使用Python写出视频最低有效位隐写脚本
时间: 2023-08-06 10:02:37 浏览: 223
当然!以下是一个使用Python编写的视频最低有效位(LSB)隐写脚本的示例:
```python
import cv2
def encode_text_into_video(video_path, text):
video = cv2.VideoCapture(video_path)
frames = int(video.get(cv2.CAP_PROP_FRAME_COUNT))
text += "\0" # 添加结束标志,以8个0表示
for i in range(len(text)):
ret, frame = video.read()
if not ret:
break
pixel = frame[0, 0] # 仅修改首个像素点的LSB
# 将字符转换为8位二进制
char_binary = bin(ord(text[i]))[2:].zfill(8)
# 替换像素点的最低有效位
modified_pixel = list(pixel)
modified_pixel[-1] = int(char_binary[-1])
modified_pixel = tuple(modified_pixel)
frame[0, 0] = modified_pixel
video.set(cv2.CAP_PROP_POS_FRAMES, i)
video.write(frame)
video.release()
def extract_text_from_video(video_path):
video = cv2.VideoCapture(video_path)
frames = int(video.get(cv2.CAP_PROP_FRAME_COUNT))
extracted_text = ""
current_bit = ""
bit_count = 0
for _ in range(frames):
ret, frame = video.read()
if not ret:
break
pixel = frame[0, 0] # 仅提取首个像素点的LSB
# 提取像素点的最低有效位
lsb = bin(pixel[-1])[-1]
current_bit += lsb
bit_count += 1
if bit_count == 8: # 当累计8个比特位时,转换为一个字符
if current_bit == "00000000": # 结束标志为8个0
break
extracted_text += chr(int(current_bit, 2))
current_bit = ""
bit_count = 0
video.release()
return extracted_text
# 使用示例
video_file = "original_video.avi" # 原始视频文件路径
hidden_text = "This is a hidden message!" # 要隐藏的文本
# 隐写加密
encode_text_into_video(video_file, hidden_text)
print("隐藏文本已嵌入视频!")
# 隐写解密
extracted_text = extract_text_from_video(video_file)
print("提取的隐藏文本:", extracted_text)
```
请确保你已经安装了OpenCV库(可以通过`pip install opencv-python`进行安装)。此脚本将指定的文本隐藏在视频的LSB中,并从视频中提取隐藏的文本。
需要注意的是,这只是一个简单的LSB隐写示例,并且假设隐藏文本以ASCII字符形式嵌入视频的LSB中。实际应用中,可能需要更复杂的算法来加密和解密不同类型的隐写信息。
阅读全文