Since you have only a small amount of 60i to convert to 24p, you might consider doing it nicely.
Consider four methods:
Method 1. first convert the 60i to 30p (simple deinterlace), then convert the 30p to 24p by "nearest frame".
Method 2. first convert the 60i to 30p (simple deinterlace), then convert the 30p to 24p by "optical flow".
Method 3. first convert the 60i to 60p (double deinterlace), then convert the 60p to 24p by "nearest frame".
Method 4. first convert the 60i to 60p (double deinterlace), then convert the 60p to 24p by "optical flow".
Compressor can do "nearest frame" (its "fast" rate conversion). This means discarding whole frames, causing temporal roughness. The roughness will be less with Method 3 than with Method 1 because the jumps will be smaller, but Method 3 is difficult due to the double interlacing.
Compressor can do "optical flow" (its "better" and "best" rate conversion). This achieves beautiful smoothness but often with unacceptable morphy artifacts. You must look and see whether your scenes tolerate Compressor's optical flow.
The artifacts will be less with Method 4 than with Method 2 because 60p-to-24p requires just one "in between" frame while 30p-to-24p requires two, but Method 4 is difficult due to the double interlacing.
Dennis Couzin
Berlin, Germany