diff --git a/cinelerra-5.1/cinelerra/fileexr.C b/cinelerra-5.1/cinelerra/fileexr.C
index 998372b..5aa337b 100644
--- a/cinelerra-5.1/cinelerra/fileexr.C
+++ b/cinelerra-5.1/cinelerra/fileexr.C
@@ -42,6 +42,7 @@
 #include "ImfRgbaYca.h"
 #include "ImfVersion.h"
 
+
 class EXRIStream : public Imf::IStream
 {
 public:
@@ -120,15 +121,6 @@ void EXRIStream::clear()
 }
 
 
-
-
-
-
-
-
-
-
-
 EXROStream::EXROStream(VFrame *data)
  : Imf::OStream("mypath")
 {
@@ -161,14 +153,6 @@ void EXROStream::seekp(Imf::Int64 pos)
 
 
 
-
-
-
-
-
-
-
-
 FileEXR::FileEXR(Asset *asset, File *file)
  : FileList(asset, file, "EXRLIST", ".exr", FILE_EXR, FILE_EXR_LIST)
 {
@@ -191,6 +175,10 @@ const char* FileEXR::compression_to_str(int compression)
 	switch(compression)
 	{
 		case FileEXR::NONE: return "None"; break;
+		case FileEXR::B44: return "B44"; break;
+		case FileEXR::B44A: return "B44A"; break;
+		case FileEXR::DWAB: return "DWAB"; break;
+		case FileEXR::DWAA: return "DWAA"; break;
 		case FileEXR::PIZ: return "PIZ"; break;
 		case FileEXR::ZIP: return "ZIP"; break;
 		case FileEXR::ZIPS: return "ZIPS"; break;
@@ -209,6 +197,10 @@ int FileEXR::compression_to_exr(int compression)
 		case FileEXR::ZIP: return (int)Imf::ZIP_COMPRESSION; break;
 		case FileEXR::ZIPS: return (int)Imf::ZIPS_COMPRESSION; break;
 		case FileEXR::RLE: return (int)Imf::RLE_COMPRESSION; break;
+		case FileEXR::B44: return (int)Imf::B44_COMPRESSION; break;
+		case FileEXR::B44A: return (int)Imf::B44A_COMPRESSION; break;
+		case FileEXR::DWAA: return (int)Imf::DWAA_COMPRESSION; break;
+		case FileEXR::DWAB: return (int)Imf::DWAB_COMPRESSION; break;
 		case FileEXR::PXR24: return (int)Imf::PXR24_COMPRESSION; break;
 	}
 	return Imf::NO_COMPRESSION;
@@ -227,7 +219,14 @@ int FileEXR::str_to_compression(char *string)
 	if(!strcmp(compression_to_str(FileEXR::RLE), string))
 		return FileEXR::RLE;
 	if(!strcmp(compression_to_str(FileEXR::PXR24), string))
-		return PXR24;
+	if(!strcmp(compression_to_str(FileEXR::B44), string))
+		return FileEXR::B44;
+	if(!strcmp(compression_to_str(FileEXR::B44A), string))
+		return FileEXR::B44A;
+	if(!strcmp(compression_to_str(FileEXR::DWAA), string))
+		return FileEXR::DWAA;
+	if(!strcmp(compression_to_str(FileEXR::DWAB), string))
+		return FileEXR::DWAB;
 	return FileEXR::NONE;
 }
 
@@ -333,6 +332,8 @@ int FileEXR::read_frame(VFrame *frame, VFrame *data)
 	Imath::Box2i dw = file.header().dataWindow();
     int dx = dw.min.x;
     int dy = dw.min.y;
+	Imf::setGlobalThreadCount (4);
+
 	Imf::FrameBuffer framebuffer;
 	float **rows = (float**)frame->get_rows();
 	int components = BC_CModels::components(frame->get_color_model());
@@ -460,7 +461,7 @@ int FileEXR::write_frame(VFrame *frame, VFrame *data, FrameWriterUnit *unit)
 	VFrame *output_frame;
 	data->set_compressed_size(0);
 
-
+	Imf::setGlobalThreadCount (4);
 	int native_cmodel = asset->exr_use_alpha ? BC_RGBA_FLOAT : BC_RGB_FLOAT;
 	int components = BC_CModels::components(native_cmodel);
 
@@ -497,6 +498,8 @@ int FileEXR::write_frame(VFrame *frame, VFrame *data, FrameWriterUnit *unit)
 	Imf::Header header(output_frame->get_w(), output_frame->get_h());
 	header.compression() = (Imf::Compression)compression_to_exr(
 		asset->exr_compression);
+//	if(asset->exr_compression == DWAA || asset->exr_compression == DWAB)
+//	header.insert("dwaCompressionLevel", asset->exr_dwa_compression_level);
 	header.channels().insert("R", Imf::Channel(Imf::FLOAT));
 	header.channels().insert("G", Imf::Channel(Imf::FLOAT));
 	header.channels().insert("B", Imf::Channel(Imf::FLOAT));
@@ -539,15 +542,6 @@ FrameWriterUnit* FileEXR::new_writer_unit(FrameWriter *writer)
 
 
 
-
-
-
-
-
-
-
-
-
 EXRUnit::EXRUnit(FileEXR *file, FrameWriter *writer)
  : FrameWriterUnit(writer)
 {
@@ -562,14 +556,6 @@ EXRUnit::~EXRUnit()
 
 
 
-
-
-
-
-
-
-
-
 EXRConfigVideo::EXRConfigVideo(BC_WindowBase *parent_window, Asset *asset)
  : BC_Window(_(PROGRAM_NAME ": Video Compression"),
 	parent_window->get_abs_cursor_x(1), parent_window->get_abs_cursor_y(1),
@@ -634,6 +620,10 @@ void EXRCompression::create_objects()
 	add_item(new EXRCompressionItem(gui, FileEXR::ZIPS));
 	add_item(new EXRCompressionItem(gui, FileEXR::RLE));
 	add_item(new EXRCompressionItem(gui, FileEXR::PXR24));
+	add_item(new EXRCompressionItem(gui, FileEXR::B44));
+	add_item(new EXRCompressionItem(gui, FileEXR::B44A));
+	add_item(new EXRCompressionItem(gui, FileEXR::DWAA));
+	add_item(new EXRCompressionItem(gui, FileEXR::DWAB));
 }
 
 int EXRCompression::handle_event()
diff --git a/cinelerra-5.1/cinelerra/fileexr.h b/cinelerra-5.1/cinelerra/fileexr.h
index 3e47489..eac1c99 100644
--- a/cinelerra-5.1/cinelerra/fileexr.h
+++ b/cinelerra-5.1/cinelerra/fileexr.h
@@ -55,7 +55,11 @@ public:
 		ZIP,
 		ZIPS,
 		RLE,
-		PXR24
+		PXR24,
+		B44,
+		B44A,
+		DWAA,
+		DWAB
 	};
 
 	static const char* compression_to_str(int compression);