DVR is a video recording file format commonly used by digital video recorders. It stores video content captured by security cameras or other recording devices. DVR files are typically large but provide high-quality footage for surveillance and monitoring purposes. They can be played back using compatible software or media players.
WMA is a digital audio format developed by Microsoft, primarily used for music and audio streaming. It offers high compression while maintaining good sound quality. WMA files are supported by Windows-based devices and media players, but are less compatible with other operating systems compared to MP3.