Sped up clips render jerky?

[FaerieSherilyn]

Hi PR community!

I was wondering if anyone would be able to help me with something I have experienced when rendering my first video with Adobe Premiere Pro after converting from Sony Vegas Pro 14.

When I am speeding up video clips, the end result appears very jerky and stuttery almost like stop motion. I will post a link to an example here. At 8:00 in this video (where I am applying the highlighter) you will see that the sped up footage appears very jumpy as if some frames are missing.

Standard Gothy Slightly '07 Emoish Makeup Look | FaerieSherilyn - YouTube

Whereas, at 8:30 in this video, sped up footage appears to play at real time and is very smooth. This video was made on Sony Vegas so I highly doubt the issue is with my computer.

Refinery29 inspired Eye Goals Makeup Tutorial | FaerieSherilyn - YouTube

I am also aware that I didn't quite hit the sweet spot in my lens' depth of field focus in the first video, resulting in the quality being slightly lower than that of the second. Could this have something to do with the problem?

Answers would be greatly appreciated, I have only had premiere for around 5 days and so am very new!

I am currently rendering my output to match my source footage which is 30 fps. However, I did do a test re-render at 60 fps which actually seemed to help the problem, however I am aware that doubling up the frame rate of the source is not a good long term solution.

Other settings I am using - H.264, Youtube 1080p preset, max bit rate 16.

[R Neil Haugen]

How did you speed up the section? Time re-mapping in the Effects Control Panel, Speed/Duration change, what?

And ... depending on your choice, did you use frame sampling, frame blending, or optical flow?

Neil

[FaerieSherilyn]

Hi Neil.

I have tried exporting the project with all three, and there is not much difference. I would say Optical is the smoothest overall. I sped up the clips with the Speed Changer Cursor Tool "Rate" (pressed R", would you say time re-mapping is a better option? I have only had pro for a few days and am still a little new

[R Neil Haugen]

I've most often just used the right-click "Speed/Duration" box, and typed in a number.

I'm wondering what speed change you made to that section though ... I tried the Rate-Stretch tool as you did, and then set to Frame Blending ... it was pretty smooth to begin with, very smooth after applying F-B. Maybe how much change might make a difference in smoothness?

Neil

[FaerieSherilyn · Accepted solution]

Hi everyone. I am pretty sure that I have solved the problem now. I sped up my clips using Speed/Duration instead of the rate tool, selected Frame Blending on the individual sped-up clips, which resulted in full green render files and a smooth playback for all sped up clips. Playback is still smooth when i export