On Mon, 24 Feb 2020, Nicolas George wrote:
Michael Niedermayer (12020-02-24):
No, they can't: being the same subtitle or not is part of the semantic.
Does anyone else share this oppinion ?
iam asking because we need to resolve such differences of oppinion to
move forward.
Theres no way to design an API if such relativly fundamental things
have disagreements on them
It's not a matter of opinion, it is actually quite obvious:
# 1
# 00:00:10,000 --> 00:00:11,000
# Hello.
#
# 2
# 00:00:11,000 --> 00:00:12,000
# Hello.
… means that two people said Hello in quick succession while:
That is not the real issue (although the normally used techniques to
signal different speakers is coloring, alignment or simply putting both
sentences in a single subtitle).
The real issue is that for animations like \move{} the rendering cannot be
splitted. So it seems if we want to support animations, hard splitting is
not an option.
Some subtitles have overlap all over the place. I am thinking in
particular of some animé fansub, with on-screen signs and onomatopoeia
translated and cultural notes, all along with dialogue. De-overlapping
would increase their size considerably, and cause actual dialogue to be
split, which results in the problems I have explained above.
But I don't know why you are so focussed on this. Overlapping is not a
problem, it's just something to keep in mind while designing the API,
like the fact that bitmap subtitles have several rectangles. It's
actually quite easy to handle.
My problem with overlapping is that in order to render subtitles
at a given time you need more than one AVSubtitle. That is a
fundamental difference to audio or video AVFrames where a single object
fully represents the media at a given time.
Maybe we should deal with collections of AVSubtitles which affect time
durations, this way you don't need to hard-merge the subtitle rectangles
but still can reference objects which fully describe subtitles for a
time period.
Regards,
Marton
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