private async Task <DynamicImageResponse> GetEmbeddedImage(Video item, ImageType type, CancellationToken cancellationToken)
{
MediaSourceInfo mediaSource = new MediaSourceInfo
{
VideoType = item.VideoType,
IsoType = item.IsoType,
Protocol = item.PathProtocol ?? MediaProtocol.File,
};
string[] imageFileNames = type switch
{
ImageType.Primary => _primaryImageFileNames,
ImageType.Backdrop => _backdropImageFileNames,
ImageType.Logo => _logoImageFileNames,
_ => Array.Empty <string>()
};
if (imageFileNames.Length == 0)
{
_logger.LogWarning("Attempted to load unexpected image type: {Type}", type);
return(new DynamicImageResponse {
HasImage = false
});
}
// Try attachments first
var attachmentStream = _mediaSourceManager.GetMediaAttachments(item.Id)
.FirstOrDefault(attachment => !string.IsNullOrEmpty(attachment.FileName) &&
imageFileNames.Any(name => attachment.FileName.Contains(name, StringComparison.OrdinalIgnoreCase)));
if (attachmentStream != null)
{
return(await ExtractAttachment(item, attachmentStream, mediaSource, cancellationToken));
}
// Fall back to EmbeddedImage streams
var imageStreams = _mediaSourceManager.GetMediaStreams(new MediaStreamQuery
{
ItemId = item.Id,
Type = MediaStreamType.EmbeddedImage
});
if (imageStreams.Count == 0)
{
// Can't extract if we don't have any EmbeddedImage streams
return(new DynamicImageResponse {
HasImage = false
});
}
// Extract first stream containing an element of imageFileNames
var imageStream = imageStreams
.FirstOrDefault(stream => !string.IsNullOrEmpty(stream.Comment) &&
imageFileNames.Any(name => stream.Comment.Contains(name, StringComparison.OrdinalIgnoreCase)));
// Primary type only: default to first image if none found by label
if (imageStream == null)
{
if (type == ImageType.Primary)
{
imageStream = imageStreams[0];
}
else
{
// No streams matched, abort
return(new DynamicImageResponse {
HasImage = false
});
}
}
var format = imageStream.Codec switch
{
"mjpeg" => ImageFormat.Jpg,
"png" => ImageFormat.Png,
"gif" => ImageFormat.Gif,
_ => ImageFormat.Jpg
};
string extractedImagePath =
await _mediaEncoder.ExtractVideoImage(item.Path, item.Container, mediaSource, imageStream, imageStream.Index, format, cancellationToken)
.ConfigureAwait(false);
return(new DynamicImageResponse
{
Format = format,
HasImage = true,
Path = extractedImagePath,
Protocol = MediaProtocol.File
});
}