Andraz Tori wrote:
On čet, 2006-01-19 at 22:57 +0100, Herman Robak wrote:
  
How should cinelerra know that it should change
the size of the tracks also.
      
  Cinelerra is a program.  It does not "know" anything.  The developers,
on the other hand, should know a bit about the user's motivation:

* What does the user want when he changes the project setting from NTSC
resolution (the hardcoded default) to PAL resolution?

- He wants as much as possible to appear in a suitable way for PAL
resolution.  For the _PAL_ tracks that he has already loaded, it makes
sense to show them in _PAL_ resolution, that is in the project canvas
size.  No black bars.  No need to fiddle with right-click menus on
each and every track afterwards.
    
In my experience, many programs (such as gimp, powerpoint programs, other video editing programs I recall playing with)  expect you to specify the resolutions before you do anything.  This is where the issue really comes from: people adding footage, and suddenly going, "oops... I started with the wrong resolution".  Once a user of cinelerra has made this mistake once, he/she should learn from it, and likely never do it again (I know that it's one of the first things I check before adding footage to cinelerra).
  That is what most users likely want in that scenario.  Can you come
up with common counter-examples?
    


Yeah, track size is more or less independant of the project size, there
are many uses where you want track size completely different than
project size - especially when doing compositing.

Therefore you can not know what the user wants.
  
I strongly second this opinion.  For specific cases:

Consider the case where you have a video of a presentation, and then still images (such as png's from a openoffice Impress export to html option) that are presentations slides that you overlay onto of the video.   Then you render to PAL, and subsequently change to a different size (say for a different aspect ratio)   When changing the project output size, I don't want the size of the tracks containing the slides to suddenly change on me, as the size of the slides is fixed!  Also the size of the track is usefully for cropping the media before it is presented on the canvas, why would you want this to change?

Another example is video from my digital photo camera (i.e. 320x200 footage) that I decide to include in an overseas trip video.  I like to only be processing the area (320x200) being transferred to the canvas, and not the entire 720x576.

Pierre

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