Set preview resolution as 640x360

Signed-off-by: Leo Ma <begeekmyfriend@gmail.com>

app/src/main/java/net/ossrs/yasea/demo/MainActivity.java

@@ -71,7 +71,7 @@ public class MainActivity extends AppCompatActivity implements RtmpHandler.RtmpL
         mPublisher.setEncodeHandler(new SrsEncodeHandler(this));
         mPublisher.setRtmpHandler(new RtmpHandler(this));
         mPublisher.setRecordHandler(new SrsRecordHandler(this));
-        mPublisher.setPreviewResolution(640, 480);
+        mPublisher.setPreviewResolution(640, 360);
         mPublisher.setOutputResolution(720, 1280);
         mPublisher.setVideoHDMode();
         mPublisher.startCamera();

library/src/main/java/net/ossrs/yasea/SrsEncoder.java

@@ -24,7 +24,7 @@ public class SrsEncoder {
     public static final String ACODEC = "audio/mp4a-latm";
     public static String x264Preset = "veryfast";
     public static int vPrevWidth = 640;
-    public static int vPrevHeight = 480;
+    public static int vPrevHeight = 360;
     public static int vPortraitWidth = 720;
     public static int vPortraitHeight = 1280;
     public static int vLandscapeWidth = 1280;