DATV-Express Project

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G4GUO
Posts: 605
Joined: Tue Feb 16, 2010 12:51 pm

Re: DATV-Express Project

Post by G4GUO » Sun Apr 07, 2019 6:27 pm

Group is the multicast group address.
Source is the source address of the UDP stream, if you want to accept anyone set it to 0.0.0.0
if source is set to zero it assunmes the group address is not a multicast address.
Interface is the IP address on your network of the interface you want to use on your current machine.
You will only see multiple interfaces if you have more than 1 hardware interface on your machine.

Clear as mud (I used the same expressions that are used in the MS example I stole the code from).

- Charles

F1SSF
Posts: 64
Joined: Sat Nov 25, 2017 5:14 pm

Re: DATV-Express Project

Post by F1SSF » Mon Apr 08, 2019 5:14 am

Morning Charles,
.if you want to accept anyone set it to 0.0.0.0
if source is set to zero it assunmes the group address is not a multicast address.
Sorry perharps my English is not perfect (google too :lol: ) I don't understood
.Clear as mud
When I press PTT, my queue starts 0 to finish at 100%, what is root cause for you?

Happy day, 73 Franck

G4GUO
Posts: 605
Joined: Tue Feb 16, 2010 12:51 pm

Re: DATV-Express Project

Post by G4GUO » Mon Apr 08, 2019 10:19 am

1) Setting it to 0.0.0.0 means it ignores the source address field.

2) Your transport stream bitrate level is too high and does not match the DATV-Express transmitted bitrate (I do no transcoding).

- Charles

F1SSF
Posts: 64
Joined: Sat Nov 25, 2017 5:14 pm

Re: DATV-Express Project

Post by F1SSF » Mon Apr 08, 2019 10:56 am

👌Thank you

Charles, I have a problem to use UDP.
I have a batch file to genarate TS Stream on UDP/210.0.0.10:10000
When I control the flux on my lan with Wireshark, I can see TS flux from source to the correct destination .
But DATVExpress don't listen, I don't understand why, windows firewall is OK for Datvexpress and ffmpeg.
Can you help me please?
73 Franck
capture stream.PNG
capture stream.PNG (91.42 KiB) Viewed 308 times
datvexpress input.PNG
datvexpress input.PNG (18.04 KiB) Viewed 308 times

KenW6HHC
Posts: 289
Joined: Mon Jun 01, 2009 4:20 pm

Re: DATV-Express Project

Post by KenW6HHC » Fri Apr 12, 2019 12:50 pm

Just a quick report that Art WA8RMC received the latest batch of Serit NIM tuners on April 09.
He is now busy assembling the tuners onto MiniTiouner-Express boards and testing each unit.


73...de Ken W6HHC

G4GUO
Posts: 605
Joined: Tue Feb 16, 2010 12:51 pm

Re: DATV-Express Project

Post by G4GUO » Fri Apr 12, 2019 2:01 pm

Franck,

Try seting Group to 210.0.0.10 and source to 0.0.0.0

- Charles

F1SSF
Posts: 64
Joined: Sat Nov 25, 2017 5:14 pm

Re: DATV-Express Project

Post by F1SSF » Fri Apr 12, 2019 7:20 pm

Hi Charles,
yes it's good, I'm too purist :lol: for me source is source ..and me ffmpeg stream it is my source ;)
Many thank's
73 Franck F1SSF

VK5YYY
Posts: 75
Joined: Sun Sep 27, 2015 1:47 am

Re: DATV-Express Project

Post by VK5YYY » Sat Apr 13, 2019 7:32 am

Hi Folks

Finally got an I7 with intel chip set, Limemini/DATV-Express is performing better, manual is a great help too...THANKS!

Firstly: on S2 QPSK as I increase the Msys from 2.5 to 3 the sound on MT express and Divisor is fine
However sound doesn't work on my Strong Sat box @ <2.5Msys but is fine >3Msys
Can anyone suggest if this stems from the Express/Lime or the Sat box

Secondly: when Msym is increased above 3Msys the twiddle factor has been a challenge to get right
Whilst experimenting sometimes different adjustments require major twiddling
Is there any Twiddle on the fly, auto-twiddle or twiddle calibrator on the horizon, is there a way to calculate it?
There lots of variables and the processing of every PC is different (I could be half the trouble, my processing speed is nothing special)
Increased explanation in the manual would be appreciated, maybe a library of config files or a suggested starting point table

Thanks again for all your great work

Cheers Roger VK5YYY

GOOGLE SAYS: Twiddle- "twist, move, or fiddle with (something), typically in a purposeless or nervous way" sounds familiar :D

KenW6HHC
Posts: 289
Joined: Mon Jun 01, 2009 4:20 pm

Re: DATV-Express Project

Post by KenW6HHC » Mon Apr 15, 2019 2:13 pm

Just another quick report that Art WA8RMC has shipped a box of 30 MiniTiouner-Express units to England on April 11, for distribution within EU.
It will probably take at least two weeks to clear customs.

73...de Ken W6HHC

F1SSF
Posts: 64
Joined: Sat Nov 25, 2017 5:14 pm

Re: DATV-Express Project

Post by F1SSF » Fri Apr 19, 2019 5:18 am

Hi Charles and alls,
I am desperate :oops: ,I use normally my LIME in UDP input mode, I wanted to test my pluto again, I return with my LIME and I still find my problem, DATVExpress is deaf in UDP. I did not change anything, fire all, stream, listening are OK....
What do you think about this? What do you use like IP segment ?
udp.PNG
udp.PNG (15.08 KiB) Viewed 41 times
Thank you very much
73 Franck F1SSF

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