setting qcvault in qcli prevents use of -o with qcli

`ffmpeg -y -v 0 -f lavfi -i testsrc -t 1 test.mov | qcli -i -f signalstats+aphasemeter+astats+ssim -i - -o test.mkv`

```
qcli 1.2, Dec 17 2020 17:06:51
-qcvault and -o can not be used at same time, analyzing stopped.
```