v4l2videoenc: workaround for sink pool dequeue race condition

Sink pool dequeue and finish frame has race condition.
Unref input buffer in chain thread to avoid it.

https://bugzilla.gnome.org/show_bug.cgi?id=752962

UpStream Status: Pending

Signed-off-by: Song Bing<bing.song@nxp.com>
1 file changed