diff --git a/nestris_ocr/calibration/auto_calibrate.py b/nestris_ocr/calibration/auto_calibrate.py
index ed55144..d9d937b 100644
--- a/nestris_ocr/calibration/auto_calibrate.py
+++ b/nestris_ocr/calibration/auto_calibrate.py
@@ -18,9 +18,10 @@ def fix_interlace_resize(rect):
 
 
 def auto_calibrate_raw(config):
+    # todo: ask the capture method for screen size, and capture full screen.
     captureAreas = (
-        (0, 0, 4000, 2000),  # 4k screens fullscreen
-        (0, 0, 1500, 1500),  # reasonably sized screens
+        (0, 0, 2000, 1000),  # 4k screens fullscreen
+        (0, 0, 1000, 1000),  # reasonably sized screens
     )
     capture = uncached_capture()
     interlace_settings = get_mode_res()
diff --git a/nestris_ocr/capturing/deinterlacer.py b/nestris_ocr/capturing/deinterlacer.py
index 0b231c3..f7885b0 100644
--- a/nestris_ocr/capturing/deinterlacer.py
+++ b/nestris_ocr/capturing/deinterlacer.py
@@ -51,6 +51,10 @@ def from_string(cls, value):
 def get_mode_res():
     mode = InterlaceMode.from_string(config["capture.deinterlace_method"])
     res = InterlaceRes.from_string(config["capture.deinterlace_res"])
+    # hack: we should do some business logic elsewhere to disable de-interlacing
+    # on devices that don't support it?
+    if config["capture.method"] != "OPENCV":
+        mode = InterlaceMode.NONE
     return mode, res