Add integration test for WebVTT in MP4.

Change-Id: Ic8cd785d1fefde4004f27cfce346df2b2a8f643e

packager/app/test/packager_test.py

@@ -848,6 +848,14 @@ class PackagerFunctionalTest(PackagerAppTest):
     self.assertPackageSuccess(streams, flags)
     self._CheckTestResults('single-file-webvtt-text')
 
+  def testSegmentedWebVttMp4(self):
+    streams = self._GetStreams(['text'], test_files=['bear-english.vtt'],
+                               output_format='mp4', segmented=True)
+    flags = self._GetFlags(output_hls=True, output_dash=True)
+
+    self.assertPackageSuccess(streams, flags)
+    self._CheckTestResults('segmented-webvtt-mp4')
+
   def testMp4TrailingMoov(self):
     self.assertPackageSuccess(
         self._GetStreams(['audio', 'video'],

packager/app/test/testdata/segmented-webvtt-mp4/output.m3u8

@@ -0,0 +1,6 @@
+#EXTM3U
+## Generated with https://github.com/google/shaka-packager version <tag>-<hash>-<test>
+
+#EXT-X-INDEPENDENT-SEGMENTS
+
+#EXT-X-MEDIA:TYPE=SUBTITLES,URI="stream_0.m3u8",GROUP-ID="default-text-group",NAME="stream_0",AUTOSELECT=YES

packager/app/test/testdata/segmented-webvtt-mp4/output.mpd

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--Generated with https://github.com/google/shaka-packager version <tag>-<hash>-<test>-->
+<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" profiles="urn:mpeg:dash:profile:isoff-live:2011" minBufferTime="PT2S" type="dynamic" publishTime="some_time" availabilityStartTime="some_time" minimumUpdatePeriod="PT5S" timeShiftBufferDepth="PT1800S">
+  <Period id="0" start="PT0S">
+    <AdaptationSet id="0" contentType="text" segmentAlignment="true">
+      <Role schemeIdUri="urn:mpeg:dash:role:2011" value="subtitle"/>
+      <Representation id="0" bandwidth="2056" codecs="wvtt" mimeType="application/mp4">
+        <SegmentTemplate timescale="1000" initialization="bear-english-text-init.mp4" media="bear-english-text-$Number$.m4s" startNumber="1">
+          <SegmentTimeline>
+            <S t="0" d="1000" r="4"/>
+          </SegmentTimeline>
+        </SegmentTemplate>
+      </Representation>
+    </AdaptationSet>
+  </Period>
+</MPD>

packager/app/test/testdata/segmented-webvtt-mp4/stream_0.m3u8

@@ -0,0 +1,17 @@
+#EXTM3U
+#EXT-X-VERSION:6
+## Generated with https://github.com/google/shaka-packager version <tag>-<hash>-<test>
+#EXT-X-TARGETDURATION:1
+#EXT-X-PLAYLIST-TYPE:VOD
+#EXT-X-MAP:URI="bear-english-text-init.mp4"
+#EXTINF:1.000,
+bear-english-text-1.m4s
+#EXTINF:1.000,
+bear-english-text-2.m4s
+#EXTINF:1.000,
+bear-english-text-3.m4s
+#EXTINF:1.000,
+bear-english-text-4.m4s
+#EXTINF:1.000,
+bear-english-text-5.m4s
+#EXT-X-ENDLIST