This is my code：
```
cv::VideoCapture cap;
cap.open(0);
if (!cap.isOpened())
```
The following exception will appear and i tried the way given on the official website
```
Traceback (most recent call last):
File "C:/Program Files/Android/Android Studio/bin/lldb/shared/jobject_printers\jstring_reader.py", line 95, in jstring_summary_provider_23
return Reader(valobj).decode_string(TargetPlatform(23, True))
File "C:/Program Files/Android/Android Studio/bin/lldb/shared/jobject_printers\jstring_reader.py", line 88, in decode_string
data = self._process.ReadMemory(data_address, 2 * length, error)
File "C:\Program Files\Android\Android Studio\bin\lldb\lib\python\lldb\__init__.py", line 8428, in ReadMemory
return _lldb.SBProcess_ReadMemory(self, addr, buf, error)
ValueError: Positive integer expected
```
Anyone can help me？thanks
↧