NdkMediaExtractor: per-sample format metadata API

Bug: 63934228
Test: MediaPlayer2Test
Change-Id: I8ac081ba91152b1bb2e7bb61bf6977f90bcb8e3c
diff --git a/media/libmediaplayerservice/nuplayer/NuPlayer.cpp b/media/libmediaplayerservice/nuplayer/NuPlayer.cpp
index dce3e0a..bd83c6d 100644
--- a/media/libmediaplayerservice/nuplayer/NuPlayer.cpp
+++ b/media/libmediaplayerservice/nuplayer/NuPlayer.cpp
@@ -2702,7 +2702,7 @@
 void NuPlayer::sendSubtitleData(const sp<ABuffer> &buffer, int32_t baseIndex) {
     int32_t trackIndex;
     int64_t timeUs, durationUs;
-    CHECK(buffer->meta()->findInt32("trackIndex", &trackIndex));
+    CHECK(buffer->meta()->findInt32("track-index", &trackIndex));
     CHECK(buffer->meta()->findInt64("timeUs", &timeUs));
     CHECK(buffer->meta()->findInt64("durationUs", &durationUs));