On Wed, Feb 19, 2014 at 03:15:40AM +0100, Vittorio Giovara wrote:
> --- a/doc/filters.texi
> +++ b/doc/filters.texi
> @@ -1426,7 +1426,8 @@ a float number which specifies chroma temporal 
> strength, defaults to
>  
>  Simple interlacing filter from progressive contents. This interleaves upper 
> (or
>  lower) lines from odd frames with lower (or upper) lines from even frames,
> -halving the frame rate and preserving image height.
> +halving the frame rate and preserving image height. A vertical lowpass filter
> +is always applied in order to avoid twitter effect and reduce moire patterns.

This is ungrammatical, choose one of

  to avoid twitter effect_s and reduce moire patterns.

  to avoid _the_ twitter effect and reduce moire patterns.

  to avoid _a_ twitter effect and reduce moire patterns.

LGTM otherwise.

Diego
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