Hi, I'm POVHFR Videos. I make my videos at resolutions of to 480fps or even 960fps at 1080p on a laptop ($500). Here is how.
1. I use blender 2.78 to slow down my videos to 15fps from 240fps in 1080p or 720p. How I do that is by going to the Screen Layout little icon and selecting Video Editing. (Blender can go up to 1500fps actually!!!)
2. Going to Properties on the little icon to the left the frame rate of the video would read if the video was shot at 1080p240 'Custom Frame Rate: 239.76fps, FPS: 24 /: 0.100) and selecting the '0.100' and bringing that section to 1.6 which automatically makes your video 15fps from 240fps (So PotPlayer can interpolate your video to 30fps on even a budget laptop, which I use)
3. I then select the teal green track and delete that track, as this is the audio track which you can use from you video later. I then change in the 'Frame Range:' section to the number of frames the video has. You also have to select the 'PNG' tab and the setting should list under movie H.264, you click that and then select RGB, and then select the settings under 'Encoding', which gives you how high quality your video can be up to in Kbit/s.
4. I then export the video by clicking 'Animation'.
5. After the video saves (Which is in the Properties setting listed as 'Output: /tmp\' or which ever location you choose, play that video in PotPlayer and select the S/W decoder.
6. I then click on Video Effects > Motion Blur which automatically doubles the frame rate of that video.
I record the video using Alt + C at 1080p at 30fps in .mkv format or .mp4 which records the interpolated video. (Please make sure that there isn't too fast action so there aren't artifacts).
7. I use blender 2.78 again to speed up the video to 1080p 480fps by going to 'Properties' on the left little icon above the video editing sequence. You repeat the process earlier except now depending on how blender reads the video frame rate (sometimes double the frame rate of the video) in which case you have to select the video track (dark blue) and click Add and click Effect Strip and click speed control, which then you multiply your speed to 2.00.
But if your video reads as normal speed (The one you recorded in PotPlayer), you should have double the amount of frames.
8. You simply add the video you originally shot and the delete the video track and move the audio track down from channel 3 to 2.
You use the same method as up above.
9. The frame rate would be 30fps, you then put in 48fps under custom frame rate and change the decimal section from 1.000 to 0.100 and BOOM you have 480fps!
10. If you have the audio and video sync up (The Audio and Video should start at frame 1 and should be the same number ex: 2377), then you put the amount of frames you have in your video stream and the click Animation (Based on Steps 2 to 4). And your video should be 1080p at 480.01fps.
11. I use NCH VideoPad Video Editor which I myself am to this day still getting aquainted with, and import the video that I used with blender into VideoPad.
12. After all the effects and fade ins that you want, when you export your clip, click Detect, and VideoPad will automatically select your frame rate (Usually up to 1000fps), and you can choose whatever resolution you want with that ultra-high frame rate!
13. Your have a quality High Frame Rate video with effects and all at which ever resolution you saved!
I have a YouTube channel where you can see my footage results from this 13 step method for HFR Video!
https://www.youtube.com/channel/UCbevNF ... oaotMoQMpw