ver 2.0

revise the readme.

Author: cainmagi

README.md

@@ -1,4 +1,3 @@
-
 # FFmpeg-Encoder-Decoder-for-Python
 
 *****
@@ -14,9 +13,9 @@
 
 This is a mpegcoder adapted from FFmpeg & Python-c-api.Using it you could get access to processing video easily. Just use it as a common module in python like this.
 
-```python
-  import mpegCoder
-```
+    ```python
+    import mpegCoder
+    ```
 
 Noted that this API need you to install numpy. 
 
@@ -71,86 +70,86 @@ For more instructions, you could tap `help(mpegCoder)`.
 
 ### V2.0 update report:
 
-    1. Revise the bug of the encoder which may cause the stream duration is shorter than the real duration of the video in some not advanced media players.
+1. Revise the bug of the encoder which may cause the stream duration is shorter than the real duration of the video in some not advanced media players.
 
-    2. Improve the structure of the code and remove some unnecessary codes.
+2. Improve the structure of the code and remove some unnecessary codes.
 
-    3. Provide a complete version of client, which could demux the video stream from a server in any network protocol.
+3. Provide a complete version of client, which could demux the video stream from a server in any network protocol.
 
 ### V1.8 update report:
 
-    1. Provide options (widthDst, heightDst) to let MpegDecoder could control the output size manually. To ensure the option is valid, we must use the method `setParameter` before `FFmpegSetup`. Now you could use this options to get a rescaled output directly:
+1. Provide options (widthDst, heightDst) to let MpegDecoder could control the output size manually. To ensure the option is valid, we must use the method `setParameter` before `FFmpegSetup`. Now you could use this options to get a rescaled output directly:
 
-        ```python
-          d = mpegCoder.MpegDecoder() # initialize
-          d.setParameter(widthDst=400, heightDst=300) # noted that these options must be set before 'FFmpegSetup'! 
-          d.FFmpegSetup(b'i.avi') # the original video size would not influence the output
-          print(d) # examine the parameters. You could also get the original video size by 'getParameter'
-          d.ExtractFrame(0, 100) # get 100 frames with 400x300
-        ```
+    ```python
+      d = mpegCoder.MpegDecoder() # initialize
+      d.setParameter(widthDst=400, heightDst=300) # noted that these options must be set before 'FFmpegSetup'! 
+      d.FFmpegSetup(b'i.avi') # the original video size would not influence the output
+      print(d) # examine the parameters. You could also get the original video size by 'getParameter'
+      d.ExtractFrame(0, 100) # get 100 frames with 400x300
+    ```
 
-        In another example, the set optional parameters could be inherited by encoder, too:
+    In another example, the set optional parameters could be inherited by encoder, too:
 
-        ```python
-          d.setParameter(widthDst=400, heightDst=300) # set optional parameters
-          ...
-          e.setParameter(decoder=d) # the width/height would inherit from widthDst/heightDst rather than original width/height of the decoder.
-        ```
+    ```python
+      d.setParameter(widthDst=400, heightDst=300) # set optional parameters
+      ...
+      e.setParameter(decoder=d) # the width/height would inherit from widthDst/heightDst rather than original width/height of the decoder.
+    ```
+
+    Noted that we do not provide `widthDst`/`heightDst` in `getParameter`, because these 2 options are all set by users. There is no need to get them from the video metadata. 
 
-        Noted that we do not provide `widthDst`/`heightDst` in `getParameter`, because these 2 options are all set by users. There is no need to get them from the video metadata. 
-    
-    2. Optimize some realization of Decoder so that its efficiency could be improved.
+2. Optimize some realization of Decoder so that its efficiency could be improved.
 
 ### V1.7-linux update report:
 
-    Thanks to God, we succeed in this work!
+Thanks to God, we succeed in this work!
 
-    A new version is avaliable for Linux. To implement this tool, you need to install some libraries firstly:
+A new version is avaliable for Linux. To implement this tool, you need to install some libraries firstly:
 
-    * python3.5
+* python3.5
 
-    * numpy 1.13
+* numpy 1.13
 
-    If you want, you could install `ffmpeg` on Linux: Here are some instructions
+If you want, you could install `ffmpeg` on Linux: Here are some instructions
 
-    1. Check every pack which ffmpeg needs here: [Dependency of FFmpeg](https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu "Dependency of FFmpeg")
+1. Check every pack which ffmpeg needs here: [Dependency of FFmpeg](https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu "Dependency of FFmpeg")
 
-    2. Use these steps to install ffmpeg instead of provided commands on the above site.
+2. Use these steps to install ffmpeg instead of provided commands on the above site.
 
-    ```Bash
-     $ git clone https://git.ffmpeg.org/ffmpeg.git
-     $ cd ffmpeg
-     $ ./configure --prefix=host --enable-gpl --enable-libx264 --enable-libx265 --enable-shared --disable-static --disable-doc
-     $ make
-     $ make install
-    ```
+```Bash
+ $ git clone https://git.ffmpeg.org/ffmpeg.git
+ $ cd ffmpeg
+ $ ./configure --prefix=host --enable-gpl --enable-libx264 --enable-libx265 --enable-shared --disable-static --disable-doc
+ $ make
+ $ make install
+```
 
 ### V1.7 update report:
 
-    1. Realize the encoder totally.
+1. Realize the encoder totally.
 
-    2. Provide a global option `dumpLevel` to control the log shown in the screen.
+2. Provide a global option `dumpLevel` to control the log shown in the screen.
 
-    3. Fix bugs in initialize functions.
+3. Fix bugs in initialize functions.
 
 ### V1.5 update report:
 
-    1. Provide an incomplete version of encoder, which could encode frames as a video stream that could not be played by player.
+1. Provide an incomplete version of encoder, which could encode frames as a video stream that could not be played by player.
 
 ### V1.4 update report:
 
-    1. Fix a severe bug of the decoder, which causes the memory collapsed if decoding a lot of frames.
+1. Fix a severe bug of the decoder, which causes the memory collapsed if decoding a lot of frames.
 
 ### V1.2 update report:
 
-    1. Use numpy array to replace the native pyList, which improves the speed  significantly.
+1. Use numpy array to replace the native pyList, which improves the speed  significantly.
 
 ### V1.0 update report:
-    1. Provide the decoder which could decode videos in arbitrary formats and arbitrary coding.
+1. Provide the decoder which could decode videos in arbitrary formats and arbitrary coding.
 
 ## Version of currently used FFmpeg library
-    * libavcodec.so.58.6.103
-    * libavformat.so.58.3.100
-    * libavutil.so.56.5.100
-    * libswresample.so.3.0.101
-    * libswscale.so.5.0.101
+* libavcodec.so.58.6.103
+* libavformat.so.58.3.100
+* libavutil.so.56.5.100
+* libswresample.so.3.0.101
+* libswscale.so.5.0.101