On Wednesday 15 Apr 2009, Hans de Goede wrote: > Currently only whitebalancing is enabled and only on Pixarts (pac) webcams > (which benefit tremendously from this). To test this with other webcams > (after instaling this release) do: > > export LIBV4LCONTROL_CONTROLS=15 > LD_PRELOAD=/usr/lib/libv4l/v4l2convert.so v4l2ucp& >
Strangely while those instructions give me a whitebalance control for the sq905 based camera I can't get it to appear for a pac207 based camera regardless of whether LIBV4LCONTROL_CONTROLS is set. > Notice the whitebalance and normalize checkboxes in v4l2ucp, > as well as low and high limits for normalize. > > Now start your favorite webcam viewing app and play around with the > 2 checkboxes. Note normalize seems to be useless in most cases. If > whitebalancing makes a *strongly noticable* difference for your webcam > please mail me info about your cam (the usb id), then I can add it to > the list of cams which will have the whitebalancing algorithm (and the v4l2 > control to enable/disable it) enabled by default. The whitebalance works really well with the sq905 (ID 2770:9120). Without it the image is very red when using artificial light, with auto whitebalance the colours look slightly desaturated but otherwise fine. Adam -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
