diff --git a/README.md b/README.md
index daac94a..20e5e5d 100644
--- a/README.md
+++ b/README.md
@@ -7,54 +7,33 @@ A batch script for convert video to GIF files by FFmpeg.exe on Windows.
 ## Installation
 * Clone the repo
 * Install [FFmpeg](http://ffmpeg.zeranoe.com/builds/) for Windows.
-* Make sure the `ffmpeg.exe` and `video2gif.bat` are on your systems path.
+* Make sure the `ffmpeg.exe` and `gifenc.bat` are on your systems path.
 
 ## Usage
-**Method #1:** Anywhere you can use it by this command in `cmd`:
 ```
-video2gif myvideo.mp4
-```
-Then you have `myvideo.gif` in current directory.
-
-If `myvideo.gif` there is existed, question from you for overwrite it.
-
-**Method #2:** You can just drag and drop `.gif` file on the `video2gif.bat` file.
-
-## Advance Usage
-
-```
-video2gif SOURCE_FILE [OPTIONS]
+gifenc [input_file] [width_in_pixels] [framerate_in_Hz] [palettegen_mode] [Dithering_Algorithm]
 ```
 
 ## Options:
 ```
-  SOURCE_FILE      Source video file name for convert
-                   also you can drag and drop source video file to this batch file directly
-  -o               Output destination .GIF file name
-                   if not set it, use video source file name with new .gif extension
-  -y               Overwrite destination file
-                   if not set it, appears prompt for overwrite destination file
-  -f               Frame per second (fps)
-                   default: 15
-  -w               Width scale of destination gif file
-                   in pixel unit and (-1) for use original width, default: -1
-  -s               Start time of video source for crop
-                   in second or time format (ex. 1:12), if set it, so must be set (-d) param
-  -d               Duration time of video source for crop
-                   in second, if set it, so must be set (-s) param
-  -c               Maximum number of colors to the palette
-                   must be (<=256), default: 256
-  -q               Quality of destination gif file
-                   must be a number between 1(low) to 6(high), default: 5
+Palettegen Modes:
+      1: diff - only what moves affects the palette
+      2: single - one palette per frame
+      3: full - one palette for the whole gif
+-----------------------------------------------------------------------------------------------
+Dithering Options:
+      1: bayer
+      2: heckbert
+      3: floyd steinberg
+      4: sierra2
+      5 sierra2_4a
 ```
 
-## Examples:
+## Example:
 ```
-  video2gif sample.mp4
-  video2gif sample.mp4 -y -w 60 -q 1 -f 10
-  video2gif sample.mp4 -o new_file.gif -y -w 100 -f 10 -s 10 -d 5
-  video2gif sample.mp4 -s 0:30 -d 20 -c 128 -q 6
-  video2gif sample.mp4 -s 1:16.5 -d 8.3
+  gifenc sample.mp4 300 15 1 1
+  gifenc sample.mp4 300 15 2 3
+
 ```
 
 ## Tips