IPTS in no longer working on Porstdown 2020

[G3GJA]

Two Portsdown 2020 systems have been tried with IPTS in on transmit and IPTS monitor.

Neither work; has the feature been disabled? The Wiki suggests that it should still work.

Clive

[G8GKQ]

Hi Clive

It is still working - I've just tested it on both a Portsdown 2020 with a 3.5 inch screen and one with a 7 inch screen (fed from a Portsdown 4).

The IPTS monitor uses OMXPlayer (not VLC, which is used in the Portsdown 4), and is very fussy. The capabilities:

• It will display an MPEG-2 TS, with or without an audio channel
• It will display an H264 TS, but only if there is an audio channel. Note that Test Card transmitted from Portsdown does not have an audio channel.
• It will not display H264 if encoded by an SR Systems encoder (I have yet to find what the issue is with the SR Systems encoders)
• It will not display H265

IPTS Transmit is also fussy:

• It will only transmit MPEG-2 if there is an audio channel
• It will only transmit H264 if there is an audio channel
• I'm unable to test SR Systems encoder or H265, but they might work

Hope that helps

Dave

[G3GJA]

Hi Dave

Thanks for the info. I've now succeeded with some excellent results at symbol rates from 500 to 2000kS/s using an H264 stream generated from FreeStreamCoder v2.79 and OBS Studio. 250 & 333kS/s work too, with reasonable results.

Using IPTS with the Portsdown 2020 is not mentioned in the Wiki section on 'Tested modes of operation using the Filter-Modulator board' so I've added what I found to work.

73

Clive

[G8GKQ]

Hi Clive

Pleased that it is working for you.

And thanks for updating the Wiki - I wish more people would!

Dave