GStreamer SDK error

[GHNGHN]

We have taken clone of a project and made all settings as per instruction still not able to build app due to following error:
Error:(7, 10) fatal error: 'gst/gst.h' file not found

above error is in tutorial.c file:
`#include <gst/gst.h>
#include <gst/video/video.h>
#include <gst/video/videooverlay.h>
#include <pthread.h>

GST_DEBUG_CATEGORY_STATIC (debug_category);
#define GST_CAT_DEFAULT debug_category
`

Please find below gradle and Android.mk file which I have added to my project:
Gradle

android {
compileSdkVersion 25
buildToolsVersion "25.0.0"
defaultConfig {
applicationId "com.example.ndktest"
minSdkVersion 19
targetSdkVersion 22
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
externalNativeBuild {
cmake {
cppFlags "-frtti -fexceptions"
arguments '-DANDROID_TOOLCHAIN=clang',
'-DANDROID_PLATFORM=android-19',
'-DANDROID_STL=gnustl_static',
'-DANDROID_ARM_NEON=TRUE',
'-DANDROID_CPP_FEATURES=exceptions rtti'

        }
    }
    ndk {
        moduleName "tutorial-5"
    }
}

sourceSets.main {
    jni.srcDirs = []
    jniLibs.srcDir new File(buildDir, 'lib')

}

buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}
externalNativeBuild {
    cmake {
        path "CMakeLists.txt"
    }
}

}

Android.mk

`LOCAL_PATH := $(call my-dir)

GSTREAMER_ROOT_ANDROID := D:\ndk-gst1.9.1

SHELL := PATH=/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin /bin/bash

include $(CLEAR_VARS)

LOCAL_MODULE := tutorial-5
LOCAL_SRC_FILES := tutorial-5.c
LOCAL_SHARED_LIBRARIES := gstreamer_android
LOCAL_LDLIBS := -llog -landroid
include $(BUILD_SHARED_LIBRARY)

ifndef GSTREAMER_ROOT
ifndef GSTREAMER_ROOT_ANDROID
$(error GSTREAMER_ROOT_ANDROID is not defined!)
endif
GSTREAMER_ROOT := $(GSTREAMER_ROOT_ANDROID)
endif
GSTREAMER_NDK_BUILD_PATH := $(GSTREAMER_ROOT)/share/gst-android/ndk-build

include $(GSTREAMER_NDK_BUILD_PATH)/plugins.mk
GSTREAMER_PLUGINS := $(GSTREAMER_PLUGINS_CORE) $(GSTREAMER_PLUGINS_PLAYBACK) $(GSTREAMER_PLUGINS_CODECS) $(GSTREAMER_PLUGINS_NET) $(GSTREAMER_PLUGINS_SYS) $(GSTREAMER_PLUGINS_CODECS_RESTRICTED)
G_IO_MODULES := gnutls
GSTREAMER_EXTRA_DEPS := gstreamer-video-1.0

include $(GSTREAMER_NDK_BUILD_PATH)/gstreamer-1.0.mk
`

Please suggest what changes need to be done in above code to make it run.

@jaroslavas