android - Playing video in EXOPlayer -

i using below code play video using exoplayer doesn't plays.

video in mp4 format.where going wrong? showing error-

com.google.android.exoplayer.exoplaybackexception: java.io.ioexception: failed instantiate extractor. 

code-

loadvideo("res:/" + r.raw.samplevider);   private void loadvideo(string path) {     player = exoplayer.factory.newinstance(2, 1000, 5000);     uri uri = uri.parse(path);     samplesource = new frameworksamplesource(getactivity().getapplicationcontext(), uri, null);     // 1. instantiate player.     // 2. construct renderers.     videorenderer = new mediacodecvideotrackrenderer(getactivity().getapplicationcontext(),samplesource, mediacodecselector.default, mediacodec.video_scaling_mode_scale_to_fit_with_cropping);     audiorenderer = new mediacodecaudiotrackrenderer(samplesource,mediacodecselector.default);     // 3. inject renderers through prepare.     player.prepare(videorenderer, audiorenderer);     // 4. pass surface video renderer.     player.sendmessage(videorenderer, mediacodecvideotrackrenderer.msg_set_surface, surfaceview.getholder().getsurface());     // 5. start playback.     player.setplaywhenready(true); } 

try :           private static final int buffer_segment_size = 64 * 1024;         private static final int buffer_segment_count = 256;         private static final int renderer_count = 3;          uri uri = uri.parse(getavideouri());          allocator allocator = new defaultallocator(buffer_segment_size);          datasource datasource = new defaulturidatasource(this, null, getuseragent(this, "exoplayerexample"));          extractorsamplesource samplesource = new extractorsamplesource(                     uri, datasource, allocator, buffer_segment_count * buffer_segment_size);          mediacodecvideotrackrenderer videorenderer = new mediacodecvideotrackrenderer(                     this, samplesource, mediacodecselector.default, mediacodec.video_scaling_mode_scale_to_fit);         mediacodecaudiotrackrenderer audiorenderer = new mediacodecaudiotrackrenderer(                     samplesource, mediacodecselector.default); player = exoplayer.factory.newinstance(renderer_count);              player.prepare(videorenderer, audiorenderer, secondaudiorenderer); player.sendmessage(videorenderer, mediacodecvideotrackrenderer.msg_set_surface, surfaceview.getholder().getsurface()); player.setplaywhenready(true);