private static void SetupDownload(YoutubeDL ydl)
{
ydl.process = new Process {
StartInfo = ydl.processStartInfo, EnableRaisingEvents = true
};
ydl.stdOutputTokenSource = new CancellationTokenSource();
ydl.stdErrorTokenSource = new CancellationTokenSource();
ydl.process.Exited += (sender, args) => ydl.KillProcess();
// Note that synchronous calls are needed in order to process the output line by line.
// Asynchronous output reading results in batches of output lines coming in all at once.
// The following two threads convert synchronous output reads into asynchronous events.
ThreadPool.QueueUserWorkItem(ydl.StandardOutput, ydl.stdOutputTokenSource.Token);
ThreadPool.QueueUserWorkItem(ydl.StandardError, ydl.stdErrorTokenSource.Token);
if (ydl.Info != null)
{
ydl.StandardOutputEvent += (sender, output) => ydl.Info.ParseOutput(sender, output.Trim());
ydl.StandardErrorEvent += (sender, output) => ydl.Info.ParseError(sender, output.Trim());
}
ydl.process.Start();
}
private void UiDownloadButton_Click(object sender, EventArgs e)
{
string url = uiUrlTextBox.Text;
if (String.IsNullOrWhiteSpace(url))
{
MessageBox.Show("Please enter a video URL", "No URL Entered", MessageBoxButtons.OK, MessageBoxIcon.Error);
uiUrlTextBox.Focus();
return;
}
uiDownloadButton.Enabled = false;
string videoLocation = Path.Combine(Constants.VideoCacheLocation, "temp_video_download.mp4");
this.InvokeIfRequired(() => uiStatusLabel.Text = "Starting download... Please wait as this can take a few seconds to start.");
try
{
youtubeDl = new YoutubeDL
{
YoutubeDlPath = "youtube-dl.exe",
VideoUrl = url,
};
youtubeDl.Options.FilesystemOptions.Output = videoLocation;
youtubeDl.Options.GeneralOptions.IgnoreErrors = true;
youtubeDl.PrepareDownload();
youtubeDl.Info.PropertyChanged += (o, args) =>
{
DownloadInfo info = (DownloadInfo)o;
string status = info.Status;
this.InvokeIfRequired(() => uiDownloadProgressBar.Value = info.VideoProgress);
this.InvokeIfRequired(() => uiStatusLabel.Text = $"Status: {status} Video size: {info.VideoSize} Download speed: {info.DownloadRate} ETA: {info.Eta}");
if (status == "Error")
{
this.InvokeIfRequired(() => uiStatusLabel.Text = "Error downloading video.");
this.InvokeIfRequired(() => uiDownloadButton.Enabled = true);
youtubeDl.KillProcess();
}
if (status == "Done" || info.VideoProgress == 100)
{
this.InvokeIfRequired(() => uiDownloadButton.Enabled = true);
this.InvokeIfRequired(() => uiStatusLabel.Text = "Status: Download complete. Processing video.");
if (!hasFired) //this can fire multiple times, so stop it from happening with flag. Need to reset after download completed!
{
hasFired = true;
youtubeDl.KillProcess();
VideoDownloadComplete?.Invoke(this, EventArgs.Empty);
this.InvokeIfRequired(() => Close());
}
}
};
youtubeDl.DownloadAsync();
}
catch (ArgumentOutOfRangeException)
{
MessageBox.Show("An error has occured attempting to download this video.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
