file size was 1832mb
The rendered video was 1824mb So, off by only 8 mb.
Video is 35:42 in Duration
The estimated file size is 5188mb
The rendered video was 5187.47mb So, off by .5 something mb.
This is a Vimeo video I rendered yesterday. I didn't re-render it. I just checked the estimated file size against the actual file size.
This video is 3:02 in Duration.
The estimated file size is 354mb
The rendered video is 348mb So, off by 6 mb.
I'm glad I did this test.
Now I know how accurate these estimates actually are. Deadly Accurate if you ask me.
This is no weather forecast.No shot in the dark.It just affirmed what I already believed.
Now you should believe as well.
I'm talking about the ability of a program "Camtasia" to estimate file size before rendering.
Premier Pro can do that.
With Deadly Accuracy as I have demonstrated. 2 of those videos are are rendered as High Quality 1080p videos. They weren't rendered for file size, and they were one pass renders.
The other was rendered for Vimeo, as per Vimeo standards.
Handbrake has absolutely nothing to do with adding a file size estimator to Camtasia's production wizard.I understand where you're going with this.But it's not the actual topic.Not the way I see it.
joseph.robinson,s Idea is.............my video just published as 220 so now I am rendering it again at a higher quality and hoping it is under 500. It would be nice (and time saving) to have an estimate earlier in the process.
We have beaten this topic to death. I have fast hardware and short video segments. Rendering is not a problem for me.