On 2/14/17, Daniel Oberhoff <danieloberh...@googlemail.com> wrote:
> filter strictly "halves" the image efficiently, which is often exactly what
> is needed
> likely much faster than using scale
> fully slice parallelized
>
> Signed-off-by: Daniel Oberhoff <dan...@danieloberhoff.de>
> ---
>  libavfilter/Makefile     |   1 +
>  libavfilter/allfilters.c |   1 +
>  libavfilter/vf_halve.c   | 367
> +++++++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 369 insertions(+)
>  create mode 100644 libavfilter/vf_halve.c
>

I see big cargo cult here.

No need to use framesync for 1-1 case.
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