Hi Steven,
I've mainly tested with qv4l2 utility, but also tested streaming video with vlc. You need to select a video mode first though. In qv4l2 you can do this by selecting the mode from the drop-down box. If there is an active video signal the mode needs to match the signal. In qv4l2 You can set the mode to the active mode by clicking the "Query Timings" button. In free running mode, when no active video signal is present you can freely choose the mode. Another method of setting the mode to the detected mode is to run `v4l2-ctl --set-dv-bt-timings query`.
During testing I've used the latest version of the v4l2-utils. This version is pre-installed in the latest pre-build image. But if you are using an older image with the version that comes with Ubuntu by default you might need to upgrade v4l2-utils.
- Lars