8mm/16fps Temporal Noise Reduction
Posted: Fri Oct 28, 2022 12:48 am
I inherited a set of 8mm films from the 1940's and 50's from my father. I've had them digitized to 5.2K 16fps (overscanned) and am trying to use the Final Cut Pro (FCPX) Neat Video plugin to clean them up.
Because these digitized clips are 16 fps, FCPX has to turn this into a standard frame rate. I've chosen 30 fps. The default Frame Sampling is "floor" which just duplicates most of the 16 frames to get 30 fps. Instead I am using FCPX's Optical Flow Frame Sampling to smooth things out between frames and each frame is now unique.
The result of the resampling is that the 30 fps clip now propagates any single-frame artifacts to 1-2 adjacent frames. Neat Video's temporal noise reduction no longer sees these as single-frame artifacts and does not remove them. I thought I could overcome this by increasing the Radius to include more surrounding frames that won't have the artifacts but that didn't help.
The ideal fix would be to process the 16 fps original clip with Neat Video to clean up the noise, dust, scratches, etc and then import the cleaned up clip to FCPX for resampling to 30 fps. Is there a way to do this?
Another alternative idea is to use FCPX's "Floor" frame sampling so that the frames are just repeated and tell Neat Video there are repeated frames. It seems that the effect of this is that the resulting output is not as smooth.
Because these digitized clips are 16 fps, FCPX has to turn this into a standard frame rate. I've chosen 30 fps. The default Frame Sampling is "floor" which just duplicates most of the 16 frames to get 30 fps. Instead I am using FCPX's Optical Flow Frame Sampling to smooth things out between frames and each frame is now unique.
The result of the resampling is that the 30 fps clip now propagates any single-frame artifacts to 1-2 adjacent frames. Neat Video's temporal noise reduction no longer sees these as single-frame artifacts and does not remove them. I thought I could overcome this by increasing the Radius to include more surrounding frames that won't have the artifacts but that didn't help.
The ideal fix would be to process the 16 fps original clip with Neat Video to clean up the noise, dust, scratches, etc and then import the cleaned up clip to FCPX for resampling to 30 fps. Is there a way to do this?
Another alternative idea is to use FCPX's "Floor" frame sampling so that the frames are just repeated and tell Neat Video there are repeated frames. It seems that the effect of this is that the resulting output is not as smooth.