Render animation sometimes fails to render to mp4 if the naming in the export name field is empty or wrong. A lot of times the png's have exported succesfully anyway. There should perhaps be a way to use the folder with png's as a source to start encoding.

Another way would be to make it impossible to have wrong naming convention, or offer away to give a name after it fails and to just continue the process.

either of those options,or maybe even all of those could be useful.


The first option would be good to reuse png's even if you closed krita and reopened a day after and you really need to make an mp4 quickly. Not having to redo the png export would be such a timesaver ,if you can just make it pount to FFmpeg in some way.
An option 'png source' or something like that