Support for video file instead of camera and output video out to file

webrtc/api/BUILD.gn

 # Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 import("../build/webrtc.gni")
 if (is_android) {
@@ skipping 244 matching lines @@
       "android/java/src/org/webrtc/CameraCapturer.java",
       "android/java/src/org/webrtc/CameraEnumerationAndroid.java",
       "android/java/src/org/webrtc/CameraEnumerator.java",
       "android/java/src/org/webrtc/CameraSession.java",
       "android/java/src/org/webrtc/CameraVideoCapturer.java",
       "android/java/src/org/webrtc/DataChannel.java",
       "android/java/src/org/webrtc/EglBase.java",
       "android/java/src/org/webrtc/EglBase10.java",
       "android/java/src/org/webrtc/EglBase14.java",
       "android/java/src/org/webrtc/EglRenderer.java",
+      "android/java/src/org/webrtc/FileVideoCapturer.java",
       "android/java/src/org/webrtc/GlRectDrawer.java",
       "android/java/src/org/webrtc/GlShader.java",
       "android/java/src/org/webrtc/GlTextureFrameBuffer.java",
       "android/java/src/org/webrtc/GlUtil.java",
       "android/java/src/org/webrtc/IceCandidate.java",
       "android/java/src/org/webrtc/MediaCodecVideoDecoder.java",
       "android/java/src/org/webrtc/MediaCodecVideoEncoder.java",
       "android/java/src/org/webrtc/MediaConstraints.java",
       "android/java/src/org/webrtc/MediaSource.java",
       "android/java/src/org/webrtc/MediaStream.java",
       "android/java/src/org/webrtc/MediaStreamTrack.java",
       "android/java/src/org/webrtc/Metrics.java",
       "android/java/src/org/webrtc/NetworkMonitor.java",
       "android/java/src/org/webrtc/NetworkMonitorAutoDetect.java",
       "android/java/src/org/webrtc/PeerConnection.java",
       "android/java/src/org/webrtc/PeerConnectionFactory.java",
       "android/java/src/org/webrtc/RendererCommon.java",
       "android/java/src/org/webrtc/RtpParameters.java",
       "android/java/src/org/webrtc/RtpReceiver.java",
       "android/java/src/org/webrtc/RtpSender.java",
       "android/java/src/org/webrtc/SdpObserver.java",
       "android/java/src/org/webrtc/SessionDescription.java",
       "android/java/src/org/webrtc/StatsObserver.java",
       "android/java/src/org/webrtc/StatsReport.java",
       "android/java/src/org/webrtc/SurfaceTextureHelper.java",
       "android/java/src/org/webrtc/SurfaceViewRenderer.java",
       "android/java/src/org/webrtc/VideoCapturer.java",
       "android/java/src/org/webrtc/VideoCapturerAndroid.java",
+      "android/java/src/org/webrtc/VideoFileRenderer.java",
       "android/java/src/org/webrtc/VideoRenderer.java",
       "android/java/src/org/webrtc/VideoRendererGui.java",
       "android/java/src/org/webrtc/VideoSource.java",
       "android/java/src/org/webrtc/VideoTrack.java",
     ]
 
     deps = [
       "//webrtc/base:base_java",
     ]
   }
@@ skipping 162 matching lines @@
 
       shared_libraries = [ ":libjingle_peerconnection_so" ]
     }
 
     android_resources("libjingle_peerconnection_android_unittest_resources") {
       resource_dirs = [ "androidtests/res" ]
       custom_package = "org.webrtc"
     }
   }
 }