[FFmpeg-devel] [ANNOUNCE] New Commercial Product Using FFMPEG - Thanks To Developers.

Michael Niedermayer michaelni at gmx.at
Mon Nov 26 02:41:32 CET 2012

On Mon, Nov 26, 2012 at 12:50:23AM +0100, Stefano Sabatini wrote:
> On date Friday 2012-11-23 01:59:55 -0600, ffmpeg-devel at ballcam.com encoded:
> [...]
> > libavfilter was originally considered to do the unrotating,
> > but as far as it is understood at this time, the rotate
> > filter only works in 90 degree increments. (Currently
> > FFMPEG-1.0 is used, and unless there is a need to use 
> > a later commit, point-releases will be used).
> > 
> > If the FFMPEG team would like to include arbitrary angular
> > rotation as part of the rotate libavfilter, please respond as 
> > such to this message, and BallCam Technologies Inc. may
> > pursue that as part of its contribution.
> Check the (still flawed) vf_rotate.c filter in the archive. The
> rotation angle may be injected through the metadata API into each
> frame.

but make sure you do not use some nearest neighbor code, its very bad
quality and will be rejected if submited that way.
the vf_perspective code is doing proper linear and cubic interpolation
vf_rotate did nearest neighbor at some point IIRC, i dont know if the
last patch still did

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Into a blind darkness they enter who follow after the Ignorance,
they as if into a greater darkness enter who devote themselves
to the Knowledge alone. -- Isha Upanishad
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