I am programming in linux userspace that capture camera data from CSI interface.my camera sensor is tw9900.and the input signal is NTSC
I meet some program.
1.v4l2 capture API can only work for Block mode. and captue data is rolling.
2. v4l2 overlap mode is useless.
when I use mxc_v4l2_tvin -ow 640 -oh 480
It returns ERROR: v4l2 capture: mxc_v4l_dqueue timeout enc_counter 0
So I write a simple program captured a picture for once.
and the picture turns out
I also notices the overlap mode is just put the v4l2 capture chanel output adress into v4l2 output chanel input adress.
I notice tw9900 output format is BT656 which is no-gate mode. does imx6q CSI support this format? if not . how can I fix this?