SDR2 filename extension is used for files that contain digital video data. SDR2 files are commonly associated with video players called Micro D. SDR2 files store video data encoded with H.264 standard. SDR2 files are typically generated by CCTV systems. SDR2 format offers high-quality images and a relatively small file size.

SDR2 format was developed by Seorim Digital Technology Co., Ltd., which manufactures video systems and applications for various branches of production industry, medicine, and security. SDR2 files store images captured with Seorim cameras.