Apple Motion / Frame rate changes when updating image sequence

Motion creates an image sequence as a "movie" with one image = one frame for *whatever* your project frame rate is. If you need to change it once imported, then you can go into the Media pane and select the Image Sequence, and in the Media inspector, you can change the Frame Rate to whatever you need in Media Controls (and I mean quite literally - whatever — you can set custom frame rates with that control!!).

Thanks.

AFAICT, an image sequence does not have a frame rate per se. Are you saying that the duration in the timeline is changing?

I tried importing an image sequence into a 1080p 25fps Motion project, and then I modified one of the images.

The modified image appeared and nothing else changed.

I suggest you try deleting Motion preferences, and see if that fixes it. Many weird behavior gets fixed by clearing preferences.

To delete preferences, hold down command and option while starting Motion and click Delete Preferences.

PS - I am not familiar with Cinema 4D, but it *may* save image sequence frames with sequence metadata (which may include a frame rate). It is also possible, in Motion, to pull a frame rate "From File"... Media Controls is flexible enough for you to play with to see which works best. Motion may also use such meta when importing, but so far, that is not a situation I've experienced.

That's pretty bizarre. The next question would be which version of Motion are you running? What's your OS?

FWIW, I've tried to reproduce what you are doing and don't see this happening. Can you give really explicit and basic steps for us to try to reproduce? I think what you are saying is:

1. Export an Image Sequence from a your 3D top that is 25 fps to a jpeg sequence.
2. Create a Motion project that is 25 fps
3. Import the image sequence (command I)
4. Apply the Hold Frame behavior 3X.
5. Re-export the image sequence from the 3D app, overwriting the first export.
6. Open the Motion project and check the image sequence frame rate.

Is this right?

Please tell us exactly how you are importing the image sequence into Motion, and what the Motion project settings are.