lavfi/vf_vpp_qsv: set the right timestamp for AVERROR_EOF

Rescale the timestamp for AVERROR_EOF. This can fix tickets 10261 and
10262.

Tested-by: Dmitry Rogozhkin <dmitry.v.rogozhkin@intel.com>
Signed-off-by: Haihao Xiang <haihao.xiang@intel.com>

libavfilter/vf_vpp_qsv.c

@@ -602,6 +602,7 @@ not_ready:
     return FFERROR_NOT_READY;
 
 eof:
+    pts = av_rescale_q(pts, inlink->time_base, outlink->time_base);
     ff_outlink_set_status(outlink, status, pts);
     return 0;
 }