Hi, I'm going to be shooting video with the intent of speeding it up for the final cut.
It's for a music video, and we will be shooting the band playing along with the song at 40% speed.
The final video will sped up to bring the 40% speed to match the soundrack at 100%
The question I have is your suggested framerates for shooting 4k and/or 2.5k

This will all be shot following a smallish boat cruising at low speed.

Thanks!

Hi, thanks for the inquiry. We're hoping that you could get the best recommendation that you may need from our valued DJI Forum members to possibly achieve this particular scenario. Thank you for your support.

DJI Tony Posted at 5-6 11:14
Hi, thanks for the inquiry. We're hoping that you could get the best recommendation that you may need from our valued DJI Forum members to possibly achieve this particular scenario. Thank you for your support.

Thanks, I figured out the playback rate of 2.5, shooting at 30 fps seems better than 24 when I speed it up, but is there an optimal rate for this application?

I believe that speeding up doesn't need to have a certain framerate. Only if you slow something down because you are missing frames and the footage gets less smooth.

I would recommend to shoot at max possible resolution (not always highest rec option). Each camera has its own optimum (details per image + bitrate). It is also connected with sensor scan approach. After shooting you can't change picture dramatically.