[FFmpeg-devel] [PATCH] extractplanes filter

[Lou Logan]

On Thu,  2 May 2013 16:37:50 +0000, Paul B Mahol wrote:

> Signed-off-by: Paul B Mahol <onemda at gmail.com>
> ---
>  doc/filters.texi               |  38 +++++++
>  libavfilter/Makefile           |   1 +
>  libavfilter/allfilters.c       |   1 +
>  libavfilter/vf_extractplanes.c | 220 +++++++++++++++++++++++++++++++++++++++++
>  4 files changed, 260 insertions(+)
>  create mode 100644 libavfilter/vf_extractplanes.c
> 
> diff --git a/doc/filters.texi b/doc/filters.texi
> index a62d977..91d5262 100644
> --- a/doc/filters.texi
> +++ b/doc/filters.texi
> @@ -3320,6 +3320,44 @@ Example:
>  edgedetect=low=0.1:high=0.4
>  @end example
>  
> + at section extractplanes
> +
> +Extract color channel components from input video frames into
> +separate grayscale video frames.
> +
> +The filter accepts the following option:
> +
> + at table @option
> + at item planes
> +Flags which maps to planes to extract.

Set plane(s) to extract.

> +Available values for planes are:
> + at table @samp
> + at item y
> + at item u
> + at item v
> + at item a
> + at item r
> + at item g
> + at item b
> + at end table
> +
> +Note that it is error to select plane(s) which are not available in
> +input frame.

Perhaps something like:
Choosing planes not available in the input will result in an error.

or:

Plane(s) not available in the input frame cannot be selected.