The latest production software allows you to set the PMT, Video and Audio PIDs independently for MPEG-2. It is the PCR PID that is tied to the video PID. As I understand it, GB3UD needs the PMT PID set to 32 which is possible with the Portsdown. Grateful if you get a chance to test it.
Tested with a stereo audiogenerator and UTV007 USB Videograbber.
Attached a screenshot of the VLC Codecinformation, Samplerate 11025 Hz instead of 48000.
re latency - I was using the picam on my portsdown txing on 146.5MHz 333ksps into GB3FT but from looking at the local signal progress the delay seems to be in the streaming rx on 1315MHz which is a Comag SL30/12 into videocap dongle into RPI3 Portsdown code streaming to BATC.
So my bet is it's something to do with the videocap dongle /rpi streaming.
Quite amazed it has enough memory to buffer up so much video, but I do notice that sometimes just as it's about caught up it sometimes gets a bit confused and sends stuff out of order.
For instance if it is streaming the test card and I start to transmit, then after about 30 seconds it'll send a few frames of my transmission, then test card for a few seconds then finally my transmission.
This despite my transmission being solid as witnessed locally direct.
Hope all this makes sense and is of some use.
I've started a Wiki Page here https://wiki.batc.tv/Repeater_Streaming and will update it with details of the hardware switching when that is released.
I have not yet managed to reproduce the long delays being reported. Next time someone sees it, please can they close their browser and restart it and see if the delay reduces. I think that some of the problem might be in the receiving browser, but am happy to be proved wrong - I just need to know!
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