GPT答：

7i24.cn

This code snippet checks if the `transtream` flag is true. If it is, it opens a video capture object using the `new_source` parameter of the `grabImage` class. If the video capture object fails to open, an error message is printed and the loop continues. Finally, the `transtream` flag is set to false.

Note: This code assumes that there are other parts of the program that handle frame processing and display.