import io
from PIL import Image
import select
import v4l2capture
from base_camera import BaseCamera
class Camera(BaseCamera):
"""Requires python-v4l2capture module: https://github.com/gebart/python-v4l2capture"""
video_source = "/dev/video0"
@staticmethod
def frames():
video = v4l2capture.Video_device(Camera.video_source)
# Suggest an image size. The device may choose and return another if unsupported
size_x = 640
size_y = 480
size_x, size_y = video.set_format(size_x, size_y)
video.create_buffers(1)
video.queue_all_buffers()
video.start()
bio = io.BytesIO()
try:
while True:
select.select((video,), (), ()) # Wait for the device to fill the buffer.
image_data = video.read_and_queue()
image = Image.frombytes("RGB", (size_x, size_y), image_data)
image.save(bio, format="jpeg")
yield bio.getvalue()
bio.seek(0)
bio.truncate()
finally:
video.close()
