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It was an attempt to move some MPlayer filters (which were removed from
mpv) to external, loadable filters. That worked well, but then the
MPlayer filters were ported to libavfilter (independently), so they're
available again. Also there is a more widely supported and more advanced
loadable filter system supported by mpv: vapoursynth.
In conclusion, vf_dlopen is not useful anymore, confusing, and requires
quite a bit of code (and probably wouldn't survive the rewrite of the
mpv video filter chain, which has to come at some point). It has some
implicit dependencies on internal conventions, like possibly the format
names dropped in the previous commit.
We also deprecated it last release. Drop it.
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This was required by vf_pp, which was just removed.
vf_dlopen has this stuff in its API. This API is considered stable, so
the related fields are not removed from it. But the fields are always 0
now, so there's no point in keeping the example program around.
vf_pullup.c did some extremely awkward passthrough of this information,
but didn't actually use it.
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Signed-off-by: wm4 <wm4@nowhere>
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assume yadif).
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For quiet mode: ILDETECT_QUIET=1 ildetect.sh ...
Telecine decision (guess by ildetect.so) is verified by retrying the
ildetect run with the pullup filter inserted.
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We can now turn off encoding mode by command line and use vo_null
instead.
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The filter analyzes each frame for combing, and decides at the end
whether the content is likely interlaced, telecined or progressive.
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This is now defined to mean to never output any frame again (except for
the first).
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also, default to 0-indexed frame counts (so by default, the 1st frame is
output). Old behaviour can be done by -vf dlopen=./framestep.so:42:41.
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We don't need config() ;)
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Usage: -vf dlopen=./framestep.so:5
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When the first frame of a telecine pattern did not generate an output
frame (because it is a 0 or a 1), this could lead to the first two
output frames getting equal pts values.
When the first frame of a telecine pattern generates exactly one output
frame (i.e. when the telecine pattern starts with 2 or 3), then the
output was correct before this comment, and still is unchanged.
When the first frame of a telecine pattern generates more than one
output frame (i.e. when it starts with 4 to 9), then output pts are
still broken. This is not really solvable without knowing the frame
duration, or delaying output by one frame.
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It is unix only, because vf_dlopen filters have no way to receive input (yet)
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This is done by requesting a buffer from the next filter in the chain, instead
of always allocating our own. This allows the next filter to e.g. ensure its
own preferred memory layout.
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Usage: -vf dlopen=filename.so:args...
Examples of such filters are provided in TOOLS/vf_dlopen/
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