TRTC硬编解码绿屏/黑屏之编码器分辨率支持

//获得音视频的配置器MediaFormat
private static MediaFormat getFormat(String path,boolean isVideo) {
	try {
	     MediaExtractor mediaExtractor = new MediaExtractor();
	     mediaExtractor.setDataSource(path);
	     int trackCount = mediaExtractor.getTrackCount();
	     for (int i = 0; i < trackCount; i++) {
	         MediaFormat trackFormat = mediaExtractor.getTrackFormat(i);
	         if (trackFormat.getString(MediaFormat.KEY_MIME).startsWith(isVideo ? "video/" :"audio/")) {
	             return mediaExtractor.getTrackFormat(i);
	         }
	     }
	 } catch (IOException e) {
	     e.printStackTrace();
	 }
	 return null;
}
//单独获取宽高
MediaFormat newFormat =  getFormat(path,true);
int videoWidth = newFormat.getInteger(MediaFormat.KEY_WIDTH);
int videoHeight = newFormat.getInteger(MediaFormat.KEY_HEIGHT);
//结合编码时获取宽高
MediaFormat newFormat = mMediaCodec.getOutputFormat();
int videoWidth = newFormat.getInteger(MediaFormat.KEY_WIDTH);
int videoHeight = newFormat.getInteger(MediaFormat.KEY_HEIGHT);