[Bug 790265] v4l2src: Give preference to contiguous memory format over non contiguous one while setting format to /dev/video

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=790265

--- Comment #9 from Devarsh Thakkar <devarsht at xilinx.com> ---
Thanks for the update and sorry for the long delay, please see response inline
with tag {Devarsh}:

"I'll close this issue then as that sound it may happen in a year, or in 10
years from now. Please re-open (or create a new one) whenever you would like to
do any upstream work on this."
{Devarsh} Sure,  am looking into this and will share observations within a
month or two on what can be done to handle this. Yes I am a beginner and pretty
new to this and working on some other things as well but still it should not
take 1 (or 10 years). Anyways thanks for the motivation.

Finally, you didn't share any failure traces or any step to reproduce. Could
this be reproduced with some test driver, like vivid, vim2m or vimc ? There is
currently no way to validate. Even with access to your HW I would not know how
to test this.
{Devarsh} AFAIK video test devices like vivid support only the multiplanar
format and may require to update them to support both i.e. NV12 and NV12M. I am
able to reproduce with my hardware so do you want me to send a build and steps
to reproduce?

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