720P Project Using 1080P clips. Looking to do keyframed Crop and Pan within 1080 frame.

Sorry must be missing something I can't get it to work like that.

I've followed your instructions, using a 720P project, import my 1920x1080 shots, drop one on the timeline, apply Pan & Zoom and I get a 1280x720 frame of the source video in top left corner a dotted red box of 1920x1080 size and a 1920x1080 yellow box. Moving the yellow box just chops off some of the 1280x720 frame. It gives the opposite of what I'm after. Bug?

Using latest svn from Sunabs PPA.

Thanks for the screencast, it really helps show what should happen but that's not what I see, I get a 1920x1080 yellow frame and 1280x720 image and a 1920x1080 red box, no image resizing on changes. That was using sunabs svn build about a week old, i know jbm has made changes to the code in the last day or two. Is your screencast from latest svn.

I'll try again this evening, hopefully sunabs PPA has updated recently too.

Ok, it's a bug I think, my 720P 25fps profile is fine.

What happens is that my default project is a 1080P. So starting kdenlive gives a 1080P project, immediately doing New Project and choosing 720P, adding my 1920x1080 source, then Pan & Zoom Effect, the P&Z effect uses the previous project settings ie 1920x1080 as it's 100% frame size rather than 1280x720.

However if I set my default project as a 720P, then do the process above, I get what is in the screencast.

So it's a bug i think, heading for the bug tracker. Dan do you see the same starting with a 1920x1080 project, but immediately closing it and starting with a 720P in the same kdenlive session? Same issue with extract frame option, that also uses wrong resolution in this scenario.

Also if I extract my 720P 'crop' from a 1080 frame and then overlay it in Gimp over the same frame but from a 1080P project, ie the non 'cropped' frame and zoom 400% the quality of the 720P frame is terrible alongside the full 1080P frame. If it was a simple crop the quality would be the same.

So the Pan & Zoom appears not to be doing what I asked in the intial post, which was to do a keyframed 720P crop from a 1080P frame. I'm using the extract frame option to get the images btw.

It doesn't appear that it's actually cropping, its scaling down the 1080 frame automatically on import to fit a 720P project, then I'm having to resize the scaled down source by 150% to get back to where I started at, 1080P, in order to get the framing I'm after at 720P, so scaling a second time, rather than actually cropping.

So it doesn't appear 'that simple'. Going back to original comment, a keyframable crop effect would be good. :-) Might be a good place for me to start coding a plugin. :-)

I think automatic scaling by default is really unhelpful and has the potential to degrade quality without realising, it's also common to use different interpolation methods for downsizing and upscaling, it would be so much simpler to be able to import any mixture of resolution sources into a project where the chosen project resolution just provides a frame in which to position the source media to suit and then previews and renders what is seen in the frame not outside of it, then apply whatever transforms in x & y, cropping, panning, scaling etc as required to the individual sources, they could pass across and outside the project frame rather than been scaled to fit it all the time. Is the term, 'resolution independent'?