/// <inheritdoc />
public async Task DownloadVideoAsync(string videoId, string filePath, string format, ConversionPreset preset,
IProgress <double>?progress = null, CancellationToken cancellationToken = default)
{
var streamManifest = await _youtube.Videos.Streams.GetManifestAsync(videoId);
await DownloadVideoAsync(streamManifest, filePath, format, preset, progress, cancellationToken);
}
/// <inheritdoc />
public async Task DownloadAndProcessMediaStreamsAsync(IReadOnlyList <IStreamInfo> streamInfos,
string filePath, string format, ConversionPreset preset,
IProgress <double>?progress = null, CancellationToken cancellationToken = default)
{
// Determine if transcoding is required for at least one of the streams
var avoidTranscoding = !streamInfos.Any(s => IsTranscodingRequired(s.Container, format));
// Set up progress-related stuff
var progressMixer = progress != null ? new ProgressMixer(progress) : null;
var downloadProgressPortion = avoidTranscoding ? 0.99 : 0.15;
var ffmpegProgressPortion = 1 - downloadProgressPortion;
var totalContentLength = streamInfos.Sum(s => s.Size.TotalBytes);
// Keep track of the downloaded streams
var streamFilePaths = new List <string>();
try
{
// Download all streams
foreach (var streamInfo in streamInfos)
{
// 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.TotalBytes / totalContentLength);
// Download stream
await _youtube.Videos.Streams.DownloadAsync(streamInfo, streamFilePath, streamDownloadProgress, cancellationToken);
}
// Set up process progress handler
var ffmpegProgress = progressMixer?.Split(ffmpegProgressPortion);
// Process streams (mux/transcode/etc)
await _ffmpeg.ConvertAsync(filePath, streamFilePaths, format, preset, avoidTranscoding, 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)
{
File.Delete(streamFilePath);
}
}
}
/// <inheritdoc />
public async Task DownloadVideoAsync(StreamManifest streamManifest, string filePath, string format, ConversionPreset preset,
IProgress <double>?progress = null, CancellationToken cancellationToken = default)
{
var streamInfos = GetBestMediaStreamInfos(streamManifest, format).ToArray();
await DownloadAndProcessMediaStreamsAsync(streamInfos, filePath, format, preset, progress, cancellationToken);
}