I was discussing this with Tim earlier, and there was a little
confusion. He meant V4L2_FIELD_SEQ_TB/BT, not V4L2_FIELD_INTERLACED.
When I tried out 1080i50 with HDMI in and the i.MX6, I got something
that looks like V4L2_FIELD_SEQ_TB. The question though is: are the field
rows always arranged like this with interlaced HDMI? Or does this depend
on the source? Could it for example be possible that 2 HDMI cameras
deliver both interlaced video, but the first one delivers
V4L2_FIELD_INTERLACED, and the second delivers V4L2_FIELD_SEQ_TB? Could
this happen?
On 2017-11-07 19:40, Tim Harvey wrote:
Greetings,
I'm trying to understand the various field orders supported by v4l2
[1]. Do HDMI sources always use V4L2_FIELD_INTERLACED or can they
support alternate modes as well?
Regards,
Tim
[1] - https://www.linuxtv.org/downloads/legacy/video4linux/API/V4L2_API/spec/ch03s06.html
