Repair short visual glitches in 4K HEVC mp4 videos

[XperienceD]

The other day, I copied some 4K HEVC mp4 video files taken with my new camcorder Panasonic HC-X1200 from a smaller SDXC card into a larger one using the computer, and then I inserted that larger card into the camcorder for continuing recording. Later, I backed up the files to my computer before erasing the card to make room for new videos.

It looks like some videos (ca. 1 in 12) got corrupted as a result for about half a second, manifesting in visual glitches (square blocks or tearing, see attached screenshots). I tried to fix the problem using the demo versions of some video restoration software, like EaseUS Fixo, Wondershare Recoverit, Stellar Video, but they did not fix the issue. I think that the problem with my video files is not severe enough for them to take it seriously (compared to problems that other users might have, like corrupted file structure).

Does anyone know of a way to repair the glitches? I have attached very short clips (with light file size) that show them. Frankly, I do not believe that this problem should pose a big challenge to programs that tout the use of AI to enhance videos, since there are only minimal frame-to-frame changes in my videos. Some sort of interframe interpolation should do the trick.

I would be grateful if someone could take a look at it and try to eliminate or reduce the glitches. I, for one, have learned my lesson not to mess with SDXC cards next time the way I did.

[Sharc]

My proposal for a fix would be to substitute the damaged frames by motion interpolated frames from adjacent healthy frames. Can be a bit laborious though, and may introduce interpolation artifacts.

Example using Avisynth+RIFE (downsized for convenience). The interpolated frames are marked with RIFE for this demo:

[Selur]

DGDecNV as SourceFiter + SoftLight (to brighten it up a bit) + SpotLess with radius 6 seems to work too on the first clip.
(6 is probably too high if there is motion, but it works here)
But for the second clip, I agree that replacing the frames is probably the 'go to' solution.
For both sources, it is interesting to see how different source filter represent the broken frames.

[Sharc]

... I tried to fix the problem using the demo versions of some video restoration software, like EaseUS Fixo, Wondershare Recoverit, Stellar Video, but they did not fix the issue. I think that the problem with my video files is not severe enough for them to take it seriously ....

The contrary: These tools are totally overwhelmed to address such issues properly.

[XperienceD]

The results in the videos posted by Sharc look good to me! Now I need to get familiar with how to use the combination of Avisynth and RIFE. Objectively speaking, the glitches are not that severe, but it still bugs me that they have nested themselves into a few video files.

Thanks to everyone for helping me!

[XperienceD]

The contrary: These tools are totally overwhelmed to address such issues properly.

Judging by the before/after screenshots on their websites, you would think that fixing my issue should be a piece of cake for them!

[Sharc]

The results in the videos posted by Sharc look good to me! Now I need to get familiar with how to use the combination of Avisynth and RIFE.

Interpolation works pretty well for these low-motion scenes. Don't expect similar nice results when replacing 20 .... 30 damaged frames in a row for scenes with high(er) or more complex motion. Interpolation artifacts may look very unpleasant when bridging more than just a few damaged successive frames.

[XperienceD]

The programs I already tried have one thing in common that made me think that something is not right: You just add the whole video file to the queue and click on "repair" without specifying the frames that you want to fix. How does the program know in this case what you want to repair exactly? A good program should allow you to narrow down the section and/or specify the area that needs fixing.