itsIfSdiFormat 1.3.6.1.4.1.2928.6.2.16.1.1.7.1.1

Video source format. The format is presented as `<pixels-per-line>x<lines-per-frame><i/p> @ <freq> Hz' E.g. `1920x1080p @ 30 Hz' The string is empty if no format is detected.