Ok. I have built joeuser's tvh by myself with ubuntu. it runs good for non-crypted and biss-crypted channels, but still no pv. I compiled the addon using Libreelec source's toolchain. I modified package.mk content to download joeuser's source such that: PKG_URL="https://github.com/joeusercz/tvheadend/archive/extended_cw.tar.gz". and used cmd "PROJECT=WeTek_Play ARCH=arm ./scripts/create_addon tvheadend42". Toolchain build took about 1 hour, the addon build took 5-10 seconds. And my oscam ver is oscam-1.20-HPB-r747-EMU-r432-764-r11397 - arm-linux-gnueabihf-libusb
Anyway, pv is not working with my k2pro which shares same cpu with wetek play 2. Here is the addon compiled by me.