Python+opencv+pyaudio實現帶聲音螢幕錄製
阿新 • • 發佈:2020-01-09
基於個人的愛好和現實的需求,決定用Python做一個螢幕錄製的指令碼。因為要看一些加密的視訊,每次都要登入,特別麻煩,遂決定用自己寫的指令碼,將加密視訊的播放過程全程錄製下來,這樣以後看自己的錄播就好了。結合近期自己學習的內容,正好用Python來練練手,鞏固自己的學習效果。
經過多番搜尋,決定採用Python+opencv+pyaudio來實現螢幕錄製。網上搜索到的錄屏,基本都是不帶聲音的,而我要實現的是帶聲音的螢幕錄製。下面就開始一步一步的實現吧。
聲音錄製
import pyaudio import wave import sys CHUNK = 1024 if len(sys.argv) < 2: print("Plays a wave file.\n\nUsage: %s filename.wav" % sys.argv[0]) sys.exit(-1) wf = wave.open(sys.argv[1],'rb') p = pyaudio.PyAudio() stream = p.open(format=p.get_format_from_width(wf.getsampwidth()),channels=wf.getnchannels(),rate=wf.getframerate(),output=True) data = wf.readframes(CHUNK) while data != '': stream.write(data) data = wf.readframes(CHUNK) stream.stop_stream() stream.close() p.terminate()
簡潔回撥函式版音訊錄製
import pyaudio import wave import time import sys CHUNK = 1024 FORMAT = pyaudio.paInt16 CHANNELS = 2 RATE = 44100 RECORD_SECONDS = 10 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) time_count = 0 def callback(in_data,frame_count,time_info,status): wf.writeframes(in_data) if(time_count < 10): return (in_data,pyaudio.paContinue) else: return (in_data,pyaudio.paComplete) stream = p.open(format=p.get_format_from_width(wf.getsampwidth()),input=True,stream_callback=callback) stream.start_stream() print("* recording") while stream.is_active(): time.sleep(1) time_count += 1 stream.stop_stream() stream.close() wf.close() p.terminate() print("* recording done!")
視訊錄製(無聲音)
from PIL import ImageGrab import numpy as np import cv2 image = ImageGrab.grab()#獲得當前螢幕 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')#編碼格式 video = cv2.VideoWriter('test.avi',fourcc,25,(width,height)) #輸出檔案命名為test.mp4,幀率為16,可以自己設定 while True: img_rgb = ImageGrab.grab() img_bgr=cv2.cvtColor(np.array(img_rgb),cv2.COLOR_RGB2BGR)#轉為opencv的BGR格式 video.write(img_bgr) cv2.imshow('imm',img_bgr) if cv2.waitKey(1) & 0xFF == ord('q'): break video.release() cv2.destroyAllWindows()
錄製的音訊與視訊合成為帶聲音的視訊
錄製200幀,帶音訊的MP4視訊,單執行緒
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,status): wf.writeframes(in_data) if audio_record_flag: return (in_data,pyaudio.paComplete) stream = p.open(format=p.get_format_from_width(wf.getsampwidth()),stream_callback=callback) image = ImageGrab.grab()#獲得當前螢幕 width = image.size[0] height = image.size[1] print("width:",np.uint8) fourcc = cv2.VideoWriter_fourcc(*'XVID')#編碼格式 video = cv2.VideoWriter('test.mp4',9.5,height)) #經實際測試,單執行緒下最高幀率為10幀/秒,且會變動,因此選擇9.5幀/秒 #若設定幀率與實際幀率不一致,會導致視訊時間與音訊時間不一致 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)#轉為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')
看來要提高幀率必須使用佇列加多執行緒了,這一步等到以後來新增吧。不過總是覺得用OpenCV來實現視訊錄製,有點怪異,畢竟opencv是用來做影象與視訊分析的,還是走正道認真搗鼓opencv該做的事情吧。
以上這篇Python+opencv+pyaudio實現帶聲音螢幕錄製就是小編分享給大家的全部內容了,希望能給大家一個參考,也希望大家多多支援我們。