Based on your request, I have put together a write-up based on the file and its likely context, based on opentrack-2.3.0-test-20160922-test-dialog-3.7z and related directshow troubleshooting. Write-up: Cam 3.7z File: Cam 3.7z (Compressed Archive)
The 3.7z file is a portable build of opentrack, likely aimed at solving DirectShow-related crashes when using specific cameras. Cam 3.7z
Extract the contents of the .7z file to a known folder. Run: Open the extracted folder and run opentrack.exe . Based on your request, I have put together