Encoding from WMV leads to crackling/duplicated audio

[mixitup]

I’m new to the program and enjoying it immensely but I’m having an issue when I try to encode WMV source material. I have some old files that were encoded with WMA2 Audio and WMV3 Video codecs. Upon editing and exporting this media, I am noticing that I am getting crackling audio and duplicated sounds from time to time. I’m running the program on Windows 10. I’m outputting with the libx264 video codec and aac audio.

Is there any way to fix this?

[shotcut]

This is a known problem (can be found here by searching). You need to convert the file. Not all files can be used directly. You can do that using Properties > Convert to Edit-friendly.