https://bugs.kde.org/show_bug.cgi?id=425916
Bug ID: 425916
Summary: Black lines on the top and left edges appear when
rotating a video by 180 degrees
Product: kdenlive
Version: unspecified
Platform: Manjaro
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Video Display & Export
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Created attachment 131249
--> https://bugs.kde.org/attachment.cgi?id=131249&action=edit
Attachment contains image before and after rotation by 180 degrees
SUMMARY
When rotating a video by 180 degrees, on top and on left edge black lines
appear that are 1 pixel wide. The same happens if an image is rotated (See
Attachment)
STEPS TO REPRODUCE
1. Load image (with exact dimensions as project)
2. Rotate that image by 180 degrees using Rotate (keyframable)
3. Extract frame, or render as image sequence to get rotated image
OBSERVED RESULT
On top and on left 1 pixel wide lines appear, and on bottom and right image is
cropped by 1 pixel. The color of those lines that appear is the background
color chosen in rotation (it is black when the background is transparent).
EXPECTED RESULT
SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma:
(available in About System)
KDE Plasma Version:
KDE Frameworks Version:
Qt Version:
ADDITIONAL INFORMATION
It seems that the center of rotation is a particular pixel, and not the center
of image, which would be on the line between pixels.
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