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110 lines
4.1 KiB
110 lines
4.1 KiB
from datetime import datetime, date, time, timedelta
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import os
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import cv2
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from wakepy import keep
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def five_minute_segment_from(the_time):
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# this is mocked out too be a one minute segment instead
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return the_time.replace(second=0, microsecond=0)
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#return the_time.replace(minute=(the_time.minute // 1)*1, second=0, microsecond=0)
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def path_to_video_at(time_stamp):
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return 'videos/' + str(time_stamp) + '.mkv' # mkv required for h264 encoding
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os.environ["OPENCV_FFMPEG_CAPTURE_OPTIONS"]="hwaccel;vaapi;hw_decoders_any;vaapi,vdpau" # maybe this enables hardware accelerated ffmpeg?
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#delay for long delay
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long_delay = timedelta(minutes=1)
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last_time_stamp = five_minute_segment_from(datetime.now())
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# live webcam feed
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camera = cv2.VideoCapture(0, cv2.CAP_FFMPEG)
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if not camera.isOpened():
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print("Cannot open camera")
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exit()
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# video writer
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fourcc = cv2.VideoWriter_fourcc(*'H264')
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video_writer = cv2.VideoWriter(path_to_video_at(last_time_stamp),
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fourcc,
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camera.get(cv2.CAP_PROP_FPS),
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(int(camera.get(3)),int(camera.get(4))),
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(cv2.VIDEOWRITER_PROP_HW_ACCELERATION, cv2.VIDEO_ACCELERATION_ANY)
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)
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# video feed from previously captured video
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old_time = cv2.VideoCapture(path_to_video_at(last_time_stamp), cv2.CAP_FFMPEG)
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# fullscreen window yess good
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cv2.namedWindow("mirror", cv2.WINDOW_NORMAL)
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cv2.setWindowProperty("mirror", cv2.WND_PROP_FULLSCREEN, cv2.WINDOW_FULLSCREEN)
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queue = [(False, None)] * 100 #queue of recent frames
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idx = 0 # current index into the frame queue
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short_term_delay_frames = 20 # hoow many frames back are we going in the buffer when we're on a short term delay?
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longterm = False # are we shoowing a long term delay? (versus a sshort term delay)
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with keep.presenting():
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while(True):
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if last_time_stamp != five_minute_segment_from(datetime.now()):
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# find file older than our long delay
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old_file = path_to_video_at(five_minute_segment_from(datetime.now() - long_delay - timedelta(minutes=1)))
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if os.path.isfile(old_file):
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print(f"deleting old file {old_file}")
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os.remove(old_file)
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video_writer.release()
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newly_recording_file = path_to_video_at(five_minute_segment_from(datetime.now()))
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print(f"opening {newly_recording_file} too record this upcoming ssegment to")
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video_writer = cv2.VideoWriter(newly_recording_file,
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fourcc,
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camera.get(cv2.CAP_PROP_FPS),
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(int(camera.get(3)), int(camera.get(4))),
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(cv2.VIDEOWRITER_PROP_HW_ACCELERATION, cv2.VIDEO_ACCELERATION_ANY)
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)
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if old_time.isOpened():
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old_time.release()
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new_file = path_to_video_at(five_minute_segment_from(datetime.now() - long_delay))
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print(f"opening the previously recorded file {new_file} to read from for long mirror")
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old_time = cv2.VideoCapture(new_file, cv2.CAP_FFMPEG)
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last_time_stamp = five_minute_segment_from(datetime.now())
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ret, frame = camera.read()
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frame = cv2.flip(frame, 1)
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# record the frame to the appropriate file, and also to the short term buffer
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video_writer.write(frame)
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queue[idx] = ret, frame
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prev_frame_valid, prev_frame = queue[(idx - short_term_delay_frames) % len(queue)]
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old_frame_valid, old_frame = old_time.read()
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if not longterm and prev_frame_valid:
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cv2.imshow('mirror', prev_frame)
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elif longterm and old_frame_valid:
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cv2.imshow('mirror', old_frame)
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key = cv2.waitKey(16) # listen for keyprress for 16 ms
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if key & 0xFF == ord('q') or key == 27: # q or esc
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break
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if key & 0xFF == ord('a'):
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short_term_delay_frames += 1
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if key & 0xFF == ord('d'):
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short_term_delay_frames -= 1
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if key & 0xFF == ord('z'):
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longterm = not longterm
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idx = (idx + 1) % len(queue)
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# After the loop release the cap object
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camera.release()
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out.release()
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# Destroy all the windows
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cv2.destroyAllWindows()
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