Add channels to intelrealsense

lerobot/common/robot_devices/cameras/intelrealsense.py

@@ -168,6 +168,7 @@ class IntelRealSenseCameraConfig:
     width: int | None = None
     height: int | None = None
     color_mode: str = "rgb"
+    channels: int | None = None
     use_depth: bool = False
     force_hardware_reset: bool = True
     rotation: int | None = None
@@ -179,6 +180,8 @@ class IntelRealSenseCameraConfig:
                 f"`color_mode` is expected to be 'rgb' or 'bgr', but {self.color_mode} is provided."
             )
 
+        self.channels = 3
+
         at_least_one_is_not_none = self.fps is not None or self.width is not None or self.height is not None
         at_least_one_is_none = self.fps is None or self.width is None or self.height is None
         if at_least_one_is_not_none and at_least_one_is_none:
@@ -254,6 +257,7 @@ class IntelRealSenseCamera:
         self.fps = config.fps
         self.width = config.width
         self.height = config.height
+        self.channels = config.channels
         self.color_mode = config.color_mode
         self.use_depth = config.use_depth
         self.force_hardware_reset = config.force_hardware_reset