We currently use a DVR that converts to WMV on download. The files are originally stored as MP4, but it uses a proprietary codec. So far, I have only found one program that converts the MP4 to WMV, provided by HIKVISION.
The issue is that these files, after conversion, have audio that grows more out of sync over time. Towards the end of the video, the audio can be several seconds behind the video.
What program(s) would you recommend to get this back in sync?