I believe that the problem is that your stream is not an MP4 container format. Spec of your cam says:
Wireless-G Internet Home Monitoring
Standards IEEE 802.11g, IEEE 802.3, IEEE 802.3u
Ports Ethernet, Power
Cabling Type Cat5
Number of Antennas 1 Internal
Connector Type N/A
Detachable Antenna No
UPnP able/cert UPnP Advertise
.Net Support N/A
Security Features WEP-64, WEP-128, WPA, WPA2
Image Sensor CMOS
Lens Fixed Focus
Resolution 640 x 480, 320 x 240, 160 x 128
Relative Illumination 5.1 Lux
Effective Focus 3 mm
Field of View 61.48 degrees
Compression Algorithm MPEG-4 and MJPEG
Record File Format ASF
Brightness Auto/Manual AdjustmentSo it seems that your stream is ASF container and not MP4 (See ISO 14496-12). Unfortunately there's no ASF splitter in UMC release yet.
Your stream is ASF stream with one MS MPEG-4 v3 video stream inside.
So you need ASF splitter anyway. I hope it will be present in the next version of UMC.
But unfortunately UMC mpeg4 decoder is unable to decode MS MPEG-4 v3. This standard is closed. Our decoder supports ISO mpeg4 video (ISO 14496-12) only.
Can you choose the output stream format in your cam?