- [*] update doc and add manpage

Author: suntong

README.e.md

@@ -44,6 +44,12 @@ Please check them out in the [wiki](https://github.com/suntong/ffcvt/wiki/).
 
 ## Download/Install
 
+### Using `apt`
+
+The `ffcvt` is now officially in Debian repository, so the installation is now as simple as a `apt install`/`apt-get install`:
+
+    apt install ffcvt
+
 ### Download binaries
 
 - The latest binary executables are available under  

README.md

@@ -14,6 +14,7 @@
 - [Environment Variables](#environment-variables)
 - [Encoding Help](#encoding-help)
 - [Download/Install](#downloadinstall)
+  - [Using `apt`](#using-`apt`)
   - [Download binaries](#download-binaries)
   - [Debian package](#debian-package)
   - [Install Source](#install-source)
@@ -75,6 +76,7 @@ Flags:
   -force	overwrite any existing none-empty file (FFCVT_FORCE)
   -debug	debugging level (FFCVT_DEBUG)
   -ffmpeg	ffmpeg program executable name (FFCVT_FFMPEG)
+  -version	print version then exit (FFCVT_VERSION)
 
 Details:
 
@@ -123,6 +125,8 @@ Details:
     	copy video codec
   -vea string
     	video encoding method append
+  -version
+    	print version then exit
   -ves string
     	video encoding method set
   -vn
@@ -156,6 +160,12 @@ Please check them out in the [wiki](https://github.com/suntong/ffcvt/wiki/).
 
 ## Download/Install
 
+### Using `apt`
+
+The `ffcvt` is now officially in Debian repository, so the installation is now as simple as a `apt install`/`apt-get install`:
+
+    apt install ffcvt
+
 ### Download binaries
 
 - The latest binary executables are available under  

ffcvt.1.ronn

@@ -0,0 +1,41 @@
+# ffcvt -- ffmpeg convert wrapper tool
+
+## SYNOPSIS
+
+   ffcvt [flags] [video_filename]
+
+
+## OPTIONS
+
+For `flags`, run `ffcvt` without parameters to see the comprehensive list and explanation. 
+
+
+## DESCRIPTION
+
+Command `ffcvt` is an easy to use video converter that takes the burden of such daunting task from normal Joe, to harness the fantastic high efficiency audio/video codec/encoding capability long been available in `ffmpeg`, by simplifying the convoluted `ffmpeg` command line parameters.
+
+To encode a video, all you need to do is to give one parameter to `ffcvt`, i.e., the path and file name of the video to be encoded, and `ffcvt` will take care of the rest, using the recommended values for both audio/video encoding to properly encode it for you.
+
+It can't be more simpler than that. However, beneath the simple surface, `ffcvt` is versatile and powerful enough to allow you to touch every corner of audio/video encoding. There is a huge list of environment variables (or command-line parameters) which will allow you tweak the encoding methods and parameters to exactly what you prefer instead.
+
+Moreover, to encode a directory full of video files, including under its sub-directories, you need just to give `ffcvt` one single parameter, the directory location, and `ffcvt` will go ahead and encode all video files under that directory, including all its sub-directories as well. 
+
+
+## EXAMPLES
+
+`ffcvt` comes with comprehensive online documents. For further details,
+please go to:
+
+https://github.com/suntong/ffcvt#encoding-help
+
+https://github.com/suntong/ffcvt/wiki
+
+
+## SEE ALSO
+
+`ffmpeg(1)`
+
+
+## AUTHORS
+
+Tong Sun <suntong@cpan.org>

ffcvt.go

@@ -41,7 +41,7 @@ const _encodedExt = "_.mkv"
 
 var (
 	version = "1.3.3"
-	date    = "2019-04-09"
+	date    = "2019-04-19"
 
 	sprintf           = fmt.Sprintf
 	encodedExt string = _encodedExt