File formats, resolutions and file systems

DVRs can usually record and play H.264, MPEG-4 Part 2, MPEG-2 .mpg, MPEG-2 .TS, VOB and ISO images video, with MP3 and AC3 audio tracks. They can also display images (JPEG and PNG) and play music files (MP3 and Ogg).
Some devices can be updated to play and record in new formats.
Recordings from standard-definition television usually have 480p/i/576p/i while HDTV is usually in 720p/1080i.
DVRs usually record in proprietary filesystems for copy protection, although some can use FAT filesystems.

 

The images show the DVR viewer software that comes with the 8 channel DVR.  This software allows you to view your security cameras remotely over the Internet using a Internet Explorer from your Windows XP and an Internet connection. DVR viewer software available in 4, 8, and 16 channel models.

Actual images are even clearer that what is seen on this webpage.  Surveillance images that are viewed on location are always much higher quality than taken remotely over the Internet because of bandwidth / connectivity limitations.
These images have been screen captured and converted/compressed to Internet format which lowers their quality.

DVR viewer software 4 from 8 channel models.
With the appearance of 4 images alternately