Limit priority of transcription process

Seems to help reduce impact on time-sensitive apps like OBS.

1 files changed, 9 insertions, 0 deletions

diff --git a/GUI/GUI/GUI/PythonWrapper.cpp b/GUI/GUI/GUI/PythonWrapper.cpp
index 037d961..9855b00 100644
--- a/GUI/GUI/GUI/PythonWrapper.cpp
+++ b/GUI/GUI/GUI/PythonWrapper.cpp
@@ -281,6 +281,15 @@ bool PythonWrapper::InvokeCommandWithArgs(const std::string& cmd,
 		CloseHandle(pi.hThread);
 		});
 
+	// Set spawned process priority to low, to avoid lagging things like OBS.
+	if (!SetPriorityClass(pi.hProcess, BELOW_NORMAL_PRIORITY_CLASS)) {
+		std::ostringstream err_oss;
+		err_oss << "Error while executing python command \"" << cmd_oss.str()
+			<< "\": Failed to reduce priority class: " << GetWin32ErrMsg();
+		out_cb("", err_oss.str());
+		return false;
+	}
+
 	// While the process is running, drain output and send input every 10 ms.
 	DWORD timeout_ms = 10;
 	DWORD ret = WAIT_TIMEOUT;