How to configure video proxy, audio proxy & thumbnail settings for FFMBC?

How to configure video proxy, audio proxy & thumbnail settings for FFMBC?

Below arguments can be used to configure:
 
Video Settings
-i "eSourceFile" -y -s 640x360 -b 1024k -vcodec libx264 -r eSourceFrameRate -strict experimental -acodec aac "eDestPath\eUUID_1.mp4"
 
 Audio Settings
-i "eSourceFile" -y -ab 128k "eDestPath\eUUID_2.mp3"
 
 Thumbnail Settings
-i "eSourceFile" -y -r 1/5 -force_fps -f image2 -vf scale=176:-1 "eDestPath\eUUID_0.jpg"