CameraStream

A CameraStream is a MediaStream from an attached camera device or webcam.

from ipywebrtc import CameraStream, ImageRecorder

With constraints

You can pass constraints to the camera:

camera = CameraStream(constraints=
                      {'facing_mode': 'user',
                       'audio': False,
                       'video': { 'width': 640, 'height': 480 }
                       })
camera

Front and back camera

Or use the two convenience methods:

• CameraStream.facing_user

• CameraStream.facing_environment

# this is a shorter way to get the user facing camera
front_camera = CameraStream.facing_user(audio=False)
# or the back facing camera
back_camera = CameraStream.facing_environment(audio=False)

back_camera

Record images from the camera

image_recorder = ImageRecorder(stream=camera)
image_recorder

import PIL.Image
import PIL.ImageFilter
import io
im = PIL.Image.open(io.BytesIO(image_recorder.image.value))

---------------------------------------------------------------------------
UnidentifiedImageError                    Traceback (most recent call last)
<ipython-input-1-88478ab353f7> in <module>
      2 import PIL.ImageFilter
      3 import io
----> 4 im = PIL.Image.open(io.BytesIO(image_recorder.image.value))

~/checkouts/readthedocs.org/user_builds/ipywebrtc/conda/latest/lib/python3.6/site-packages/PIL/Image.py in open(fp, mode, formats)
   3022         warnings.warn(message)
   3023     raise UnidentifiedImageError(
-> 3024         "cannot identify image file %r" % (filename if filename else fp)
   3025     )
   3026

UnidentifiedImageError: cannot identify image file <_io.BytesIO object at 0x7fdeb1019620>

im.filter(PIL.ImageFilter.BLUR)

---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
<ipython-input-1-886fedf7a729> in <module>
----> 1 im.filter(PIL.ImageFilter.BLUR)

NameError: name 'im' is not defined

import numpy as np
im_array = np.array(im)
im_array

---------------------------------------------------------------------------
ModuleNotFoundError                       Traceback (most recent call last)
<ipython-input-1-11fff624d0a1> in <module>
----> 1 import numpy as np
      2 im_array = np.array(im)
      3 im_array

ModuleNotFoundError: No module named 'numpy'