Partially rework the iteration logic, in order to limit iteration only
for the clipped overlay region.

The filter has been natively integrated into libavfilter.

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Allow to select sample rates.

Signed-off-by: Paul B Mahol <onemda@gmail.com>

In particular, fix misbehavior in case main and overlay input formats
mismatch (e.g. YUV420 and YUV444).

Force termination when the overlay stream ends. Simplify scripting logic,
for example when an infinite source is used to generate a background for
a composite video.

The filter has been natively integrated into libavfilter.

The native filter is equivalent from the point of view of the features
and of performances.

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Also update the documentation accordingly, and suggest a meaningful range.

In particular, avoid out-of-buffer access and crashes with too big
values, and rework documentation accordingly.

Native il video filter is now available.

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Adds allpass, bass, bandpass, bandreject, biquad,
equalizer, highpass, lowpass and treble filter.

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

This is a port of virtual dub's histogram equalization filter by Donald
A. Graft. Based on the work by Jérémy Tran <tran.jeremy.av@gmail.com>,
done for SOCIS 2012.

This is a port of the kerndeint filter (libmpcodecs/vf_kerndeint) by
Donal A. Graft (original avisynth plugin author), and is based on the
work by Jérémy Tran <tran.jeremy.av@gmail.com> done for SOCIS 2012.

Also rename the "enable_auto" field to "deint", to match the name of the
option.

Signed-off-by: Stefano Sabatini <stefasab@gmail.com>

Native pp filter is available.

postproc dependency is also dropped from mp wrapper since it was the
only filter needing that dependency.

Ported from MPlayer. Original author is A'rpi, with various
contributions from Michael Niedermayer. The original documentation was
mostly written by Diego Biurrun. See the MPlayer history for full
credits.

The filter is under GPL like the original filter, even if it differs
quite a lot. There is not much point in making it LGPL since pp is under
GPL.

Simplify.

This breaks usage for out-of-range values.

This will prevent an overflow in the SSSE3 and MMX filter_line code:
delta is expressed as an u16 being shifted by 2 to the left. If it
overflows, having a strength not above 64 will make sure that m is set
to 0 (making the m*m*delta >> 14 expression void).

A value above 64 should not make any sense unless gradfun is used as a
blur filter.

This filter pads an audio stream with silence
It can together with -shortest be used to extend audio streams to
the same length as video.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Also fix documentation accordingly.

Add options introspection, and improve error feedback.

hqdn3d was meant to be a more efficient denoise3d filter, is supported
natively, and is faster on my computer thanks to the ASM optimisations.

Justin's version has more features but is otherwise equivalent from the
point of view of the syntax.

Simplify code, and provide introspection through the AVOption system.

Based on the volume filter in FFmpeg written by Stefano Sabatini
<stefasab@gmail.com>.