gst-plugin-aml-v4l2dec: get PAR from decoder and set it to caps. [1/2]

PD#SWPL-149833

Problem:
Caps have un-correct pixel_aspect_ratio

Solution:
get PAR from decoder and set it to caps

Verify:
AH212

Change-Id: I51fcf209dfbf458e5437360aed3fbceb5fbc792a
Signed-off-by: sheng.liu <sheng.liu@amlogic.com>
3 files changed