Wansview W2 no connection to Alexa on Fire HD8 Tablet.

[hutis]

Hello everybody,
I want to connect a Wansview W2 with Alexa on Fire HD8 Tablet. Unfortunately it does not work.
I have already tried the solution for the W3 camera and disabled audio in the camera stream. Unfortunately unsuccessful.
My stream is rtsp:// ip-adress: 554/live/ch0.
It works fine in VLC.
Audio is disabled on the camera. Video codec is H264 and the resolution I have set to 1208 * 720. Camera settings:
AC frequency 60HZ
Resolution: 1280 * 720
Bit rate: 1024kps
Frame rate: 25
Stream Control: Variable Bitrate
Stream Type: without audio

Settings in Monocle:
rtsp: // IP address: 554/live/ch0
BASIC
admin
password
Resolution: 1280 * 720
Video H264
Audio codec NONE

Many thanks for your help.