Support colon (:) in RTSP timing.

Some RTSP servers use `npt`: notation rather than `npt=`

PiperOrigin-RevId: 439333319

library/rtsp/src/main/java/com/google/android/exoplayer2/source/rtsp/RtspSessionTiming.java

@@ -36,8 +36,9 @@ import java.util.regex.Pattern;
       new RtspSessionTiming(/* startTimeMs= */ 0, /* stopTimeMs= */ C.TIME_UNSET);
 
   // We only support npt=xxx-[xxx], but not npt=-xxx. See RFC2326 Section 3.6.
+  // Supports both npt= and npt: identifier.
   private static final Pattern NPT_RANGE_PATTERN =
-      Pattern.compile("npt=([.\\d]+|now)\\s?-\\s?([.\\d]+)?");
+      Pattern.compile("npt[:=]([.\\d]+|now)\\s?-\\s?([.\\d]+)?");
   private static final String START_TIMING_NTP_FORMAT = "npt=%.3f-";
 
   private static final long LIVE_START_TIME = 0;

library/rtsp/src/test/java/com/google/android/exoplayer2/source/rtsp/RtspSessionTimingTest.java

@@ -55,6 +55,13 @@ public class RtspSessionTimingTest {
   }
 
   @Test
+  public void parseTiming_withRangeTimingAndColonSeparator() throws Exception {
+    RtspSessionTiming sessionTiming = RtspSessionTiming.parseTiming("npt:0.000-32.054");
+    assertThat(sessionTiming.getDurationMs()).isEqualTo(32054);
+    assertThat(sessionTiming.isLive()).isFalse();
+  }
+
+  @Test
   public void parseTiming_withInvalidRangeTiming_throwsIllegalArgumentException() {
     assertThrows(
         IllegalArgumentException.class, () -> RtspSessionTiming.parseTiming("npt=10.000-2.054"));