https://bugs.kde.org/show_bug.cgi?id=461869
Bug ID: 461869
Summary: [Recorder] "Input FPS" option accidentally influences
the 'Duration' of end result/result preview
Classification: Applications
Product: krita
Version: 5.1.3
Platform: Appimage
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Dockers/Recorder
Assignee: krita-bugs-n...@kde.org
Reporter: i...@davidrevoy.com
Target Milestone: ---
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.
--
You are receiving this mail because:
You are watching all bug changes.
