VLC unable to connect to offered streams from mbms modem

[Simons-CSharp]

I have the mbms modem running and it is offering 6 streams to me (see picture )

When I run VLC and use the Media>Open Network Stream> and enter rtp://232.1.1.112:40002 . I get the error cannot join multicast group. No such device.

Things I've tried: In the 5gmag-rt file I have change the interface from eno1 to my devices (enp0s31f6)

It seems the modem is not tunnelling the streams.

Do you have any ideas?

Thank-you Simon

[dsilhavy]

Hi Simon, I checked with the 3MHz RTP sample stream (https://obeca-testdaten.s3.eu-central-1.amazonaws.com/3MHz_MCS16_1kHz25_RTP_3.5.raw) and it works for me. Some suggestions:

• Please try with the same sample file I did
• Please also check if you are using Wifi or a network cable. If you are on Wifi your network adapter is named something like wlp3s0 . Then you need to adjust /etc/default/5gmag-rt accordingly
• For playback you can also use ffplay (part of ffmpeg) : For instance ffplay rtp://239.11.4.10:5520

Please note that the sample recordings seem to have some problems with macroblocks and missing packets. So the playback will probably not be very stable but you should see a video with some decoding artifacts

[dsilhavy]

One more thing: Try to add an @ to the address in VLC: rtp://@239.11.4.10:5520

[Simons-CSharp]

Hi, IT would appear to be a CPU load issue. My set up is i7 Gen7. The gui is showing 99% load, so I think for 6 streams I'll need a more powerful CPU. I'll update this message when I try a more powerful PC.

[Simons-CSharp]

Update - changed for a Ryzen based system and streams all appeared. All that was needed was more CPU power for 6 streams! Thanks.