Wireless Video Link Example

[youngmin]

Hi,

I'm also trying to wireless video link work.

Text message communication is OK. But an error (error code 74) occurs when receiving image/video data.

Symbol constellations fine but when processing "unflatten from string" function.

Why does this happen? and what should I do to fix this problem?

Thanks. 

Regards,

YoungMin

[Sarah_Y]

Hi YoungMin,

Would you mind posting your code?  It is very difficult to help troubleshoot and determine the root cause of your problem without knowing more details about how you communicating with your hardware.

Unfortunately, error 74 is a very generic error code and can occur for a number of different reasons.  Could you please also post the entire error message that you receive?

Other information that would be helpful for debugging would be what hardware you are using as well as what driver version.  The more information you are able to post, the better we can help troubleshoot your issue.

[youngmin]

Hi Sarah,

The code is example code NI provided at here

https://decibel.ni.com/content/docs/DOC-22728

And erorr code 74 occurs in the subvi named JPEG.vi at the point below.

And my hardware is two NI 2920's connected with MIMO cable (as I don't have Ethernet Hub to connect multiple USRP's)

Driver version is NI USRP-1.1 / FPGA,DSP Image is NI USRP 2920 version.

The error message is "Error 74 occured : Unflatten From String in JPEG.vi;>Receive.vi  Possible reasons : Collision of Memory or Data structure"

My PC's OS is Korean Win7 Home Premium, it might need to be considered as user folder path is slightly different from English version.

I attached a VI that contains decoded data and a image file show perfect constellation plot.

Hope these might help.

Thanks.

Regards,

YoungMin

[Amoorbird]

Hi sarah ... I want the modules that will open the wireless video file as every time I open the file I get many errors to run the transmitter and reciever ..in addition I work on labview 2017 ..please help me guys