You can up-convert to pretty much any FPS using Handbrake or RipBot264 with the InterFrame script. It’s not a video editor, but it adds the interframes into the compression/transcoding process.

I use RipBot, and here’s the Avisynth Script I add to the generated script:

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# This is line 53 Interframe
cores=12
SetMTMode(3,cores)
PluginPath=”C:\Program Files (x86)\AviSynth\plugins\”
LoadPlugin(PluginPath+”svpflow1.dll”)
LoadPlugin(PluginPath+”svpflow2.dll”)
Import(PluginPath+”InterFrame2.avsi”)
SetMTMode(2)
InterFrame(GPU=True, Tuning=”Film”, Preset=”Medium”, NewNum=48000, NewDen=1001, Cores=cores)

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Adjust your “cores=” to your CPU

(NewNum / New Den) tells you what your output frame rate will be; in this case 48FPS. Use 60000/1001 for 60FPS. 0/0 is automatic.

Use Avisynth 2.6.

Use Interframe 2.8.2. It has the dll and avsi files you need.

How does the Optical Flow interpolation handle fast pans or fast motion scenes?