Answer:

This typically depends on your DVR model and the resolution setting you selected for recording. Some DVRs offer "-N" resolution options (such as 4M‑N or 5M‑N), which use only half the horizontal pixel count of standard 4MP or 5MP resolutions. When you back up footage recorded at these resolutions and play it back on a PC using a media player like VLC, the aspect ratio may appear incorrect. To fix this, simply adjust the aspect ratio setting within VLC: right‑click on the video> Video > Aspect Ratio > select 16:9.