Added extract_text_and_timestamps method

whispercpp.pyx

@@ -166,4 +166,29 @@ cdef class Whisper:
 			whisper_full_get_segment_text(self.ctx, i).decode() for i in range(n_segments)
 		]
 
+	def extract_text_and_timestamps(self, int res):
+		"""Extracts the text and timestamps from a transcription.
+
+		Args:
+		    res: A result id from transcribe(...)
+
+		Returns:
+		    A list of tuples containing start time, end time and transcribed text.
+		    e.g. [(0, 500, " This is a test.")]
+
+		Raises:
+		    RuntimeError: The given result id was invalid.
+		"""
+		if res != 0:
+			raise RuntimeError
+		cdef int n_segments = whisper_full_n_segments(self.ctx)
+		results = []
+		for i in range(n_segments):
+			results.append((
+				whisper_full_get_segment_t0(self.ctx, i),
+				whisper_full_get_segment_t1(self.ctx, i),
+				whisper_full_get_segment_text(self.ctx, i).decode()
+			))
+		return results
+