Assalam-u-Alaikum!

Dear experts, umeed hai ap sub Allah Paak ke fazal-o-karam se theek hongay. Mujhe ap se aik help chahiye wo ye ke mere teacher ne mujhe aik video record ker ke di hai Snow Fox Screen Recorder ke through jo ke aik PHP lecture hai jo maine miss ker diya tha aur maine request ker ke video record kerwayi aur ye lecture mere liye bohat important hai but voice bohat problem ker rahi hai
Video Ext: .wmv
Video Length: 01:26:23
Video Size: 1.17 GB

Masla ye hai ke video mein voice theek nahi hai, means ke voice aur video activity mein difference hai. Awaz baad mein hai aur video activity pehlay. Kya koi bata sakta hai ke isay kaisay theek kiya ja sakta hai ta ke video activity aur voice aik hi waqt mein play hon na ke video pehlay aur audio baad mein ???

Looking forward to hear from experts...