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IDProjectCategoryView StatusDate SubmittedLast Update
0003249KdenliveEffectspublic2014-03-29 21:032014-09-22 22:40
Reportervarchar 
Assigned Tovpinon 
PrioritylowSeverityfeatureReproducibilityN/A
StatusresolvedResolutionwon't fix 
Platform64 bitOSGentoo LinuxOS Version
Product Version 
Target VersionFixed in Version 
Summary0003249: Add scaler choise to all filters that scale
DescriptionIntepolator selection (like in "Corners" effect ), or at least info somewhere about used interpolator. By the way, what algo used now in filters that scales - bilinear/bicubic? I hope...
TagsNo tags attached.
Build/Install Method(select)
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-  Notes
(0010355)
vpinon (administrator)
2014-09-22 15:36

Dan I can't find this kind of info in MLT filters documentation, do you have a quick answer?
Thanks!
(0010359)
ddennedy (developer)
2014-09-22 18:29

The image scalers follow a "rescale" property set on the consumer that roughly follows:
http://www.mltframework.org/bin/view/MLT/ConsumerAvformat#rescale [^]

The avformat consumer defaults to "bilinear" while SDL defaults to "nearest".
In addition, we use the consumer rescale property in MLT as a global hint for the interpolation setting of other filters and transitions. But they usually only implement a subset, typically nearest neighbor and bilinear, sometimes bicubic:
https://github.com/mltframework/mlt/blob/master/src/modules/plus/transition_affine.c#L558 [^]

Many things are implemented in frei0r and those must be exposed as a parameter because there is no standard way to name that parameter. I am not volunteering to add interpolation methods for any and all filters that do spatial transformation.

- Issue History
Date Modified Username Field Change
2014-03-29 21:03 varchar New Issue
2014-09-22 15:35 vpinon Assigned To => ddennedy
2014-09-22 15:35 vpinon Status new => assigned
2014-09-22 15:36 vpinon Note Added: 0010355
2014-09-22 15:36 vpinon Status assigned => feedback
2014-09-22 18:29 ddennedy Note Added: 0010359
2014-09-22 22:40 vpinon Status feedback => resolved
2014-09-22 22:40 vpinon Resolution open => won't fix
2014-09-22 22:40 vpinon Assigned To ddennedy => vpinon


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