The option chapter is based on the avoptions_codec.texi auto-generated
file.

The file name can be set by setting the FFREPORT environment
variable to "file=something".

Fix trac ticket #1823.

This function does the low-level work of av_opt_set_from_string()
but can be used when there is no option context or when a generic
handling of unknown keys is needed.

av_opt_set_from_string() is changed to make use of it.

Wording suggested by Stefano Sabatini, should have been
merged with the previous commit.

The option belongs to libavcodec, so it results duplicated in the file.

Documentation includes only the externally visible API of the installed
headers.

Based on a patch by Anton Khirnov <anton@khirnov.net>.

Signed-off-by: Anton Khirnov <anton@khirnov.net>

This location contains prebuilt binaries as well.

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

Should help to clarify escaping issues in the filtergraph syntax. In
particular, should address trac ticket #1813.

The native filter was ported from the MPlayer project when the mp
wrapper didn't even exist, and when mp=hqdn3d was added, it was already
obsolete.

All the rectangle features have been ported to the native drawbox filter,
which has an equivalent syntax.

Based on a libmpcodecs/vf_rectangle.c feature.

The filter has been ported to a native libavfilter filter.

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.

Same functionality is provided by libswscale.

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

The filter is useless, swscale should be used instead.

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

It can be useful for debugging.

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

Update path handling against the latest Frei0r specification changes.

Signed-off-by: rogerdpack <rogerpack2005@gmail.com>
Signed-off-by: Stefano Sabatini <stefasab@gmail.com>

If the first argument can be read as a video size, set that output size
in the scale. This allows to specify in a filtergraph scale=qcif or
scale=320x240.

This is not completely safe, for example in case of a typo in the video
size string the first argument will be read as the input width
expression, giving rise to a confusing comment.

Also update documentation accordingly.

Plain text (utf8 encoded) data can be muxed and demuxed in nut.

They are essential to be able to use the utils without av_malloc()
That is for example use with malloc(), memalign(), some other
private allocation function, on the stack or others.

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

This avoids Doxygen believing the attribute is the function name.

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

By default, fps selects frames near PTS 0, 0.5, 1.5, 2.5, etc.
With round=down, it selects the frames near PTS 0, 1, 2, 3, etc.

I cannot find a reason for such a rule, which was resulting in badly
escaped filtergraph snippets.

Fix trac ticket #1610.

They dont work at all and trash the output totally
also they are unmaintained -> that is if you want to maintain them
contact us !

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

Allow to factorize code in video_decode_example(), simplify.

Allow to specify a filename where to put the filtergraph description.

This is useful to override limitations or glitches of particular shell
environments, and allows a level of indirection for specifying
filtergraphs.

This adds support for building on Plan 9 x86-32.  The compat/plan9
directory contains these items:

- replacements for the 'head' and 'printf' shell commands
- wrapper for main() to disable FPU exceptions

Larger required changes to the system are described in the
documentation.

Signed-off-by: Mans Rullgard <mans@mansr.com>