I went through each clip individually in the clip attributes and discovered a few that were 60fs, so changed them to 30fs.
Changing the frame rate in clip attributes is something TOTALLY different.
If you are rendering at 30fps, then as above, 60fps is an exact multiple and not an issue (It just renders every other frame).
Changing the clip attributes from 60fps to 30fps changes the play speed and duration … basically that clip will appear at half speed.
I rendered one clip in its native 30fps in ProRes 3840 × 2160 and it was jerky. I tried again raising the frame rate to 60fps (which I appreciate would slow it down) but it wouldn’t let me do it.
Of the clip (clip attributes) or the render?
If you change the fps of a clip recorded at 30fps to 60fps using clip attributes, you’d speed it up.
I think I’m out of my depth here! I need to do some reading and understanding of all of this. Tinkering around the edges without understanding the consequences of an action is a waste of time. Thanks for your help Dave. I shall go away and consider…
Using clip attributes, the only thing that doesn’t change is the number of frames in the clip.
What changes is how DR treats that clip when added to the timeline.
So, same number of frames, but changing from 30fps to 60fps (in clip attributes) uses those frames twice as quickly .. ie speeds it up.
Whatever the source video’s native fps, and whatever the timeline’s fps, adding the video to the timeline will maintain the duration of the clip.
Re-timing is only needed to ensure badly matched fps (non perfect multiples , as above) don’t appear jerky due to lost frames when rendered. This is when the tools in DR do a superb job to “hide” this issue.