Avidemux vs PTGui

Avidemux has no write-up on Specifiction yet; its figures are above.

PTGui stitches photographs into panoramic images, including spherical panoramas that cover 360° × 180°. It can detect overlap between photos and join multiple rows, including images made with fisheye lenses. Manual stitching, a live preview, and a perspective editor provide additional control. On supported hardware, OpenCL can accelerate stitching with the GPU. PTGui accepts JPEG, TIFF, PNG, and camera RAW source images; listed output formats include JPEG, TIFF, Photoshop, and DNG. The Pro edition adds HDR stitching, masking, viewpoint correction, exposure fusion, and a patch tool. PTGui runs on Linux, macOS 10.15 or later, and Windows 10 build 18362 or later. It processes photos, projects, and templates on the user's computer and primarily works offline; HTTPS is used for optional update checks, license activation, and opt-in crash reports. The fully functional trial has no time limit, but exported panoramas carry a visible watermark. Personal licenses include one year of upgrades. Technical support is through a public forum, not email or telephone.