diff --git a/src/upscaler.py b/src/upscaler.py
index d211b1d..594d79c 100755
--- a/src/upscaler.py
+++ b/src/upscaler.py
@@ -4,7 +4,7 @@
 Name: Video2X Upscaler
 Author: K4YT3X
 Date Created: December 10, 2018
-Last Modified: May 8, 2020
+Last Modified: May 9, 2020
 
 Description: This file contains the Upscaler class. Each
 instance of the Upscaler class is an upscaler on an image or
@@ -257,7 +257,7 @@ class Upscaler:
             process_directory.mkdir(parents=True, exist_ok=True)
 
         # waifu2x-converter-cpp will perform multi-threading within its own process
-        if self.driver == 'waifu2x_converter_cpp':
+        if self.driver in ['waifu2x_converter_cpp', 'waifu2x_ncnn_vulkan', 'srmd_ncnn_vulkan']:
             process_directories = [self.extracted_frames]
 
         else:
@@ -297,13 +297,15 @@ class Upscaler:
             elif self.driver == 'waifu2x_ncnn_vulkan':
                 self.process_pool.append(driver.upscale(process_directory,
                                                         self.upscaled_frames,
-                                                        self.scale_ratio))
+                                                        self.scale_ratio,
+                                                        self.processes))
 
             # if the driver being used is srmd_ncnn_vulkan
             elif self.driver == 'srmd_ncnn_vulkan':
                 self.process_pool.append(driver.upscale(process_directory,
                                                         self.upscaled_frames,
-                                                        self.scale_ratio))
+                                                        self.scale_ratio,
+                                                        self.processes))
 
         # start progress bar in a different thread
         Avalon.debug_info(_('Starting progress monitor'))
@@ -489,7 +491,7 @@ class Upscaler:
                     self._wait()
 
                     # get average frame rate of video stream
-                    framerate = float(Fraction(video_info['streams'][video_stream_index]['avg_frame_rate']))
+                    framerate = float(Fraction(video_info['streams'][video_stream_index]['r_frame_rate']))
                     fm.pixel_format = video_info['streams'][video_stream_index]['pix_fmt']
 
                     # get a dict of all pixel formats and corresponding bit depth
diff --git a/src/wrappers/srmd_ncnn_vulkan.py b/src/wrappers/srmd_ncnn_vulkan.py
index 2be517d..9f64a47 100644
--- a/src/wrappers/srmd_ncnn_vulkan.py
+++ b/src/wrappers/srmd_ncnn_vulkan.py
@@ -4,7 +4,7 @@
 Name: SRMD NCNN Vulkan Driver
 Creator: K4YT3X
 Date Created: April 26, 2020
-Last Modified: May 7, 2020
+Last Modified: May 9, 2020
 
 Description: This class is a high-level wrapper
 for srmd_ncnn_vulkan.
@@ -53,7 +53,7 @@ class WrapperMain:
         parser.add_argument('-x', action='store_true', help='enable tta mode')
         return parser.parse_args(arguments)
 
-    def upscale(self, input_directory, output_directory, scale_ratio):
+    def upscale(self, input_directory, output_directory, scale_ratio, threads):
         """This is the core function for SRMD ncnn Vulkan class
 
         Arguments:
@@ -66,6 +66,7 @@ class WrapperMain:
         self.driver_settings['i'] = input_directory
         self.driver_settings['o'] = output_directory
         self.driver_settings['s'] = scale_ratio
+        self.driver_settings['j'] = '{}:{}:{}'.format(threads, threads, threads)
 
         # by default, srmd-ncnn-vulkan will look for the models under the current working directory
         # change the working directory to its containing folder if model directory not specified
diff --git a/src/wrappers/waifu2x_ncnn_vulkan.py b/src/wrappers/waifu2x_ncnn_vulkan.py
index a62bf21..36e0fe2 100644
--- a/src/wrappers/waifu2x_ncnn_vulkan.py
+++ b/src/wrappers/waifu2x_ncnn_vulkan.py
@@ -4,7 +4,7 @@
 Name: Waifu2x NCNN Vulkan Driver
 Creator: SAT3LL
 Date Created: June 26, 2019
-Last Modified: May 7, 2020
+Last Modified: May 9, 2020
 
 Editor: K4YT3X
 Last Modified: February 22, 2020
@@ -56,7 +56,7 @@ class WrapperMain:
         parser.add_argument('-x', action='store_true', help='enable tta mode')
         return parser.parse_args(arguments)
 
-    def upscale(self, input_directory, output_directory, scale_ratio):
+    def upscale(self, input_directory, output_directory, scale_ratio, threads):
         """This is the core function for WAIFU2X class
 
         Arguments:
@@ -69,6 +69,7 @@ class WrapperMain:
         self.driver_settings['i'] = input_directory
         self.driver_settings['o'] = output_directory
         self.driver_settings['s'] = int(scale_ratio)
+        self.driver_settings['j'] = '{}:{}:{}'.format(threads, threads, threads)
 
         # by default, waifu2x-ncnn-vulkan will look for the models under the current working directory
         # change the working directory to its containing folder if model directory not specified