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

ffmpeg-devel at ballcam.com ffmpeg-devel at ballcam.com
Mon Nov 26 00:33:53 CET 2012

Michael Niedermayer <michaelni at gmx.at> wrote:

> On Fri, Nov 23, 2012 at 01:59:55AM -0600, ffmpeg-devel at ballcam.com wrote:
> [...]
> > 
> > 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.
> sure, we would like to, code to do rotations exists already in
> libmpcodecs/vf_perspective, that needs to be ported to libavfilter
> and then used by rotate to give a clean user interface
> Do i understand your message in that you want to do that coding work?
> or you want to donate to ffmpeg in exchange for someone else doing
> it?
> iam not sure, i understand you exactly here ...
> Thanks
> [...]
> -- 
> Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
> Democracy is the form of government in which you can choose your dictator

Not sure at this point. Could go either way.

I looked briefly at the code you mentioned.
Not sure exactly how it works, at this point.

I used Leptonica because it was easy to implement, with files,
but maybe not so easy to integrate when not writing out and reading in files.

I will also be looking at the source for ImageMagick. Leptonica seems
a bit too slow to rotate each frame using the Gumstix CPU. I am not sure at 
this point if the code is taking advantage of any additional DSP or GPU 
that the Omap CPU may have.

I have put this product up on IndieGoGo, so there may be some cash.
I will be updating the YouTube page, and the IndieGoGo page shortly with
some demo videos.

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