I'm running Wireshark 3.0.0 for Windows 64bit
If I start Wireshark from the command line with the following parameters: -b duration:3600 -b filesize:2000 -b files:30 -w c:\windows\temp\filename.pcapng
Then Wireshark does start but the ring buffer setting page in Wireshark will show the correct settings for Filesize and Files, but the duration field will be disabled.
Is there something I should be doing differently?