From: Antonio Ospite <ao2@ao2.it>
Date: Sat, 10 Oct 2020 19:57:45 +0000 (+0200)
Subject: opencv_trail_effect.cpp: hardcode V4L2 VideoCapture backend on linux
X-Git-Url: https://git.ao2.it/experiments/opencv_trail_effect.git/commitdiff_plain/6dfbf326ce5ad3b4cd83760763c0ed7807803998?hp=6dfbf326ce5ad3b4cd83760763c0ed7807803998

opencv_trail_effect.cpp: hardcode V4L2 VideoCapture backend on linux

Hardcode the V4L2 backend on linux for now because the GStreamer one
lacks some functionality, see:
https://github.com/opencv/opencv/issues/18562
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