Custom Color Stream not working

Required Info
Camera Model	ZR300
Firmware Version
Operating System & Version	Ubuntu 16.04 LTS

Given the following MWE if I try to start a color Stream I get the following error:

INFO:pyrealsense.core:There are 1 connected RealSense devices.
INFO:pyrealsense.core:Using device 0, an Intel RealSense ZR300
INFO:pyrealsense.core:    Serial number: 3511803250
INFO:pyrealsense.core:    Firmware version: 2.0.71.28
ERROR:pyrealsense.utils:rs_error was raised when calling rs_get_frame_data(device:0xf1ca90, stream:COLOR)
ERROR:pyrealsense.utils:    streaming not started!
Traceback (most recent call last):
  File "custom_stream.py", line 42, in <module>
    a = dev.irl
  File "build/bdist.linux-x86_64/egg/pyrealsense/core.py", line 518, in <lambda>
  File "build/bdist.linux-x86_64/egg/pyrealsense/core.py", line 514, in get_stream_data
  File "build/bdist.linux-x86_64/egg/pyrealsense/utils.py", line 46, in _check_error
pyrealsense.utils.RealsenseError: rs_get_frame_data(device:0xf1ca90, stream:COLOR) crashed with: streaming not started!

MWE:

import logging
logging.basicConfig(level=logging.INFO)

import ctypes
import time
import numpy as np
import cv2
import pyrealsense as pyrs
from pyrealsense.constants import rs_option

class IRStreamR(pyrs.stream.Stream):
    def __init__(self, name='irl',
                 native=True,
                 #stream=pyrs.constants.rs_stream.RS_STREAM_INFRARED,
                 stream=pyrs.constants.rs_stream.RS_STREAM_COLOR,
                 width=640,
                 height=480,
                 format=pyrs.constants.rs_format.RS_FORMAT_Y8,
                 fps=30):
        super(IRStreamR, self).__init__(name, native, stream, width, height, format, fps)
        self.shape = (height, width, 1)
        self.dtype = ctypes.c_uint8

with pyrs.Service() as serv:
    with serv.Device(streams=(IRStreamR(),
                              )) as dev:

        dev.apply_ivcam_preset(0)

        try:  # set auto exposure to obtain good depth image
            custom_options = [(rs_option.RS_OPTION_R200_LR_AUTO_EXPOSURE_ENABLED, True),
                              (rs_option.RS_OPTION_COLOR_ENABLE_AUTO_EXPOSURE, True),
                             ]
            dev.set_device_options(*zip(*custom_options))
        except pyrs.RealsenseError:
            pass  # options are not available on all devices

        while True:

            dev.wait_for_frames()
            a = dev.irl
            a = cv2.cvtColor(a, cv2.COLOR_GRAY2BGR)

            cv2.imshow('', a)
            if cv2.waitKey(1) & 0xFF == ord('q'):
                break

If you instead use the line #stream=pyrs.constants.rs_stream.RS_STREAM_INFRARED, it works just fine.

The Idea is to get a Camera stream with a 1920 x 1080 resolution which I am trying to achieve by a custom stream.

Any hints or alternatives welcome

toinsson / pyrealsense

Custom Color Stream not working #70