Hi!
Sorry for the late answer. Last days have been buzy...
@futeko: I reflashed the Firmware a couple of times already. With different firmware versions, your custom firmware, different version of wrapper and kodi - always the same problem. Seems to me that there is any incompatibility in my network?! Right now as workaround I kept the custom firmware (I like that one and appreciate your wokr on it) and move all my video files to the internal HDD. In the long term I still would like to stream from the NAS, so I am still working on that issue or hoping for improvement with any updates.
@Maya93: Thanks for the help. Unfortunately Media Center almost never finds my NAS, even not with manual entry of IP path and share. So far, only once I could get a connection to my NAS via the Media Center. However in that one case it even worked then under kodi without "mount failed".
Consequently there are two points strange to me:
1. Why doesn't my q10 reliably find my NAS?
2. Why does my q10 independently of #1 stream music and photos without issues, but not any video files?
I need to mention that it is the 3rd HiMedia player (2x q10 pro, 1x q5 pro) with the same behaviour in my network.