序言
我们在观看视频的时候，有时候会出现一些奇怪的马赛克，影响我们的观影体验，那么这些马赛克是如何精确的加上去的呢？
本次我们就来用Python实现对视频自动打码！
准备工作
环境咱们还是使用 Python3.8 和 pycharm2021 即可
实现原理
将视频分为音频和画面；
画面中出现人脸和目标比对，相应人脸进行打码；
处理后的视频添加声音；
模块
手动安装一下 cv2 模块 ，pip install opencv-python 安装
素材工具
我们需要安装一下 ffmpeg 音视频转码工具
代码解析
导入需要使用的模块
import cv2
import face_recognition # 人脸识别库 99.7% cmake dlib face_recognition
import subprocess
将视频转为音频
def video2mp3(file_name):
"""
:param file_name: 视频文件路径
:return:
"""
outfile_name = file_name.split('.')[0] + '.mp3'
cmd = 'ffmpeg -i ' + file_name + ' -f mp3 ' + outfile_name
print(cmd)
subprocess.call(cmd, shell=False)
打码
def mask_video(input_video, output_video, mask_path='mask.jpg'):
"""
:param input_video: 需打码的视频
:param output_video: 打码后的视频
:param mask_path: 打码图片
:return:
"""
# 读取图片
mask = cv2.imread(mask_path)
# 读取视频
cap = cv2.VideoCapture(input_video)
# 视频 fps width height
v_fps = cap.get(5)
v_width = cap.get(3)
v_height = cap.get(4)
# 设置写入视频参数 格式MP4
# 画面大小
size = (int(v_width), int(v_height))
fourcc = cv2.VideoWriter_fourcc('m', 'p', '4', 'v')
# 输出视频
out = cv2.VideoWriter(output_video, fourcc, v_fps, size)
# 已知人脸
known_image = face_recognition.load_image_file('tmr.jpg')
biden_encoding = face_recognition.face_encodings(known_image)[0]
cap = cv2.VideoCapture(input_video)
while (cap.isOpened()):
ret, frame = cap.read()
if ret:
# 检测人脸
# 人脸区域
face_locations = face_recognition.face_locations(frame)
for (top_right_y, top_right_x, left_bottom_y, left_bottom_x) in face_locations:
print((top_right_y, top_right_x, left_bottom_y, left_bottom_x))
unknown_image = frame[top_right_y - 50:left_bottom_y + 50, left_bottom_x - 50:top_right_x + 50]
if face_recognition.face_encodings(unknown_image) != []:
unknown_encoding = face_recognition.face_encodings(unknown_image)[0]
# 对比人脸
results = face_recognition.compare_faces([biden_encoding], unknown_encoding)
# [True]
# 贴图
if results == [True]:
mask = cv2.resize(mask, (top_right_x - left_bottom_x, left_bottom_y - top_right_y))
frame[top_right_y:left_bottom_y, left_bottom_x:top_right_x] = mask
out.write(frame)
else:
break
音频添加到画面
def video_add_mp3(file_name, mp3_file):
"""
:param file_name: 视频画面文件
:param mp3_file: 视频音频文件
:return:
"""
outfile_name = file_name.split('.')[0] + '-f.mp4'
subprocess.call('ffmpeg -i ' + file_name + ' -i ' + mp3_file + ' -strict -2 -f mp4 ' + outfile_name, shell=False)
完整代码
import cv2
import face_recognition # 人脸识别库 99.7% cmake dlib face_recognition
import subprocess
def video2mp3(file_name):
outfile_name = file_name.split('.')[0] + '.mp3'
cmd = 'ffmpeg -i ' + file_name + ' -f mp3 ' + outfile_name
print(cmd)
subprocess.call(cmd, shell=False)
def mask_video(input_video, output_video, mask_path='mask.jpg'):
# 读取图片
mask = cv2.imread(mask_path)
# 读取视频
cap = cv2.VideoCapture(input_video)
# 视频 fps width height
v_fps = cap.get(5)
v_width = cap.get(3)
v_height = cap.get(4)
# 设置写入视频参数 格式MP4
# 画面大小
size = (int(v_width), int(v_height))
fourcc = cv2.VideoWriter_fourcc('m', 'p', '4', 'v')
# 输出视频
out = cv2.VideoWriter(output_video, fourcc, v_fps, size)
# 已知人脸
known_image = face_recognition.load_image_file('tmr.jpg')
biden_encoding = face_recognition.face_encodings(known_image)[0]
cap = cv2.VideoCapture(input_video)
while (cap.isOpened()):
ret, frame = cap.read()
if ret:
# 检测人脸
# 人脸区域
face_locations = face_recognition.face_locations(frame)
for (top_right_y, top_right_x, left_bottom_y, left_bottom_x) in face_locations:
print((top_right_y, top_right_x, left_bottom_y, left_bottom_x))
unknown_image = frame[top_right_y - 50:left_bottom_y + 50, left_bottom_x - 50:top_right_x + 50]
if face_recognition.face_encodings(unknown_image) != []:
unknown_encoding = face_recognition.face_encodings(unknown_image)[0]
# 对比人脸
results = face_recognition.compare_faces([biden_encoding], unknown_encoding)
# [True]
# 贴图
if results == [True]:
mask = cv2.resize(mask, (top_right_x - left_bottom_x, left_bottom_y - top_right_y))
frame[top_right_y:left_bottom_y, left_bottom_x:top_right_x] = mask
out.write(frame)
else:
break
def video_add_mp3(file_name, mp3_file):
outfile_name = file_name.split('.')[0] + '-f.mp4'
subprocess.call('ffmpeg -i ' + file_name + ' -i ' + mp3_file + ' -strict -2 -f mp4 ' + outfile_name, shell=False)
if __name__ == '__main__':
# 1.
video2mp3('cut.mp4')
# 2.
mask_video(input_video='cut.mp4',output_video='output.mp4')
# 3.
video_add_mp3(file_name='output.mp4',mp3_file='cut.mp3')
兄弟们，快去试试吧！
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