MSU VQMT, the Video Quality Measurement Tool from the Moscow State University Graphics and Media Lab Video Group, is the reference dedicated quality tool: it computes the same metrics as FFmpeg but wraps them in a workbench. It runs around two dozen metrics in one pass - VMAF, PSNR, SSIM, MS-SSIM, VQM, NIQE and others, plus HDR variants for high-dynamic-range content that standard metrics misread - with GPU acceleration via OpenCL and CUDA, batch and region-of-interest measurement, CSV and JSON export, and three interfaces (GUI, command line, and Python package). Its signature value is letting you see where quality dropped: a per-frame plot exposes a dip the mean hides, you jump to that frame to compare source and encode, and a difference (residue) heatmap localizes the artifact in space. The metric math is identical to FFmpeg's; what you pay for is the investigation around it. A frequent catch is the name collision with the unrelated open-source rolinh/VQMT, which has no GUI and no VMAF.
