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I've tried to use these code

I've tried to use these code to catch the exif tag data.

void exif_cb(void *context, int tag, int type,
			 int len, unsigned int ord, void *ifp,
			 INT64 base)
	if (tag == (0x004d | 0x30000)) {
		print("get the 0x004d tag");

0x004d is from named "AFPointPosition".

I can get all the tags printed, but no "0x004d" found.

The rw2 raw file i'm using can be extracted a "0x004d" AFPointPosition tag data by the ExifTool downloaded from