[Interest] QProcess unbuffered

Scott Bloom scott at towel42.com
Mon Mar 6 02:11:13 CET 2023

I have an external executable (mkvalidator from https://www.matroska.org/downloads/mkvalidator.html

It never flushes the output, and it uses linefeed without carriage returns to overwrite existing text on the output.

The problem is, when I run it via QProcess (on windows, Qt 5.15.10), I get zero output until the process ends.  As if it was buffered, and the output was finally flushed

When running from the command line, I do get output continuously during the processing.

I setup a timer to waitForRead, didn't do anything. I cant seem to force the QProcess to read all stdout or stderror info.

Any thoughts?

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