Based on the libavfilter SOC filter by Vitor Sessak, with the following additions:
* integer arithmetic
* bilinear interpolation
* RGB path
* configurable parametric angle, output width and height
Address trac issue #1500.
See thread:
Subject: [FFmpeg-devel] [WIP] rotate filter(s)
Date: 2010-10-03 17:35:49 GMT
With the introduction of AVFilterContext->is_disabled, we can simplify
the custom passthrough mode in filters.
This commit is technically a small compat break, but the timeline was
introduced very recently.
Doxy by Stefano Sabatini.
From various tests, there is no evidence that the filter is faster than
the native tinterlace, and it has several more limitations and a few
bugs.
See thread:
Subject: [FFmpeg-devel] [NOPATCH] lavfi/mp: drop tinterlace wrapper
Date: Wed, 5 Sep 2012 00:26:01 +0200
Same funcionality is provided by stereo3d=ab[2]{l,r}:sbs[2]{l,r}.
Additional "features" are barely useful and cause crash or artifacts.
Signed-off-by: Paul B Mahol <onemda@gmail.com>
The next commit will introduce a proper decimation filter to be used
along with the field matching filter. To avoid confusion with this
filter which has currently a very limited usage (and will not work
properly with the fieldmatching filter), the new decimation filter will
take the decimate name, and this filter is renamed to mpdecimate.
This also drops support for "flat syntax" and "reinit" command.
"reinit" command is not very robust and complicates the logic more than
necessary, since requires to reset all the options in the command.
*This is a syntax break*.
Since we do not support "standalone" filters not attached to an
AVFilterGraph, we should not have a public function to create such
filters. In addition that function is horribly named, the action it does
cannot be possibly described as "opening" a filter.