@@ -7005,6 +7005,13 @@ Default value is @samp{init}.

 @item dither

 Set dithering to reduce the circular banding effects. Default is @code{1}

 (enabled).

+

+@item aspect

+Set vignette aspect. This setting allows to adjust the shape of the vignette.

+Setting this value to the SAR of the input will make a rectangular vignetting

+following the dimensions of the video.

+

+Default is @code{1/1}.

 @end table

 @subsection Expressions

@@ -18,6 +18,8 @@

  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  */

+#include <float.h>  /* DBL_MAX */

+

 #include "libavutil/opt.h"

 #include "libavutil/eval.h"

 #include "libavutil/avassert.h"

@@ -65,6 +67,8 @@ typedef struct {

     float xscale, yscale;

     uint32_t dither;

     int do_dither;

+    AVRational aspect;

+    AVRational scale;

 } VignetteContext;

 #define OFFSET(x) offsetof(VignetteContext, x)

@@ -81,6 +85,7 @@ static const AVOption vignette_options[] = {

          { "init",  "eval expressions once during initialization", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_INIT},  .flags = FLAGS, .unit = "eval" },

          { "frame", "eval expressions for each frame",             0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = FLAGS, .unit = "eval" },

     { "dither", "set dithering", OFFSET(do_dither), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, FLAGS },

+    { "aspect", "set aspect ratio", OFFSET(aspect), AV_OPT_TYPE_RATIONAL, {.dbl = 1}, 0, DBL_MAX, .flags = FLAGS },

     { NULL }

 };

@@ -281,10 +286,10 @@ static int config_props(AVFilterLink *inlink)

     if (!sar.num || !sar.den)

         sar.num = sar.den = 1;

     if (sar.num > sar.den) {

-        s->xscale = av_q2d(sar);

+        s->xscale = av_q2d(av_div_q(sar, s->aspect));

         s->yscale = 1;

     } else {

-        s->yscale = av_q2d(av_inv_q(sar));

+        s->yscale = av_q2d(av_div_q(s->aspect, sar));

         s->xscale = 1;

     }

     s->dmax = hypot(inlink->w / 2., inlink->h / 2.);