I think daVinci Resolve should do the trick, at least if you split the job in 4 or 5 smaller batches and stitch them together at the end of the process. But after all I’ve heard, I think these steps in between aren’t necessary with Resolve.
Michelist
As you can imagine I don’t have 50k images to assemble a video with just laying around.
Try to if natron can assemble that into a video strip. Since it is node based it might not think how big the sequence really is.
That error message is because ffmpeg tried to access a file that did not exist, i.e. the first of many missing files.
I suspect that recording at 1 canvas capture per second, while painting on a 4k x 4k canvas and saving those 4k x 4k images was very stressful for krita and that it failed many times.
There is a limit to how many frames can be displayed per second in a video.
If there are more frames than can be displayed in a given time interval then some of them must be discarded.
In future, for painting sessions that last for over an hour, I’d suggest that you use a capture interval of maybe 4 seconds and do the capture at 1k x 1k.
To use the existing frames, you’ll need to fix the gaps in the number sequence.
If I was doing this, I’d manually discard many frames because they will not be seen, unless you make a 15.5 hour video.
I put it into DaVinci in batches about 5 and it worked perfectly!! I can now delete the 45gig jpg file 
Thank you all for the help! I still cannot export the time lapse from Krita but I have not yet updated to 6. Either way can make my time lapses fine in DaVinci!
In regards to using that link/zip folder to update to Krita 6, are your instructions for Mac or PC?
I do not see a “unpack” function to send the zip files contents to the correct places in my C drive or have I misunderstood. I am on Windows.
When you say:
“you have to point Krita to the file “ffmpeg.exe” in the folder “bin” of the unpacked ZIP archive.”
How do I do that? I looked in the Krita program and I couldn’t find a manual update dropdown or anything?
Sorry to hear the operation was postponed.
Kind regards.
you have to unzipp the ffmpeg manually into your system and on Krita point it to that file.
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