private void buttonPreview_Click(object sender, EventArgs e)
{
try
{
buttonPreview.Enabled = false;
labelPreviewPleaseWait.Visible = true;
Cursor = Cursors.WaitCursor;
// generate blank video
var tempVideoFileName = Path.Combine(Path.GetTempPath(), Guid.NewGuid() + ".mkv");
var process = VideoPreviewGenerator.GenerateVideoFile(
tempVideoFileName,
2,
(int)numericUpDownWidth.Value,
(int)numericUpDownHeight.Value,
Color.Black,
true,
25,
null);
process.Start();
while (!process.HasExited)
{
System.Threading.Thread.Sleep(100);
Application.DoEvents();
}
// make temp assa file with font
var assaTempFileName = GetAssaFileName(tempVideoFileName);
var sub = new Subtitle();
sub.Header = _assaSubtitle.Header;
sub.Paragraphs.Add(new Paragraph(GetPreviewParagraph()));
if (!_isAssa)
{
SetStyleForNonAssa(sub);
}
FixRightToLeft(sub);
FileUtil.WriteAllText(assaTempFileName, new AdvancedSubStationAlpha().ToText(sub, string.Empty), new TextEncoding(Encoding.UTF8, "UTF8"));
// hardcode subtitle
var outputVideoFileName = Path.Combine(Path.GetTempPath(), Guid.NewGuid() + ".mp4");
process = GetFfmpegProcess(tempVideoFileName, outputVideoFileName, assaTempFileName);
process.Start();
process.BeginOutputReadLine();
process.BeginErrorReadLine();
while (!process.HasExited)
{
System.Threading.Thread.Sleep(100);
Application.DoEvents();
}
string bmpFileName;
try
{
bmpFileName = VideoPreviewGenerator.GetScreenShot(outputVideoFileName, "00:00:01");
using (var bmp = new Bitmap(bmpFileName))
{
using (var form = new ExportPngXmlPreview(bmp))
{
form.AllowNext = false;
form.AllowPrevious = false;
labelPreviewPleaseWait.Visible = false;
form.ShowDialog(this);
}
}
}
catch
{
if (comboBoxVideoEncoding.Text.EndsWith("_amf"))
{
MessageBox.Show("Unable to generate video with AMD hardware acceleration!");
}
else if (comboBoxVideoEncoding.Text.EndsWith("_nvenc"))
{
MessageBox.Show("Unable to generate video with Nvidia hardware acceleration!");
}
else
{
MessageBox.Show("Unable to generate video!");
}
Cursor = Cursors.Default;
buttonPreview.Enabled = true;
labelPreviewPleaseWait.Visible = false;
return;
}
try
{
File.Delete(tempVideoFileName);
File.Delete(assaTempFileName);
File.Delete(outputVideoFileName);
File.Delete(bmpFileName);
}
catch
{
// ignore
}
}
finally
{
Cursor = Cursors.Default;
buttonPreview.Enabled = true;
labelPreviewPleaseWait.Visible = false;
}
}
private void buttonPreview_Click(object sender, EventArgs e)
{
try
{
buttonPreview.Enabled = false;
labelPreviewPleaseWait.Visible = true;
Cursor = Cursors.WaitCursor;
// generate blank video
var tempVideoFileName = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString() + ".mkv");
var process = VideoPreviewGenerator.GenerateVideoFile(
tempVideoFileName,
2,
(int)numericUpDownWidth.Value,
(int)numericUpDownHeight.Value,
Color.Black,
true,
25);
process.Start();
while (!process.HasExited)
{
System.Threading.Thread.Sleep(100);
Application.DoEvents();
}
// make temp assa file with font
var assaTempFileName = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString() + ".ass");
var sub = new Subtitle();
sub.Header = _assaSubtitle.Header;
sub.Paragraphs.Add(new Paragraph(GetPreviewText(), 0, 10_000));
if (numericUpDownFontSize.Visible) // not ASSA format
{
SetStyleForNonAssa(sub);
}
FixRightToLeft(sub);
File.WriteAllText(assaTempFileName, new AdvancedSubStationAlpha().ToText(sub, string.Empty));
// hardcode subtitle
var outputVideoFileName = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString() + ".mp4");
process = GetFfmpegProcess(tempVideoFileName, outputVideoFileName, assaTempFileName);
process.Start();
process.BeginOutputReadLine();
process.BeginErrorReadLine();
while (!process.HasExited)
{
System.Threading.Thread.Sleep(100);
Application.DoEvents();
}
Cursor = Cursors.Default;
var bmpFileName = VideoPreviewGenerator.GetScreenShot(outputVideoFileName, "00:00:01");
using (var bmp = new Bitmap(bmpFileName))
{
using (var form = new ExportPngXmlPreview(bmp))
{
form.AllowNext = false;
form.AllowPrevious = false;
labelPreviewPleaseWait.Visible = false;
form.ShowDialog(this);
}
}
try
{
File.Delete(tempVideoFileName);
File.Delete(assaTempFileName);
File.Delete(outputVideoFileName);
File.Delete(bmpFileName);
}
catch
{
// ignore
}
}
finally
{
Cursor = Cursors.Default;
buttonPreview.Enabled = true;
labelPreviewPleaseWait.Visible = false;
}
}
