I would do it like this:
producer1producer2producer3producer4playlist1 producer1 blank producer3
blank
playlist2
blank
producer2 blank producer4tractor playlist1 playlist2 transition1
transition2 transition3
The key will be setting the length of the blank entries and the in/out points
of the transitions. A really easy way to see this in action would be to use
KDENLIVE or Shotcut to make a slideshow using two tracks and transitions and
then look at the xml that they produce.
~Brian
From: Jeremy Yoder <jmyo...@gmail.com>
To: Dan Dennedy <d...@dennedy.org>
Cc: mlt-devel <mlt-devel@lists.sourceforge.net>
Sent: Friday, January 9, 2015 6:51 AM
Subject: Re: [Mlt-devel] Can I use any transitions besides luma for a pixbuf
slideshow?
I'm generating an MLT file from a collection of images but there are about 20
different ways I've seen to do it. The simplest seemed to be to put all the
images in a playlist rather than dealing with multiple tracks/multitrack. I
didn't think about the transition problem until I thought I was "done".
Yes, I can get different transitions to work using luma and gradient images. I
can set the in/out of the different luma filter sections to get a different
effect between each image. That works fine. I just thought I could use other
filters as transitions between images when I started.
So if you were going to format an MLT file for a slideshow only, how would you
do it? Right now, like I mentioned, I
have:producer1producer2producer3producer4playlist producer1 producer2
producer3 producer4 filter1 luma filter2 luma filter3 luma
On Thu, Jan 8, 2015 at 1:12 PM, Dan Dennedy <d...@dennedy.org> wrote:
On Thu, Jan 8, 2015 at 7:42 AM, Jeremy Yoder <jmyo...@gmail.com> wrote:
Looking at the list of filters it looks like "luma" is the only one that will
take the current and next frame as input. Is there any way to accomplish the
same thing with other transitions, like "composite" or "affine" (maybe using
the "transition" filter somehow?).
Per the subject line, are you basing this question on demo/mlt_slideshow [1]?
If so, I consider that just a cute hack with a quick dead end as it offers
little-to-no control. To answer your question, i think the answer is "no." Of
course, you can probably specify a gradient wipe image file to the luma filter
to get a different type of transition. However, you are better off to write a
tool or script that generates MLT XML from your set of images. Maybe you give
that tool a list of images as a newline-delimited text file. At the very least
you now have more control over image file selection and order. Maybe turn that
text file into tab- or CSV-delimited and add a column that specifies whether to
apply a center crop operation for that image. Next, add a column for the
transition type. You see what I mean?
[1] https://github.com/mltframework/mlt/blob/master/demo/mlt_slideshow
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