Bug 461869

SUMMARY:
Hi, 
The Recorder docker has a "Input FPS" option (the first on the top). This option influences as a multiplier the duration of "Extend end result" and "Enable result preview". But it's not expected as these two values are set in seconds.   

STEPS TO REPRODUCE:
[setup]  
- Create a new document, open the Recorder docker, set it to 1 second, and start recording. 
- Scribble a little artwork for 5 minutes, so you get more or less 300 frames recorded. 

1. Try to export the first video with  "Input PFS" at 2, and preview/end-result to 6 seconds.
3. Try to export a second video with  "Input PFS" at 120, and preview/end-result to 6 seconds.

OBSERVED RESULT:
None of the two videos will have  6 seconds intro and outro. 
- The first one (Input FPS 2) will end with a 1min30 way too long intro/outro, 15x longer than the 6 second promised/setup. 
- The second one (Input FPS 120) will end into a 2 second intro/outro,  0.25x shorter than the 6 second promised/setup, almost not visible.
This is because the Input FPS multiply or divide the speed of intro/outro and Krita does probably a mistake in the math. This Input FPS setting should only influence the input FPS of the frames, not influences the seconds of intro/outro, these ones should only be calculated with the Output FPS (eg. 6 seconds at 30FPS = 180 Frames long at 30FPS). 

MATH FOR WORKAROUND: 
This bug is invisible with the default "30 Input FPS" and "30 FPS playback" settings. But as soon as you have a painting with a duration of hours and want to shorten it with the Input FPS, you'll loose the consistency of Intro/Outro feature: they'll be two fast... Unless you do reverse math: 
eg. if you want 6 second and need 120 Input FPS to get your duration exact, do: 
30/120=0.25 
so 6 seconds will be 6x0.25=1.5 seconds intro/outro.
and to get a real 6 second, you need to do 6x(1/0.25), so 6x4, and enter 24second. 
Result; at 120FPS; 24 seconds for 6 seconds.

EXPECTED RESULT:
The value entered as seconds for the end result (outro) and the result preview (intro) to be respected on the final rendering, no matter what Input FPS value is set.