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March 20, 2024 12:44
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撮影高速化試行
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import cv2 | |
import os | |
import time | |
import RPi.GPIO as GPIO | |
import sys | |
from picamera2 import Picamera2 | |
import libcamera | |
import numpy as np | |
timelog = time.time() | |
# raw_width = 640 #2304 | |
# raw_height = 480 #1296 | |
rec_width = 320 | |
rec_height = 240 | |
time_log = [] | |
time_log2 = [] | |
time_log3 = [] | |
frame_list = [] | |
meta_data_list = [] | |
# exposure_time = 5000 # 1000-100000 defo:5000 | |
exposure_time = 1000 # 物理シャッターとの干渉を徹底的に避ける | |
analogue_gain = 16 # 1.0-20.0 defo:2.0 | |
buffers = 1 | |
queue_control = False | |
# Bolex | |
pin_shutter = 25 # shutter timing picup | |
# GPIO設定 | |
GPIO.setmode(GPIO.BCM) | |
GPIO.setup(pin_shutter, GPIO.IN, pull_up_down = GPIO.PUD_UP) | |
number_max_frame = 32 #連続撮影可能な最大フレーム数 とりあえず16FPS x 60sec = 960フレーム | |
record_fps = 16 #MP4へ変換する際のFPS設定値 | |
share_folder_path = os.path.expanduser("~/share/") | |
device_name = "bolex" | |
codec = cv2.VideoWriter_fourcc(*'avc1') | |
camera = Picamera2() | |
# 撮影モードに応じてpicameraのconfigを設定する | |
def set_camera_mode(): | |
global rec_width, rec_height, raw_width, raw_height | |
camera.stop() | |
config = camera.create_still_configuration( | |
main = { | |
"format" : "BGR888", | |
"size" : (rec_width, rec_height) | |
}, | |
# raw = { | |
# "format" : "SBGGR10_CSI2P", | |
# "size" : (raw_width, raw_height) | |
# }, | |
buffer_count = buffers, | |
queue = queue_control, | |
controls = { | |
"ExposureTime" : exposure_time, | |
"AnalogueGain" : analogue_gain, | |
# "FrameDurationLimits" : (100, 100000) | |
"FrameDurationLimits" : (10000, 10000) # 10ms固定にして可変要素を排除する | |
}, | |
# transform = libcamera.Transform(hflip=1, vflip=1) # 切り分けのため、処理をスキップする | |
) | |
camera.configure(config) | |
camera.start() | |
# timerを受けて画像を取得する関数 | |
def shutter(text): | |
global time_log, time_log2, time_log3, frame_list, meta_data_list | |
if len(frame_list) < number_max_frame: | |
time_log.append(time.time()) | |
request = camera.capture_request() | |
time_log2.append(time.time()) | |
frame_list.append(request.make_image("main")) | |
meta_data_list.append(request.get_metadata()) | |
request.release() | |
time_log3.append(time.time()) | |
else: | |
movie_save() | |
# ムービー撮影後、画像を連結してムービーファイルを保存する。 | |
def movie_save(): | |
global recording_completed, frame_list, meta_data_list | |
recording_completed = False | |
print("save movie") | |
movie_file_path = share_folder_path + device_name + ".mp4" | |
video = cv2.VideoWriter(movie_file_path, codec, record_fps, (rec_width, rec_height)) | |
if not video.isOpened(): | |
print("video writer can't be opened") | |
sys.exit() | |
for i in range(len(frame_list)): | |
frame = np.array(frame_list[i]) | |
frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB) | |
video.write(frame) | |
print("movie rec finished") | |
video.release() | |
print_log() | |
def print_log(): | |
global time_log, time_log2, frame_list, meta_data_list | |
print(" frame interval / camera interval // capture request / extract data (msec)" ) | |
for i in range(len(time_log)-1): | |
t1 = (time_log[i + 1] - time_log[i]) * 1000 | |
t2 = (meta_data_list[i + 1]["SensorTimestamp"] - meta_data_list[i]["SensorTimestamp"]) / 1000000 | |
t3 = (time_log2[i] - time_log[i]) * 1000 | |
t4 = (time_log3[i] - time_log2[i]) * 1000 | |
print(f'{t1:16.3f}' + ' / ' + f'{t2:15.3f}' + ' // ' + f'{t3:15.3f}' + ' / ' + f'{t4:12.3f}') | |
time_log = [] | |
time_log2 = [] | |
frame_list = [] | |
meta_data_list = [] | |
# メイン | |
if __name__ == "__main__": | |
set_camera_mode() | |
# シャッター動作検出時のコールバック関数 | |
GPIO.add_event_detect(pin_shutter, GPIO.RISING, callback = shutter, bouncetime = 1) | |
while(True): | |
time.sleep(10) |
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検証用コードを踏まえての専用ハードウェア適用版。