8ca2076de1
.. where only 2 filtering modes are potentially tried, instead of all of them. This is fast than the exhaustive 'best' mode, and not much worse. Options for cwebp are: -alpha_filter none -alpha_filter fast (<- default) -alpha_filter best (<- slow) Change-Id: I8cb90ee11b8f981811e013ea4ad5bf72ba3ea7d4