Fix saving lores YUV420 images as JPEG

A plain typo had broken this.

Also extend tests/yuv_capture.py to test this case.

Signed-off-by: David Plowman <[email protected]>

Author: davidplowman

picamera2/request.py

@@ -225,7 +225,7 @@ def save(self, name: str, file_output: Any, format: Optional[str] = None,
         if (config['format'] == 'YUV420' or (self.FASTER_JPEG and config['format'] != "MJPEG")) and \
            self.picam2.helpers._get_format_str(file_output, format) in ('jpg', 'jpeg'):
             quality = self.picam2.options.get("quality", 90)
-            with MappedArray(self, 'main') as m:
+            with MappedArray(self, name) as m:
                 format = self.config[name]["format"]
                 if format == 'YUV420':
                     width, height = self.config[name]['size']

tests/yuv_capture.py

@@ -13,9 +13,13 @@
 time.sleep(5)
 picam2.stop_recording()
 
-still_config = picam2.create_still_configuration({"format": "YUV420"})
+lores = {"size": (640, 480), "format": "YUV420"}
+still_config = picam2.create_still_configuration({"format": "YUV420"}, lores=lores)
 picam2.configure(still_config)
 picam2.start()
 
 time.sleep(2)
 picam2.capture_file("test.jpg")
+
+# Also make sure the lores works - a typo had broken this case
+picam2.capture_file("lores.jpg", "lores")