How to read live output from another process ?

[Ferhat Kurtulmuş]

On Friday, 23 June 2023 at 23:37:29 UTC, Vinod K Chandran wrote:
> Hi all,
> I am trying to create a program which burns time codes to a 
> video. I am using ffmpeg for this. So far, I can successfully 
> start ffmpeg in another thread and stop it when I need. But I 
> can't read the live outputs from ffmpeg. This is my code.
> ```d
> void onBtnBurnClick(Control c, EventArgs e) {
> 	if (!burnStarted) {
> 		burnStarted = true;
> 		btnBurn.text = "Stop Burning";
> 		auto ffCmd = makeFFMPEGCommand(selVideo);
>           // ffPipe is a global ProcessPipes
> 		auto tsk = task!runFFMPEG(ffCmd, &ffPipe, frm.handle);
> 		tsk.executeInNewThread();
> 	} else {
> 		ffPipe.stdin.writeln("q");
> 		ffPipe.stdin.close();
> 		btnBurn.text = "Burn Time Code";
> 	}
> }
> ```
> This is a button's click event.
I used something similar here:

https://github.com/aferust/oclcv/blob/main/examples/threshold-video/source/app.d