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Question asked by caiyu zheng on Aug 8, 2016
Latest reply on Aug 8, 2016 by igorpadykov

I am programming in linux userspace that capture camera data from CSI 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?