Capture only 1 field on BT656 interlaced input

[richogrady]

Is it possible to have the mxc overlay feature only capture the 1st field of an interlaced BT656 input?  We can do this on an interlaced MIPI input by setting the input window (CSIx ACT FRAME SIZE REGISTER) height to the height of 1 field.  We tried similarly for BT656 but it just doesnt seem to work.  We use the iMX6 solo and dual processors.

[joanxie]

 We can do this on an interlaced MIPI input by setting the input window

> what mipi input format do you use if not bt656?

maybe you can capture by your own software, since they stored in the memory field by field.

[richogrady]

To clarify: the MIPI input is BT656 in contrast to the parallel BT656 input.  The goal is to capture as non-interlaced so the fields sit in memory one after another (i.e. are not deinterlaced), and then crop to the one field.  Form here the image can be scaled on output.  Works just fine on the MIPI BT656 input, why can't it work on the parallel BT656 input?