[vlc-devel] Re: [PATCH] Sharpen video_filter

xxcv xxcv07 at gmail.com
Sun Feb 4 12:41:40 CET 2007

Nice sharpen filter
I think a reasonable sigma default value should be .05
> Ok. Yet another change thanks to dionoea.
> Main change is about sigma that has been moved to the struct, and 
> about v1 and v2 that are declared as static.
> And v2 is no more 8, but 3... (* 8 .. <<3)
I tried sharpen on a HD video clip and indeed its choppy :)

libmpeg2 debug: 1920x1088 (display 1920,1088), aspect 768000, sar 
136:135, 29.971 fps
main warning: Fixing broken HDTV stream (display_height=1088)

> It can be accelerated a bit more, especially because the 
> int->float->int, but well, this patch should be ok.
How efficient is sharpen when using it on interlaced vs progressive HD 
video clip ?
> +    p_outpic->i_nb_fields = p_pic->i_nb_fields;
> +    p_outpic->b_progressive = p_pic->b_progressive;
> +    p_outpic->b_top_field_first = p_pic->b_top_field_first;
Thanks for this very useful filter :]

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