The "Video Format Mismatch" error is triggered by two causes described in the technical reference, either: The detected video format does not match the configured video format. - OR - The detected video format does not match the specified format from the SMPTE 352M packet. Possible causes of this error might include a video signal that is so badly damaged that the WVR cannot properly auto-detect the format or the video signal has incorrectly formed SMPTE 352M packet headers.