Code:
LoadCPlugin("C:\Program Files\AviSynth 2.5\plugins\ffms-2.17-cplugin\ffms2.dll")
LoadPlugin("C:\Program Files\MeGUI\tools\avisynth_plugin\VSFilter.dll")
vid=FFVideoSource("C:\Users\HauntingShock\Documents\video1.mp4")
aud=FFAudioSource("C:\Users\HauntingShock\Documents\video1.mp4")
Audiodub(vid,aud)
textsub("C:\Users\HauntingShock\Bandicam\Testing.ass")
Copy and past this over what you have and see if that works.