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|ID||Project||Category||View Status||Date Submitted||Last Update|
|0002015||Kdenlive||Effects||public||2011-02-13 18:24||2011-11-01 18:56|
|Priority||normal||Severity||minor||Reproducibility||have not tried|
|Platform||64bit Maverick Meerkat||OS||Sunabs svn PPA||OS Version|
|Product Version||Recent git|
|Target Version||Fixed in Version||0.8.2|
|Summary||0002015: Crop Effect - Cropping parameters don't seem to work correctly|
|Description||I'm trying to create a typical 2:35:1 frame 806 high out of 1080P frame by simply setting a top crop of 131 & a bottom crop of 132 but just adding the first crop to the top immediately gives me a 60 pixel crop top and bottom and scales the image up. This is without the Auto Centre Crop Ticked.|
I can the frame is scaled up because if I extract the cropped frame and overlay it in Gimp on the same frame extracted without the crop active, set the opacity to 50% I see strong ghosting clearly showing the cropped frame has been scaled up.
|Additional Information||I've got to say I think that any auto scaling by default on any of the effects is totally wrong and hope this is a bug not a default. Although I see similar auto scaling with Pan & Zoom which also doesn't appear to work correctly, I've reported that on a separate bug report.|
Any auto scaling operation for any filter/effect/import really should be off by default and implicitly 'switched on' or applied if required by the user
|Tags||No tags attached.|
|Build/Install Method||3rd party package|
Unable to reproduce.
Cropping from top centers the frame but nothing is removed from the bottom.
Using the same packages as yellow.
Using 1080p footage.
Cropping 131 pixels on top -> 131 pixels removed from top (nothing is removed from bottom), the frame it automatically centered resulting in equal top/bottom 65 pixels black borders. This behavior is only expected if "Auto center crop" is ticked, but it's not. For me that is the issue.
But i don't see any kind of scaling.
By the way it seems I found another bug using crop and proxy files (I will open a new bug report).
This is by design. It is edge cropping. After taking N from the top, the aspect ratio no longer is the same, so it is padded to fill the frame by centering the image. It is not cropping N/2 from opposing edges; it only takes it from the edge you request.
Overall it works like this: crop edges as requested from the source image, deinterlace if needed, scale to project resolution while keeping aspect ratio, center and pad with black. Then, all other effects are applied. I am sorry if you do not like it, but that is the design of MLT, take it or leave it.
|2011-02-13 18:24||yellow||New Issue|
|2011-03-04 23:18||ttill||Note Added: 0006534|
|2011-03-04 23:18||ttill||Status||new => feedback|
|2011-03-05 15:51||sunab||Note Added: 0006543|
|2011-03-12 01:15||ddennedy||Note Added: 0006567|
|2011-03-12 01:15||ddennedy||Status||feedback => resolved|
|2011-03-12 01:15||ddennedy||Resolution||open => won't fix|
|2011-03-12 01:15||ddennedy||Assigned To||=> ddennedy|
|2011-07-05 12:15||j-b-m||Fixed in Version||=> 0.8.2|
|2011-11-01 18:56||j-b-m||Status||resolved => closed|
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