Hi, i have a Qt Ui(pyQt in use), which on click of a button launches a 
subprocess(using Popen) whic is used for rendering of frames, now i need to 
update the progress bar in the Ui when each frame renders out,that means i need 
to send back some message from the subprocess to the Ui, also i need to receive 
a message from the subprocess when the job gets completed.

Kindly help, stuck with this issue.

Thanks in advance

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