If the automatic calibration doesn't work on your project or if you want to manually improve your calibration, you can use Hugin or PTGui software. Hugin is free, but PTGui free version is not compatible with our software.
Both PTGui and PTGui pro works. The comparative list of both version's features can be found here on PTGui's website.
The most significant difference is the support of masks in PTGui pro which are automatically recognized and imported by VideoStitch Studio (PTGui red masks only).
If you intend to produce photographic panoramas and virtual tours, we recommend you to try PTGui Pro which offers high-end and professional image quality and workflow.