private async ValueTask <IMemoryOwner <byte> > GetMovieImageAsync(string path, int width, int height, ThumbnailResizeType resizeType, ThumbnailFormatType formatType, CancellationToken cancellationToken = default)
{
try
{
var arguments = $"-loglevel error -i \"{path}\" -vf thumbnail=30 -frames:v 1 -f image2 pipe:1";
using var process = Process.Start(new ProcessStartInfo("ffmpeg", arguments)
{
CreateNoWindow = true,
UseShellExecute = false,
RedirectStandardOutput = true,
RedirectStandardError = false,
});
using var baseStream = process !.StandardOutput.BaseStream;
using var inStream = new RecyclableMemoryStream(_bytesPool);
using var outStream = new RecyclableMemoryStream(_bytesPool);
await baseStream.CopyToAsync(inStream, cancellationToken);
inStream.Seek(0, SeekOrigin.Begin);
await process.WaitForExitAsync(cancellationToken);
this.ConvertImage(inStream, outStream, width, height, resizeType, formatType);
return(outStream.ToMemoryOwner());
}
catch (Exception e)
{
_logger.Warn(e);
throw;
}
}
private async ValueTask <ThumbnailGeneratorGetThumbnailResult> GetPictureThumbnailAsync(NestedPath filePath, ThumbnailGeneratorGetThumbnailOptions options, CancellationToken cancellationToken = default)
{
var ext = filePath.GetExtension().ToLower();
if (!_pictureTypeExtensionList.Contains(ext))
{
return(new ThumbnailGeneratorGetThumbnailResult(ThumbnailGeneratorGetThumbnailResultStatus.Failed));
}
try
{
var fileLength = await _fileSystem.GetFileSizeAsync(filePath, cancellationToken);
var fileLastWriteTime = await _fileSystem.GetFileLastWriteTimeAsync(filePath, cancellationToken);
using (var inStream = await _fileSystem.GetFileStreamAsync(filePath, cancellationToken))
using (var outStream = new RecyclableMemoryStream(_bytesPool))
{
this.ConvertImage(inStream, outStream, options.Width, options.Height, options.ResizeType, options.FormatType);
outStream.Seek(0, SeekOrigin.Begin);
var image = outStream.ToMemoryOwner();
var fileMeta = new FileMeta(filePath, (ulong)fileLength, Timestamp.FromDateTime(fileLastWriteTime));
var thumbnailMeta = new ThumbnailMeta(options.ResizeType, options.FormatType, (uint)options.Width, (uint)options.Height);
var content = new ThumbnailContent(image);
var cache = new ThumbnailCache(fileMeta, thumbnailMeta, new[] { content });
await _thumbnailGeneratorRepository.ThumbnailCaches.InsertAsync(cache);
return(new ThumbnailGeneratorGetThumbnailResult(ThumbnailGeneratorGetThumbnailResultStatus.Succeeded, cache.Contents));
}
}
catch (NotSupportedException e)
{
_logger.Warn(e);
}
catch (OperationCanceledException e)
{
_logger.Debug(e);
}
catch (Exception e)
{
_logger.Error(e);
throw;
}
return(new ThumbnailGeneratorGetThumbnailResult(ThumbnailGeneratorGetThumbnailResultStatus.Failed));
}