media: add backwards-compat, revert tests

pkg/media/concat2_test.go

···
 	<-padIdleCh
 	<-padIdleCh
 
-	require.Equal(t, 1562835, videoBuf.Len(), fmt.Sprintf("uuid: %s", uuidStr))
-	require.Equal(t, 750, audioBuf.Len(), fmt.Sprintf("uuid: %s", uuidStr))
+	require.Equal(t, 4936455, videoBuf.Len(), fmt.Sprintf("uuid: %s", uuidStr))
+	require.Equal(t, 32200, audioBuf.Len(), fmt.Sprintf("uuid: %s", uuidStr))
 
 	return <-errCh
 }

pkg/media/concat_demux_test.go

···
 		if err != nil {
 			t.Errorf("failed to set pipeline to null state: %v", err)
 		}
-		require.Equal(t, 312567, videoBuf.Len())
-		require.Equal(t, 150, audioBuf.Len())
+		require.Equal(t, 987291, videoBuf.Len())
+		require.Equal(t, 6440, audioBuf.Len())
 	}()
 
 	return <-errCh

pkg/media/media.go

···
 			ass = &a
 			break
 		}
+		if a.Label == "place.stream.metadata" {
+			// backwards compatibility for old manifests
+			ass = &a
+			break
+		}
 	}
 	if ass == nil {
 		return nil, ErrMissingMetadata

pkg/media/packetize_test.go

···
 	packet, err := Packetize(context.Background(), testSeg)
 	require.NoError(t, err)
 	require.NotNil(t, packet)
-	require.Equal(t, 60, len(packet.Video))
-	require.Equal(t, 50, len(packet.Audio))
-	require.Equal(t, time.Duration(1000*time.Millisecond), packet.Duration)
+	require.Equal(t, 49, len(packet.Video))
+	require.Equal(t, 40, len(packet.Audio))
+	require.Equal(t, time.Duration(800*time.Millisecond), packet.Duration)
 }
 
 func TestPacketizeInvalid(t *testing.T) {

pkg/media/segment_roundtrip_test.go

···
 	}{
 		{
 			name:    "OneMinute",
-			fixture: remote.RemoteArchive("23ad0f876dd7913f6ec96e5460a75e23aa6fb74c7e92811cdc5a2c07c233f331/1-minute-of-signed-segments-v2.tar.gz"),
+			fixture: remote.RemoteArchive("4563c7b48c0ca02c3fc87bbe6f1e63a743656e465a82bec0af75ef7eead04a23/1-minute-of-signed-segments.tar.gz"),
 		},
 		{
 			name:    "ThreeSegs",
-			fixture: remote.RemoteArchive("b533da03e79933c12bc6e1070cad1b560fa9734afa69b2202a908fc382627b6b/threesegs-v2.tar.gz"),
+			fixture: remote.RemoteArchive("c21e9352e72ca0729c66af2fcabec1b8997b509601241e8d38d5728f9687386b/threesegs.tar.gz"),
 		},
 	}
 	for _, testCase := range testCases {