On Fri, Feb 15, 2019 at 8:24 AM Nicolas Dufresne <nicolas@xxxxxxxxxxxx> wrote: > > Le vendredi 15 février 2019 à 12:10 +0100, Philipp Zabel a écrit : > > > I'm also not sure how to specify hflip/vflip... I don't think > > > extra-controls parses 'hflip', 'vflip' as ipu_csc_scaler_s_ctrl gets > > > called with V4L2_CID_HFLIP/V4L2_CID_VFLIP but ctrl->val is always 0. > > > > You can use v4l2-ctl -L to list the CID names, they are horizontal_flip > > and vertical_flip, respectively. Again, the input and output formats > > must be different because GStreamer doesn't know about the flipping yet: > > > > gst-launch-1.0 videotestsrc ! video/x-raw,width=320,height=240 ! v4l2video10convert extra-controls=cid,horizontal_flip=1 ! video/x-raw,width=640,height=480 ! kmssink can-scale=false > > > > We'd have to add actual properties for rotate/flip to v4l2convert, > > instead of using theextra-controls workaround, probable something > > similar to the video-direction property of the software videoflip > > element. > > Note that we have a disable-passthrough property in master, a trivial > patch to backport if you need it. > > https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/commit/fe5236be8771ea82c850ebebe19cf1064d112bf0 Nicolas, Yes, this works great on gstreamer-master: gst-launch-1.0 videotestsrc ! v4l2convert extra-controls=cid,vertical_flip=1 ! kmssink ^^^ fails to flip b/c gstreamer bypases the conversion as input and output formats are the same gst-launch-1.0 videotestsrc ! v4l2convert extra-controls=cid,vertical_flip=1 disable-passthrough=1 ! kmssink ^^^ flips as expected Tim
