Stephan wrote:
Let the project ratio be PAL for exemple (4:3):
The source is 4:3 in your video track, now, simply resize the timeline
of the video (right mouse menu on the video track) to the height 405
(720x405 is 16/9). So you have your 16:9 with black bars and
everything is centered (the resize is really a crop). If you need go
back to 4:3, simply resize the timeline to the project size.
Et voilà ;^)
This method requires 1 less effect so I like it. Does it mess up the
interlacing in the same way as the translation effect? 405 is an odd
number which worries me...
Hermann thanks for the explanation of cinelerra behaviour. I regularly
change the aspect of still images before importing but I never realised
this issue effected all media in cinelerra.
his leads to some additional problems,
e.g. if you use a circular gradient effect, it gets stretched out
as ellipse
I suppose this means the circles applied on my 4:3 footage are also
ellipses by about 7%.
A nice new feature inded /would be/ the ability to insert such a strech
effect automatically on some media in the project, even before it is
So we could have a manually operated 'render path manager' (perhaps
reached by clicking a button in the Format dialogue) which shows options:
*apply a stretch to raw media (use 16:9 footage in 4:3 project, using
4:3 footage in 16:9 project, still photo in PAL frame, custom stretch etc.)
*double the frame rate and apply frames to fields on raw media - this
will correct the functioning of various effects when working with
interlaced footage but will slow down the pipeline.
Obviously those are too many words... Anyway I can see such a thing
being really useful and a step towards ...a more extensive render path
manager. I guess eventually all the media and project information could
be on a "render path" dialogue attached to each media asset (right click
on the media in the assets I guess) with media info on the left and
project info on the right side. Cinelerra could show at the bottom of
the dialogue how it proposes to manage the interlacing and aspect ratio
issues in the pipeline and the user could manually tweak any parts of
the pipeline they wish.
Is that a canonical solution?
Anyway something new in cinelerra to help deal with these issues would
be a fine enhancement. Good luck!
Graham E
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