Re: Frame drop when Using GMSK en UDP

[Marcus Müller]

Hi Quenten,

you're using multiple deprecated blocks; especially the packet 
encooder/decoder are simply buggy and drop data. (Also, it's 
misconfigured, but properly configuring it won't help. Don't use it.)

Also, while your computer might be too slow, the Throttle guarantees 
that the UDP source has to drop UDP packets if your data rate is higher 
than 500 kB/s...

So,

1. Replace deprecated WX GUI with Qt GUI

2. Remove all throttles

3. replace packet encoder/decoder with appropriate packet transmission 
example from gr-digital


You'll notice that a video stream is a lot of data, and that 500 kHz 
bandwidth simply won't do with GMSK to transport that amount of data. 
Which means you'll need more bandwidth. Which means you'll see a 
frequency-selective channel. Which means you need some equalization, or 
a multicarrier scheme! The OFDM-examples in gr-digital will be of most 
interest to you.

Best regards,

Marcus

On 4/24/20 10:05 AM, Quenten . wrote:
> Hello,
> I am trying to stream (de)mod a live video with to use of GNU radio. 
> from my windows 10 PC. These are the steps I follow:
> 1)Steam using OBS to an RTMP server
> 2)Use ffmpeg to get this stream form OBS and send it to UDP (port:9999 
> ; IP:127.0.0.1).
> 3) Do GMSK mod en demod
> 4) Save it to a file sink
>
> Here is the program:
> image.png
> I also get a warning from GNU: *WARN: Too much data; dropping packet. 
> *But I think this is because my PC is to slow.
>
> If someone can help it would be appreciated.
>
> Best regards,
>
> Q