https://bugs.kde.org/show_bug.cgi?id=450790
--- Comment #5 from Reinold Rojas <rojasrein...@gmail.com> --- After some testing it seems like it is the different resolution for the saved images (from the painting changing sizes midway). Checking the ffmpeg docs it says "The _size_, the pixel format, and the format of each image must be the same for all the files in the sequence." Trying a simple ffmpeg command to extend a custom frame it breaks exactly when the input image resolution changes. It does seem like the preview still works (probably because it gets and reads the extended portion separately from the main file) so I think doing the same for the end result should get around the issue. fmmpeg doc: https://ffmpeg.org/ffmpeg-all.html#image2-1 -- You are receiving this mail because: You are watching all bug changes.