Tvheadend

SH4 CPU based
https://github.com/Audioniek/buildsystem + https://github.com/Audioniek/StartHere
My Octagon SF1028p (Atevio AV7500) dual dvb-s2 stb work perfect, except missing CI slot's but oscam can use card slot's

        echo "Target receivers:" 
        echo
        echo "  Kathrein             Fortis" 
        echo "    1)  UFS-910          7)  FS9000 / FS9200 (formerly Fortis HDbox)" 
        echo "    2)  UFS-912          8)  HS9510 (formerly Octagon SF1008P)" 
        echo "    3)  UFS-913          9*) HS8200 (bootloader 6.00, formerly Atevio AV7500)" 
        echo "    4)  UFS-922         10)  HS7110" 
        echo "    5)  UFC-960         11)  HS7119" 
        echo "                        12)  HS7420" 
        echo "  Topfield              13)  HS7429" 
        echo "    6)  TF77X0 HDPVR    14)  HS7810A" 
        echo "                        15)  HS7819" 
        echo
        echo "  AB IPBox             Cuberevo" 
        echo "   16)  55HD            19)  id." 
        echo "   17)  99HD            20)  mini" 
        echo "   18)  9900HD          21)  mini2" 
        echo "   19)  9000HD          22)  250HD" 
        echo "   20)  900HD           23)  9500HD / 7000HD" 
        echo "   21)  910HD           24)  2000HD" 
        echo "   13)  91HD            25)  mini_fta / 200HD" 
        echo "                        26)  3000HD / Xsarius Alpha" 
        echo
        echo "  Fulan                Atemio" 
        echo "   27)  Spark           29)  AM520" 
        echo "   28)  Spark7162       30)  AM530" 
        echo
        echo "  Various sh4-based receivers" 
        echo "   31)  Edision Argus VIP1 v1 [ single tuner + 2 CI + 2 USB ]" 
        echo "   32)  SpiderBox HL-101" 
        echo "   33)  B4Team ADB 5800S" 
        echo "   34)  Vitamin HD5000" 
        echo "   35)  SagemCom 88 series" 
        echo "   36)  Ferguson Ariva @Link 200" 
        echo
        echo "  arm-based receivers" 
        echo "   37)  Mut@nt HD51" 
        echo "   38)  VU Solo 4k" 

forgot for Picture on tv from STB

You mention

echo "  arm-based receivers" 
        echo "   37)  Mut@nt HD51" 
        echo "   38)  VU Solo 4k"

I have an OpenBox S6000 box which runs as a Vu Solo clone.

Would I be able to install TVheadend on it?

Basically you need a buildroot for specific platform.

I think openelec has builds for wetek play. AFAIK tvheadend is a backend option available in it. S2 tuner module for the play is cheap.