opencv-python视频处理之录制视频

录制一段视频保存

import cv2
# 创建一个视频窗口
cv2.namedWindow('Video')
# cv2.VideoCapture(0)打开摄像头
video_capture = cv2.VideoCapture(0)
video_writer = cv2.VideoWriter('test.avi',cv2.VideoWriter_fourcc('M', 'J', 'P', 'G'),video_capture.get(cv2.CAP_PROP_FPS),(int(video_capture.get(cv2.CAP_PROP_FRAME_WIDTH)),int(video_capture.get(cv2.CAP_PROP_FRAME_HEIGHT))))
# cv2.VideoWriter 分别传入的参数是路径 格式，帧率，视频尺寸
success,frame = video_capture.read()
# 成功打开摄像头 直到按esc退出保存视频
while success and not cv2.waitKey(1) == 27:
    blur_frame = cv2.GaussianBlur(frame[:,::-1], (3,3),0)
    video_writer.write(blur_frame)
    cv2.imshow("Video", blur_frame)
    success, frame = video_capture.read()
cv2.destroyWindow('Video')
video_capture.release()

if __name__ == '__main__':
    pass

下面是录制带有声音的视频

import wave
from pyaudio import PyAudio,paInt16
from PIL import ImageGrab
import numpy as np
import cv2
from moviepy.editor import *
from moviepy.audio.fx import all
import time

CHUNK = 1024
FORMAT = pyaudio.paInt16
CHANNELS = 2
RATE = 44100
WAVE_OUTPUT_FILENAME = "output.wav"

p = pyaudio.PyAudio()
wf = wave.open(WAVE_OUTPUT_FILENAME, 'wb')
wf.setnchannels(CHANNELS)
wf.setsampwidth(p.get_sample_size(FORMAT))
wf.setframerate(RATE)
audio_record_flag = True
def callback(in_data, frame_count, time_info, status):
    wf.writeframes(in_data)
    if audio_record_flag:
        return (in_data, pyaudio.paContinue)
    else:
        return (in_data, pyaudio.paComplete)
stream = p.open(format=p.get_format_from_width(wf.getsampwidth()),
                channels=wf.getnchannels(),
                rate=wf.getframerate(),
                input=True,
                stream_callback=callback)
image = ImageGrab.grab()#获得当前屏幕
width = image.size[0]
height = image.size[1]
print("width:", width, "height:", height)
print("image mode:",image.mode)
k=np.zeros((width,height),np.uint8)

fourcc = cv2.VideoWriter_fourcc(*'XVID')#编码格式
video = cv2.VideoWriter('test.mp4', fourcc, 9.5, (width, height))
#经实际测试，单线程下最高帧率为10帧/秒，且会变动，因此选择9.5帧/秒
#若设置帧率与实际帧率不一致，会导致视频时间与音频时间不一致

print("video recording!!!!!")
stream.start_stream()
print("audio recording!!!!!")
record_count = 0
while True:
    img_rgb = ImageGrab.grab()
    img_bgr=cv2.cvtColor(np.array(img_rgb), cv2.COLOR_RGB2BGR)#转为opencv的BGR格式
    video.write(img_bgr)
    record_count += 1
    if(record_count > 200):
        break
    print(record_count, time.time())

audio_record_flag = False
while stream.is_active():
    time.sleep(1)

stream.stop_stream()
stream.close()
wf.close()
p.terminate()
print("audio recording done!!!!!")

video.release()
cv2.destroyAllWindows()
print("video recording done!!!!!")

print("video audio merge!!!!!")
audioclip = AudioFileClip("output.wav")
videoclip = VideoFileClip("test.mp4")
videoclip2 = videoclip.set_audio(audioclip)
video = CompositeVideoClip([videoclip2])
video.write_videofile("test2.mp4",codec='mpeg4')
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版权声明：本文为CSDN博主「luke-skyworker」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/zhaoyun_zzz/java/article/details/84341801

本文地址：https://blog.csdn.net/weixin_32759777/article/details/107295877