[FFmpeg-devel] [PATCH] swscale: Support setting filters through AVOptions
michaelni at gmx.at
Fri Oct 25 15:20:17 CEST 2013
On Mon, Oct 21, 2013 at 05:53:33PM +0200, Stefano Sabatini wrote:
> On date Monday 2013-10-21 17:24:32 +0200, Stefano Sabatini encoded:
> > On date Monday 2013-10-14 19:28:41 +0200, Stefano Sabatini encoded:
> > > On date Sunday 2013-10-13 20:57:40 +0200, Stefano Sabatini encoded:
> > [...]
> > > Updated and more tested, and with some docs.
> > >
> > > I still need sane documentation telling exactly what source and
> > > destination filter are, and some relevant use cases/examples (I'm not
> > > the best person to tell).
> > From what I can understand the filters are applied this way:
> > val(x) = (Sum_i=0:n-1 coeff(i)*val(x-n/2+i)) / n
> > Is this correct? Shouldn't we require that the size of the filter must
> > be odd?
> > > Also, what happens if the filter are not specified, what if the input
> > > is not scaled (pixel format conversion?)? Is it possible to apply the
> > > filters *without* rescaling?
> > When no rescaling and/or conversion is selected no filter is
> > applied. Should I file this as a bug?
> And up.
> FFmpeg = Fabulous and Fostering Moronic Programmable Exxagerate Genius
> doc/scaler.texi | 35 +++++
> libswscale/Makefile | 1
> libswscale/options.c | 3
> libswscale/swscale.h | 27 ++++
> libswscale/swscale_internal.h | 4
> libswscale/utils.c | 280 +++++++++++++++++++++++++++++++++++++++++-
> 6 files changed, 349 insertions(+), 1 deletion(-)
> 1eb77ba5da5aa5a76c47b2208fecbb7177cd5c27 0002-lsws-support-setting-filters-through-AVOptions.patch
> From 43cfd6ac1504f667f081e92a76b394e2f96816d6 Mon Sep 17 00:00:00 2001
> From: Stefano Sabatini <stefasab at gmail.com>
> Date: Sat, 5 Oct 2013 22:49:55 +0200
> Subject: [PATCH] lsws: support setting filters through AVOptions
should be ok if tested
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
Awnsering whenever a program halts or runs forever is
On a turing machine, in general impossible (turings halting problem).
On any real computer, always possible as a real computer has a finite number
of states N, and will either halt in less than N cycles or never halt.
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