v4l2src does not support progressive interlacing

[Tim Harvey]

On Sun, Oct 28, 2018 at 3:44 PM Nicolas Dufresne <nicolas at ndufresne.ca> wrote:
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>
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> Le dim. 28 oct. 2018 20 h 43, Antoine Villeret <antoine.villeret at gmail.com> a écrit :
>>
>> hi Nicolas,
>>
>> as far as i understand v4l2-compliance output (https://gist.github.com/avilleret/0eb894d58612d91aba7ab81f9d823dbf)
>> bttv driver does support TRY_FMT
>> but I might be wrong
>>
>> on the other side, I made further test with your path, and it seems to work.
>> 'it seems' because strangely a test pipeline abord with the output you've already look at.
>> But my program (based on OpenFrameworks) does work with your patch while it didn't with gstreamer 1.14 from Ubuntu 18.04 repo.
>> I don't know actually what trigs the error you see and why the test pipeline abord before displaying anything,
>> maybe I miss some extensions/plugins.
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>
> Ok, so it seems like the patch does something. I'll reread with the assumption TRY_FMT isn't supported, I might better understand. I always believed that without that, it would always fail.
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>> Thanks for your time, and I might make further test tomorrow if you need.
>>

Nicolas,

Did you receive the log I sent you regarding my experience with this
issue? I can send again if needed.

Regards,

Tim