/// <summary>
/// Downloads audio and saves it to the provided audioPath folder
/// </summary>
/// <param name="id">id of the youtube video</param>
/// <param name="audioPath">Path where file should be saved without extension at the end</param>
/// <returns></returns>
public async Task DownloadAudioAsync(string id, string audioPath)
{
MediaStreamInfoSet streamInfoSet = await client.GetVideoMediaStreamInfosAsync(id);
var audioInfo = streamInfoSet.Audio.WithHighestBitrate();
await client.DownloadMediaStreamAsync(audioInfo, audioPath);
}
public static async Task DownloadMusic(string url, FileInfo desinationFile)
{
if (desinationFile.Exists)
{
Console.WriteLine($"\t{desinationFile.Name} already downloaded. Skipping...");
return;
}
Console.Write($"\t-Downloading {desinationFile.Name}...");
//Get video
var vidId = YoutubeClient.ParseVideoId(url);
var streamInfo = await _client.GetVideoMediaStreamInfosAsync(vidId);
var stream = streamInfo.Audio.WithHighestBitrate();
var ext = stream.Container.GetFileExtension();
var videoDownloadFile = Path.ChangeExtension(Path.GetTempFileName(), ext);
await _client.DownloadMediaStreamAsync(stream, videoDownloadFile);
//Write video to file
Console.Write($"Done. Converting to mp3...");
//Extract mp3 from video
var result = await Conversion.Convert(videoDownloadFile, desinationFile.FullName)
.Start();
Console.WriteLine($"Done");
}
public async Task <string> Download(string url, Action <int> progressCallback, string newPath, bool onlyMusic)
{
string result = null;
var streamInfoSet = await client.GetVideoMediaStreamInfosAsync(url);
MediaStreamInfo stream = null;
if (onlyMusic)
{
stream = streamInfoSet.Audio.WithHighestBitrate();
}
else
{
stream = streamInfoSet.Muxed.WithHighestVideoQuality();
}
var fileExtension = stream.Container.GetFileExtension();
result = newPath + "." + fileExtension;
var fileStream = File.Create(result);
var progress = new DownladProgress(progressCallback);
await client.DownloadMediaStreamAsync(stream, fileStream, progress);
return(result);
}
/// <inheritdoc />
public async Task DownloadAndProcessMediaStreamsAsync(IReadOnlyList <MediaStreamInfo> mediaStreamInfos,
string filePath, string format,
IProgress <double> progress = null,
CancellationToken cancellationToken = default(CancellationToken))
{
mediaStreamInfos.GuardNotNull(nameof(mediaStreamInfos));
filePath.GuardNotNull(nameof(filePath));
format.GuardNotNull(nameof(format));
// Determine if transcoding is required for at least one of the streams
var transcode = mediaStreamInfos.Any(s => IsTranscodingRequired(s.Container, format));
// Set up progress-related stuff
var progressMixer = progress != null ? new ProgressMixer(progress) : null;
var downloadProgressPortion = transcode ? 0.15 : 0.99;
var ffmpegProgressPortion = 1 - downloadProgressPortion;
var totalContentLength = mediaStreamInfos.Sum(s => s.Size);
// Keep track of the downloaded streams
var streamFilePaths = new List <string>();
try
{
// Download all streams
foreach (var streamInfo in mediaStreamInfos)
{
// Generate file path
var streamIndex = streamFilePaths.Count + 1;
var streamFilePath = $"{filePath}.stream-{streamIndex}.tmp";
// Add file path to list
streamFilePaths.Add(streamFilePath);
// Set up download progress handler
var streamDownloadProgress =
progressMixer?.Split(downloadProgressPortion * streamInfo.Size / totalContentLength);
// Download stream
await _youtubeClient.DownloadMediaStreamAsync(streamInfo, streamFilePath, streamDownloadProgress, cancellationToken);
}
// Set up process progress handler
var ffmpegProgress = progressMixer?.Split(ffmpegProgressPortion);
// Process streams (mux/transcode/etc)
await _ffmpeg.ProcessAsync(streamFilePaths, filePath, format, transcode, ffmpegProgress, cancellationToken);
// Report completion in case there are rounding issues in progress reporting
progress?.Report(1);
}
finally
{
// Delete all stream files
foreach (var streamFilePath in streamFilePaths)
{
FileEx.TryDelete(streamFilePath);
}
}
}
