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.

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

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.

Building libavfilter without that functionality makes little sense.

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>

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

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

The following commit will make it useless.

The crop_scale_vflip FATE test changes because of off-by-one differences
in output when vflipped slices are passed to sws.

The filter is a port of libmpcodecs/vf_field.c, since there is no common
code I relicensed it as LGPL, while keeping the original author
copyright.

It can be useful for debugging.

Based on a patch by Stefano Sabatini <stefano.sabatini-lala@poste.it>

They are part of the public API. Their libav compatibility
counterpart are already enabled unconditionally.

With this change avconv compiled against libav and linked to ffmpegs libs
will run through the whole fate testsuite without any crashes.
857 tests pass, the remaining tests fail one way or another, which is
to be expected as avconv is not a drop in replacement for ffmpeg
The testsuite used was the ffmpeg fate testsuite, not libavs.

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

This filter is based on the MPlayer decimate filter by Rich Felker.

This is a port of the MPlayer smartblur filter (libmpcodecs/vf_smartblur.c)
by Michael Niedermayer.

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

This filter is inspired upon libmpcodecs/vf_framestep.c, by Daniele
Forghieri.

Only-keyframe output is not supported, since that feature can be achieved
through the more versatile select filter.

Signed-off-by: Martin Storsjö <martin@martin.st>

This is a port of the MPlayer hue filter (libmpcodecs/vf_hue.c) by
Michael Niedermayer.

Signed-off-by: Jérémy Tran <tran.jeremy.av@gmail.com>
Signed-off-by: Stefano Sabatini <stefasab@gmail.com>

Based on an idea by Andrey Utkin <andrey.krieger.utkin@gmail.com>.

Patch readapted by Stefano Sabatini, color values proposed by Tim
Nicholson <nichot20@yahoo.com>.

Address trac ticket #1462.

See thread:
Subject: [FFmpeg-devel] [PATCH] smptebars filter
Date: Wed, 20 Jun 2012 01:54:58 +0000

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

Since the recent changes, movie and amovie are able to deal with more
than one type of stream, so they should be categorized as "multimedia
sources" rather than audio/video sources.

These filters are designed for storing and transmitting video sequences
with alpha using higher-efficiency codecs such as x264 which don't
natively support an alpha channel. 'alphaextract' takes an input stream
with an alpha channel and returns a video containing just the alpha
component as a grayscale value; 'alphamerge' takes an RGB or YUV stream
and adds an alpha channel recovered from a second grayscale stream.

Signed-off-by: Steven Robertson <steven@strobe.cc>
Signed-off-by: Stefano Sabatini <stefasab@gmail.com>

Inspired by MPlayer's af_channels filter and SoX's remix effect.

It joins multiple input streams into one multi-channel output.

Add atempo audio filter for adjusting audio tempo without affecting
pitch. This filter implements WSOLA algorithm with fast cross
correlation calculation in frequency domain.

Signed-off-by: Pavel Koshevoy <pavel@homestead.aragog.com>
Signed-off-by: Stefano Sabatini <stefasab@gmail.com>

This filter changes the number of samples on single output operation.

Based on a patch by Andrey Utkin <andrey.krieger.utkin@gmail.com>.