private async Task ConvertFiles()
{
IsConversionInProgress = true;
StartConversionCommand.RaiseCanExecuteChanged();
BrowseTargetFolderCommand.RaiseCanExecuteChanged();
if (!Directory.Exists(TargetFolderPath))
{
Directory.CreateDirectory(TargetFolderPath);
}
var converter = new MediaConverter(TargetFolderPath);
await converter.ConvertFiles(InputItems.Select((item) => item.FilePath).ToArray());
InputItems.Clear();
IsConversionInProgress = false;
StartConversionCommand.RaiseCanExecuteChanged();
BrowseTargetFolderCommand.RaiseCanExecuteChanged();
}