Access libcamera::FrameMetaData for status, sequence ID, and timestamp?

[esba1ley]

@kbarni, I'd like to make a feature request... can this library make the libcamera::FrameMetadata accessible in addition to just copying out the image bytes into a cv::Mat ? This could be accomplished by passing in a pointer to a libcamera::FrameMetadata object. This way for each frame, the end user could use the data inside, which is particularly useful:

• frame status (success/error/cancelled/startup)
• frame sequence ID (monotonically increasing integer with each captured frame)
• frame timestamp (monotonically increasing timestamp in nanoseconds)

Some applications need an image time of validity, and this timestamp is the best we can get.

Thanks in advance...