public async Task DownloadAsync(VideoDownloadOption videoOption, Video downloaVideo, Progress <double> progress,
CancellationToken cancellationToken, string fileName)
{
if (videoOption.StreamInfos == null)
{
throw new InvalidOperationException($"Video '{downloaVideo.Id}' contains no streams.");
}
if (fileName == null)
{
throw new ArgumentNullException(nameof(fileName));
}
var conversion = new ConversionRequestBuilder(fileName)
.SetFormat(videoOption.Format)
.SetPreset(ConversionPreset.Medium)
.Build();
IsLoading = true;
await _youtube.Videos.DownloadAsync(
videoOption.StreamInfos,
conversion,
progress,
cancellationToken
);
}
public static DownloadViewModel CreateDownloadViewModel(
this IViewModelFactory factory,
Video video,
string filePath,
string format,
VideoDownloadOption videoOption,
SubtitleDownloadOption?subtitleOption)
{
var viewModel = factory.CreateDownloadViewModel();
viewModel.Video = video;
viewModel.FilePath = filePath;
viewModel.Format = format;
viewModel.VideoOption = videoOption;
viewModel.SubtitleOption = subtitleOption;
return(viewModel);
}
public async Task DownloadAsync(
VideoDownloadOption videoDownloadOption,
SubtitleDownloadOption?subtitleDownloadOption,
string filePath,
IProgress <double>?progress = null,
CancellationToken cancellationToken = default)
{
await EnsureThrottlingAsync(cancellationToken);
try
{
var conversion = new ConversionRequestBuilder(filePath)
.SetFormat(videoDownloadOption.Format)
.SetPreset(ConversionPreset.Medium)
.Build();
await _youtube.Videos.DownloadAsync(
videoDownloadOption.StreamInfos,
conversion,
progress,
cancellationToken
);
if (subtitleDownloadOption != null)
{
var subtitleFilePath = Path.ChangeExtension(filePath, "srt");
// Not passing progress because it's insignificant and would require splitting
await _youtube.Videos.ClosedCaptions.DownloadAsync(
subtitleDownloadOption.TrackInfo,
subtitleFilePath,
null,
cancellationToken
);
}
}
finally
{
Interlocked.Decrement(ref _concurrentDownloadCount);
}
}
