diff --git a/src/main.cpp b/src/main.cpp
index c0fe84a..f588fce 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -118,6 +118,7 @@ static void print_usage()
     fprintf(stdout, "  -z                   enable temporal tta mode\n");
     fprintf(stdout, "  -u                   enable UHD mode\n");
     fprintf(stderr, "  -f pattern-format    output image filename pattern format (%%08d.jpg/png/webp, default=ext/%%08d.png)\n");
+    fprintf(stderr, "  -q                   webp image quality (0-100)\n");
     fprintf(stderr, "  -l                   list out available gpu devices\n");
 }
 
@@ -190,7 +191,7 @@ static int decode_image(const path_t& imagepath, ncnn::Mat& image, int* webp)
     return 0;
 }
 
-static int encode_image(const path_t& imagepath, const ncnn::Mat& image)
+static int encode_image(const path_t& imagepath, const ncnn::Mat& image, float quality = 100.0)
 {
     int success = 0;
 
@@ -198,7 +199,7 @@ static int encode_image(const path_t& imagepath, const ncnn::Mat& image)
 
     if (ext == PATHSTR("webp") || ext == PATHSTR("WEBP"))
     {
-        success = webp_save(imagepath.c_str(), image.w, image.h, image.elempack, (const unsigned char*)image.data);
+        success = webp_save(imagepath.c_str(), image.w, image.h, image.elempack, (const unsigned char*)image.data, quality);
     }
     else if (ext == PATHSTR("png") || ext == PATHSTR("PNG"))
     {
@@ -370,12 +371,14 @@ class SaveThreadParams
 {
 public:
     int verbose;
+    float quality;
 };
 
 void* save(void* args)
 {
     const SaveThreadParams* stp = (const SaveThreadParams*)args;
     const int verbose = stp->verbose;
+    const float quality = stp->quality;
 
     for (;;)
     {
@@ -386,7 +389,7 @@ void* save(void* args)
         if (v.id == -233)
             break;
 
-        int ret = encode_image(v.outpath, v.outimage);
+        int ret = encode_image(v.outpath, v.outimage, quality);
 
         // free input pixel data
         {
@@ -427,7 +430,7 @@ void* save(void* args)
 #if _WIN32
                 fwprintf(stderr, L"%ls %ls %f -> %ls done\n", v.in0path.c_str(), v.in1path.c_str(), v.timestep, v.outpath.c_str());
 #else
-                fprintf(stderr, "%s %s %f -> %s done\n", v.in0path.c_str(), v.in1path.c_str(), v.timestep, v.outpath.c_str());
+                fprintf(stderr, "%s %s %f -> %s done (q - %f%)\n", v.in0path.c_str(), v.in1path.c_str(), v.timestep, v.outpath.c_str(), quality);
 #endif
             }
         }
@@ -455,6 +458,7 @@ int main(int argc, char** argv)
     std::vector<int> jobs_proc;
     int jobs_save = 2;
     int verbose = 0;
+    float quality = 100.0;
     int tta_mode = 0;
     int tta_temporal_mode = 0;
     int uhd_mode = 0;
@@ -463,7 +467,7 @@ int main(int argc, char** argv)
 #if _WIN32
     setlocale(LC_ALL, "");
     wchar_t opt;
-    while ((opt = getopt(argc, argv, L"0:1:i:o:n:s:m:g:j:f:vxzulh")) != (wchar_t)-1)
+    while ((opt = getopt(argc, argv, L"0:1:i:o:n:s:m:g:j:f:q:vxzulh")) != (wchar_t)-1)
     {
         switch (opt)
         {
@@ -498,6 +502,9 @@ int main(int argc, char** argv)
         case L'f':
             pattern_format = optarg;
             break;
+        case L'q':
+            quality = atof(optarg);
+            break;
         case L'v':
             verbose = 1;
             break;
@@ -526,7 +533,7 @@ int main(int argc, char** argv)
     }
 #else // _WIN32
     int opt;
-    while ((opt = getopt(argc, argv, "0:1:i:o:n:s:m:g:j:f:vxzulh")) != -1)
+    while ((opt = getopt(argc, argv, "0:1:i:o:n:s:m:g:j:f:q:vxzulh")) != -1)
     {
         switch (opt)
         {
@@ -561,6 +568,9 @@ int main(int argc, char** argv)
         case 'f':
             pattern_format = optarg;
             break;
+        case 'q':
+            quality = atof(optarg);
+            break;
         case 'v':
             verbose = 1;
             break;
@@ -912,6 +922,7 @@ int main(int argc, char** argv)
             // save image
             SaveThreadParams stp;
             stp.verbose = verbose;
+            stp.quality = quality;
 
             std::vector<ncnn::Thread*> save_threads(jobs_save);
             for (int i=0; i<jobs_save; i++)
diff --git a/src/webp_image.h b/src/webp_image.h
index 263f3c2..42ccfce 100644
--- a/src/webp_image.h
+++ b/src/webp_image.h
@@ -48,9 +48,9 @@ unsigned char* webp_load(const unsigned char* buffer, int len, int* w, int* h, i
 }
 
 #if _WIN32
-int webp_save(const wchar_t* filepath, int w, int h, int c, const unsigned char* pixeldata)
+int webp_save(const wchar_t* filepath, int w, int h, int c, const unsigned char* pixeldata, float quality = 100.0)
 #else
-int webp_save(const char* filepath, int w, int h, int c, const unsigned char* pixeldata)
+int webp_save(const char* filepath, int w, int h, int c, const unsigned char* pixeldata, float quality = 100.0)
 #endif
 {
     int ret = 0;
@@ -60,25 +60,51 @@ int webp_save(const char* filepath, int w, int h, int c, const unsigned char* pi
 
     FILE* fp = 0;
 
-    if (c == 3)
+    if (quality >= 100.0)
     {
+        // LOSSLESS
+        if (c == 3)
+        {
 #if _WIN32
-        length = WebPEncodeLosslessBGR(pixeldata, w, h, w * 3, &output);
+            length = WebPEncodeLosslessBGR(pixeldata, w, h, w * 3, &output);
 #else
-        length = WebPEncodeLosslessRGB(pixeldata, w, h, w * 3, &output);
+            length = WebPEncodeLosslessRGB(pixeldata, w, h, w * 3, &output);
 #endif
-    }
-    else if (c == 4)
-    {
+        }
+        else if (c == 4)
+        {
 #if _WIN32
-        length = WebPEncodeLosslessBGRA(pixeldata, w, h, w * 4, &output);
+            length = WebPEncodeLosslessBGRA(pixeldata, w, h, w * 4, &output);
 #else
-        length = WebPEncodeLosslessRGBA(pixeldata, w, h, w * 4, &output);
+            length = WebPEncodeLosslessRGBA(pixeldata, w, h, w * 4, &output);
 #endif
-    }
-    else
-    {
-        // unsupported channel type
+        }
+        else
+        {
+            // unsupported channel type
+        }
+    } else {
+        /// IF QUALITY IS SET
+        if (c == 3)
+        {
+#if _WIN32
+            length = WebPEncodeBGR(pixeldata, w, h, w * 3, quality, &output);
+#else
+            length = WebPEncodeRGB(pixeldata, w, h, w * 3, quality, &output);
+#endif
+        }
+        else if (c == 4)
+        {
+#if _WIN32
+            length = WebPEncodeBGRA(pixeldata, w, h, w * 4, quality, &output);
+#else
+            length = WebPEncodeRGBA(pixeldata, w, h, w * 4, quality, &output);
+#endif
+        }
+        else
+        {
+            // unsupported channel type
+        }
     }
 
     if (length == 0)