diff --git a/doc/filters.texi b/doc/filters.texi
index c3623dee89..c5cba2aa2d 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -21585,6 +21585,23 @@ sharpen it, a value of zero will disable the effect.
 
 Default value is 0.0.
 
+@item alpha_msize_x, ax
+Set the alpha matrix horizontal size. It must be an odd integer
+between 3 and 23. The default value is 5.
+
+@item alpha_msize_y, ay
+Set the alpha matrix vertical size. It must be an odd integer
+between 3 and 23. The default value is 5.
+
+@item alpha_amount, aa
+Set the alpha effect strength. It must be a floating point number, reasonable
+values lay between -1.5 and 1.5.
+
+Negative values will blur the input video, while positive values will
+sharpen it, a value of zero will disable the effect.
+
+Default value is 0.0.
+
 @end table
 
 All parameters are optional and default to the equivalent of the
diff --git a/libavfilter/unsharp.h b/libavfilter/unsharp.h
index 253e32dd19..0da6f05036 100644
--- a/libavfilter/unsharp.h
+++ b/libavfilter/unsharp.h
@@ -44,14 +44,17 @@ typedef struct UnsharpFilterParam {
 typedef struct UnsharpContext {
     const AVClass *class;
     int lmsize_x, lmsize_y, cmsize_x, cmsize_y;
+    int amsize_x, amsize_y;
     float lamount, camount;
+    float aamount;
     UnsharpFilterParam luma;   ///< luma parameters (width, height, amount)
     UnsharpFilterParam chroma; ///< chroma parameters (width, height, amount)
+    UnsharpFilterParam alpha;  ///< alpha parameters (width, height, amount)
     int hsub, vsub;
+    int nb_planes;
     int bitdepth;
     int bps;
     int nb_threads;
-    int opencl;
     int (* apply_unsharp)(AVFilterContext *ctx, AVFrame *in, AVFrame *out);
     int (* unsharp_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
 } UnsharpContext;
diff --git a/libavfilter/vf_unsharp.c b/libavfilter/vf_unsharp.c
index 9a31045116..e88e732c9e 100644
--- a/libavfilter/vf_unsharp.c
+++ b/libavfilter/vf_unsharp.c
@@ -146,17 +146,18 @@ static int apply_unsharp_c(AVFilterContext *ctx, AVFrame *in, AVFrame *out)
 {
     AVFilterLink *inlink = ctx->inputs[0];
     UnsharpContext *s = ctx->priv;
-    int i, plane_w[3], plane_h[3];
-    UnsharpFilterParam *fp[3];
+    int i, plane_w[4], plane_h[4];
+    UnsharpFilterParam *fp[4];
     ThreadData td;
 
-    plane_w[0] = inlink->w;
+    plane_w[0] = plane_w[3] = inlink->w;
     plane_w[1] = plane_w[2] = AV_CEIL_RSHIFT(inlink->w, s->hsub);
-    plane_h[0] = inlink->h;
+    plane_h[0] = plane_h[3] = inlink->h;
     plane_h[1] = plane_h[2] = AV_CEIL_RSHIFT(inlink->h, s->vsub);
     fp[0] = &s->luma;
     fp[1] = fp[2] = &s->chroma;
-    for (i = 0; i < 3; i++) {
+    fp[3] = &s->alpha;
+    for (i = 0; i < s->nb_planes; i++) {
         td.fp = fp[i];
         td.dst = out->data[i];
         td.src = in->data[i];
@@ -188,9 +189,10 @@ static av_cold int init(AVFilterContext *ctx)
 
     set_filter_param(&s->luma,   s->lmsize_x, s->lmsize_y, s->lamount);
     set_filter_param(&s->chroma, s->cmsize_x, s->cmsize_y, s->camount);
+    set_filter_param(&s->alpha,  s->amsize_x, s->amsize_y, s->aamount);
 
-    if (s->luma.scalebits >= 26 || s->chroma.scalebits >= 26) {
-        av_log(ctx, AV_LOG_ERROR, "luma or chroma matrix size too big\n");
+    if (s->luma.scalebits >= 26 || s->chroma.scalebits >= 26 || s->alpha.scalebits >= 26) {
+        av_log(ctx, AV_LOG_ERROR, "luma or chroma or alpha matrix size too big\n");
         return AVERROR(EINVAL);
     }
     s->apply_unsharp = apply_unsharp_c;
@@ -198,6 +200,10 @@ static av_cold int init(AVFilterContext *ctx)
 }
 
 static const enum AVPixelFormat pix_fmts[] = {
+    AV_PIX_FMT_YUVA420P,  AV_PIX_FMT_YUVA422P,   AV_PIX_FMT_YUVA444P,
+    AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUVA444P16,
+    AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA422P16,
+    AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA420P16,
     AV_PIX_FMT_YUV420P,  AV_PIX_FMT_YUV422P,  AV_PIX_FMT_YUV444P,  AV_PIX_FMT_YUV410P,
     AV_PIX_FMT_YUV411P,  AV_PIX_FMT_YUV440P,  AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
     AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
@@ -242,6 +248,7 @@ static int config_input(AVFilterLink *inlink)
     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
     int ret;
 
+    s->nb_planes = desc->nb_components;
     s->hsub = desc->log2_chroma_w;
     s->vsub = desc->log2_chroma_h;
     s->bitdepth = desc->comp[0].depth;
@@ -325,7 +332,12 @@ static const AVOption unsharp_options[] = {
     { "cy",             "set chroma matrix vertical size",   OFFSET(cmsize_y), AV_OPT_TYPE_INT,   { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
     { "chroma_amount",  "set chroma effect strength",        OFFSET(camount),  AV_OPT_TYPE_FLOAT, { .dbl = 0 },       -2,        5, FLAGS },
     { "ca",             "set chroma effect strength",        OFFSET(camount),  AV_OPT_TYPE_FLOAT, { .dbl = 0 },       -2,        5, FLAGS },
-    { "opencl",         "ignored",                           OFFSET(opencl),   AV_OPT_TYPE_BOOL,  { .i64 = 0 },        0,        1, FLAGS },
+    { "alpha_msize_x",  "set alpha matrix horizontal size",  OFFSET(amsize_x), AV_OPT_TYPE_INT,   { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
+    { "ax",             "set alpha matrix horizontal size",  OFFSET(amsize_x), AV_OPT_TYPE_INT,   { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
+    { "alpha_msize_y",  "set alpha matrix vertical size",    OFFSET(amsize_y), AV_OPT_TYPE_INT,   { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
+    { "ay",             "set alpha matrix vertical size",    OFFSET(amsize_y), AV_OPT_TYPE_INT,   { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
+    { "alpha_amount",   "set alpha effect strength",         OFFSET(aamount),  AV_OPT_TYPE_FLOAT, { .dbl = 0 },       -2,        5, FLAGS },
+    { "aa",             "set alpha effect strength",         OFFSET(aamount),  AV_OPT_TYPE_FLOAT, { .dbl = 0 },       -2,        5, FLAGS },
     { NULL }
 };