Hi Dan (and anyone else),
You may remember me from this thread:
http://www.kinodv.org/dcforum?az=show_topic&forum=101&topic_id=2491&mesg_id=2491&page=#3030
Now that I'm forced to move away from Kino, I went searching to see if anyone
has put any work into this feature for other NLEs. I didn't find anyone working
on it, but I found some requests:
Openshot:
http://www.openshotusers.com/forum/viewtopic.php?f=27&t=528
Kdenlive:
http://www.kdenlive.org/mantis/view.php?id=643
http://www.kdenlive.org/mantis/view.php?id=1588
http://www.kdenlive.org/mantis/view.php?id=1597
http://www.kdenlive.org/forum/can-kdenlive-display-datetime-info
So I'm here to offer my services to get this feature implemented. I can write
the code and test it if someone can help me produce a design that will fit into
the MLT framework and can be accepted into the main codebase.
The plan I have in mind is as follows:
1) Implement a dynamic title feature in MLT that provides access to metadata
that is available from the file attributes that don't require understanding the
codecs within the file (filename, modification date, etc).
2) Implement the feature in Kdenlive and Openshot
3) Extend libav to extract timecode and date/time metadata from applicable
codecs and make it available in the API.
4) Extend MLT to support the new timecode and date/time metadata provided by
libav for dynamic titles.
After these steps, Kdenlive and Openshot would match the current dynamic title
functionality of Kino.
I started to examine the MLT source to get an idea of what it would take to
implement this feature. I see that titles are typically generated using the
Gtk2 Pixbuf producer. So it stands to reason that we can simply extend the
implementation to support dynamic text which can be replaced in an SVG file,
and the pixbuf can be re-rendered with each frame using new text. After some
examination, I think I understand what makes this request non-trivial. The
producer has no knowledge of other producers. So there is no way for the pixbuf
producer to know the creation date of file being used by an other producer.
Maybe there is some hidden trick that I don't know about. Or maybe the feature
needs to be implemented as a transition so that it has access to the frames
that it is being mixed with.
So, that's where I'm at. I hope you can afford some time to engage in a dialog
about how this can be implemented. Maybe you already have something in mind.
Please let me know how we can proceed from here.
Regards,
~Brian
------------------------------------------------------------------------------
WhatsUp Gold - Download Free Network Management Software
The most intuitive, comprehensive, and cost-effective network
management toolset available today. Delivers lowest initial
acquisition cost and overall TCO of any competing solution.
http://p.sf.net/sfu/whatsupgold-sd
_______________________________________________
Mlt-devel mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/mlt-devel
