[FFmpeg-user] how to see what version of ffv1

[jshupert at theppsgroup.com]

Friends,
3 Qs
q1
I am wondering how I can tell what version of ffv1 a file is encoded with?

I find a ticket 1534
https://trac.ffmpeg.org/ticket/1534
that seems to have the same concern
 ffprobe -show_streams  does *not show that a file was made with

q2
is it true that the following command will create a file with ffv1 version 3?
ffmpeg -i <input> -vcodec ffv1 -level 3 -coder 1 <outfile>

q3
how can i see that my ffmpeg compile has ffv1 version 3 capability

thanks much

jS