Mixing frame rates

Hi all. I will be doing a 3 or 4 camera project soon. I have two Canon tapeless AVCHD cameras, a Vixia HFM43 and an HFG10. I'm going to borrow two more cameras but don't know what kind they are yet. I was thinking of shooting the HFM43 in Canon's FXP mode with a 30 frame rate, and the HFG10 also in FXP mode but with a true 24 fps progressive, a frame rate that the other Canon is not capable of. I wanted the better frame rate because I am sometimes going to crop and zoom in on parts of the video taken with that camera, and the higher quality video it takes seems to make this possible without making the video too grainy. I have since googled a bit on mixing frame rates like this in one project, and people generally warn against it. Is this true? Is it better to stick to one frame rate?

Calm down, calm down  .  .  . everything is OK.
Canon's 60i and 30p are both the same frame rate  .  .  .  30fps. (Ignore the 29.97 as it is the daft American system and can be regarded as 30fps)
It's just that the 60i has 2 interlaced fields (don't worry about it!) per frame whereas 30p has 2 identical fields (equivalent to one field) per frame.
If you are interested you can read about interlaced and progressive frames in Wikipedia!
Suffice it to reiterate, they are both 30fps.
It would make sense in future to have all cameras set to the same although it shouldn't make any difference.
NOTE: Over the past few years a number of cameras have included a "60p" setting (note the "p").
This is  60fps and shouldn't be mixed with 60i or 30p

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