https://bugs.kde.org/show_bug.cgi?id=357326
Bug ID: 357326
Summary: 1326x888 resolution/aspect ratio cause faulty display
of videos
Product: kdenlive
Version: unspecified
Platform: Compiled Sources
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: User Interface
Assignee: j...@kdenlive.org
Reporter: qubo...@gmail.com
Created attachment 96365
--> https://bugs.kde.org/attachment.cgi?id=96365&action=edit
sample with witch the issue can be recreated
kdenlive-git v15.12.0-124-gc5962be master
catalyst-libgl 15.12-1 (HD 7750)
ffmpeg 1:2.8.4-1
ffmpeg-compat 1:0.10.16-4
frei0r-plugins 1.4-3
libx264 2:148.20150725-1
mlt-git r4154.v0.9.2.376.g9e04d46-1
mlt-python-bindings 0.9.8-4
movit-git r722.4cf76ac-1
qt5-base 5.5.1-6
x264 2:148.20150725-1
xorg-server 1.16.4-1
Note: this might well be a catalyst (amd proprietary driver) issue.
Unfortunately I have no way of testing it with a different driver or GPU right
now.
Steps to reproduce:
1. Start Kdenlive
2. Create a new profile with resolution/aspect ratio 1326x888
3. Import the video clip attached to this ticket (actually, standard HD
resolution clips seem to cause the same issue).
4. Either click on clip and look at clip monitor or drag clip to timeline and
look at project monitor
Expected result:
1. Video displays correctly
Actual result:
1. Video is skewed
Notes:
1. I imagine this might have something to do with rounding mistakes(?) due to
the large aspect ratio numbers, however if you create a profile with resolution
1326x884 and aspect ratio 3:2, the same issues arise.
2. On the other hand if you duplicate a 1920x1080p 30fps profile but change the
aspect ratio to nonsense, it only affects clip monitor but project monitor
shows the video "correctly".
3. Rendering the video produces correct output.
4. In summary: this issue makes it very hard to work with non-standard
resolutions.
Possible workaround:
Use a profile that has the same fps (changing fps mid-project currently
corrupts the project) and change to the profile you actually want once you are
ready to render
Video:
https://youtu.be/ABz5-sRxgNU
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