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Add async support for video generation process ✨ #8916

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Add async support for video generation process ✨ #8916

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23d2107
Add async support for video generation process
ivandrofly Oct 18, 2024
1dad8d4
Refactor comment for clarity
ivandrofly Oct 18, 2024
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40 changes: 26 additions & 14 deletions src/ui/Forms/GenerateVideoWithSoftSubs.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -13,14 +13,15 @@
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using MessageBox = Nikse.SubtitleEdit.Forms.SeMsgBox.MessageBox;

namespace Nikse.SubtitleEdit.Forms
{
public sealed partial class GenerateVideoWithSoftSubs : Form
{
private bool _abort;
private volatile bool _abort;
private readonly Subtitle _subtitle;
private VideoInfo _videoInfo;
private string _inputVideoFileName;
Expand Down Expand Up @@ -434,7 +435,7 @@ private void OutputHandler(object sendingProcess, DataReceivedEventArgs outLine)
_log?.AppendLine(outLine.Data);
}

private void buttonGenerate_Click(object sender, EventArgs e)
private async void buttonGenerate_Click(object sender, EventArgs e)
{
if (_softSubs.Count == 0)
{
Expand Down Expand Up @@ -499,7 +500,7 @@ private void buttonGenerate_Click(object sender, EventArgs e)

var stopWatch = Stopwatch.StartNew();

RunEmbedding();
await RunEmbedding();

MillisecondsEncoding = stopWatch.ElapsedMilliseconds;
groupBoxSettings.Enabled = true;
Expand Down Expand Up @@ -592,7 +593,7 @@ private string SuggestNewVideoFileName()
return fileName;
}

private void RunEmbedding()
private async Task RunEmbedding()
{
var process = GetFfmpegProcess(_inputVideoFileName, VideoFileName);
_log.AppendLine("ffmpeg arguments: " + process.StartInfo.Arguments);
Expand All @@ -607,20 +608,31 @@ private void RunEmbedding()
labelNotSupported.Text = string.Empty;
labelPleaseWait.Text = LanguageSettings.Current.General.PleaseWait;
Cursor = Cursors.WaitCursor;
process.Start();
process.BeginOutputReadLine();
process.BeginErrorReadLine();

while (!process.HasExited)
await Task.Run(() =>
{
Application.DoEvents();
WindowsHelper.PreventStandBy();
System.Threading.Thread.Sleep(100);
if (_abort)
process.Start();
process.BeginOutputReadLine();
process.BeginErrorReadLine();

var timeSpent = 1; // process.ExitTime - DateTime.Now;
while (!process.HasExited && !process.WaitForExit(1000))
{
process.Kill();
// ensure standby prevention every 30 seconds
if (timeSpent++ % 30 == 0)
{
WindowsHelper.PreventStandBy();
}

if (_abort)
{
process.Kill();
break;
}
}
}

process.Dispose();
}).ConfigureAwait(true);
}
finally
{
Expand Down