Wrong estimation when running on webcam

[Jianxff]

As title, I test svo pro on my webcam, just mono rgb, no IMU, no BA and no ceres-backend.
It initialized good and fast, but the local landmark shrunk into a ball and the trajectory is wrong as also, and it is not reported as tracking-lost.
Looks like bad depth filter or something wrong else, I was confused.
Maybe there are some important parameter settings in config files?