static async Task ConvertFile(string filename)
{
try
{
await Task.CompletedTask;
filename = System.IO.Path.GetFullPath(filename);
var imagingFactory = new WIC.WICImagingFactory();
var decoder = imagingFactory.CreateDecoderFromFilename(filename, Guid.Empty, WIC.StreamAccessMode.GENERIC_READ,
WIC.WICDecodeOptions.WICDecodeMetadataCacheOnLoad);
//ShowMetadata(decoder.GetFrame(0));
if (decoder.GetDecoderInfo().GetCLSID() == WIC.Decoder.Jpeg)
{
Console.WriteLine($"'{filename}' is already a JPEG file.");
return;
}
var output = imagingFactory.CreateStream();
output.InitializeFromFilename(System.IO.Path.ChangeExtension(filename, ".jpg"), WIC.StreamAccessMode.GENERIC_WRITE);
var encoder = imagingFactory.CreateEncoder(ContainerFormat.Jpeg);
encoder.Initialize(output, WICBitmapEncoderCacheOption.WICBitmapEncoderNoCache);
for (int i = 0; i < decoder.GetFrameCount(); i++)
{
var frame = decoder.GetFrame(i);
encoder.CreateNewFrame(out var frameJpg, null);
frameJpg.Initialize(null);
frameJpg.SetSize(frame.GetSize());
frameJpg.SetResolution(frame.GetResolution());
frameJpg.SetPixelFormat(frame.GetPixelFormat());
var reader = frame.AsMetadataBlockReader();
var count = reader.GetCount();
//Get the EXIF data from the original photo.
var metadataReader = frame.GetMetadataQueryReader();
var metadataWriter = frameJpg.GetMetadataQueryWriter();
foreach (var name in metadataReader.GetNamesRecursive())
{
try {
var val = metadataReader.GetMetadataByName(name);
if (name.StartsWith("/ifd/"))
{
metadataWriter.SetMetadataByName("/app1" + name.Replace("/ifd/{ushort=34665}/", "/ifd/exif/").Replace("/ifd/{ushort=34853}/", "/ifd/gps/"), val);
}
else if (name.StartsWith("/xmp/"))
{
metadataWriter.SetMetadataByName(name, val);
}
}
catch {
System.Diagnostics.Trace.WriteLine($"Error setting '{name}'");
}
}
var photoProperties = SystemProperties.Concat(SystemPhotoProperties.Concat(SystemGpsProperties));
foreach (var photoProp in photoProperties)
{
var action = "getting";
try
{
var val = metadataReader.GetMetadataByName(photoProp);
//System.Diagnostics.Trace.WriteLine($"{photoProp} = {val}");
action = "setting";
metadataWriter.SetMetadataByName(photoProp, val);
}
catch (Exception ex)
{
System.Diagnostics.Trace.WriteLine($"Error {action} '{photoProp}': " + ex.Message);
}
}
frameJpg.WriteSource(frame);
frameJpg.Commit();
frame = null;
frameJpg = null;
}
encoder.Commit();
output.Commit(WIC.STGC.STGC_DEFAULT);
encoder = null;
output = null;
}
catch (Exception ex)
{
Console.WriteLine($"Error converting file '{filename}': {ex.Message}");
System.Diagnostics.Trace.WriteLine($"Error converting file '{filename}': {ex.ToString()}");
}
}