diff --git a/doc/FFmpeg_command_line.md b/doc/FFmpeg_command_line.md
index 88c6d73..b1604fb 100644
--- a/doc/FFmpeg_command_line.md
+++ b/doc/FFmpeg_command_line.md
@@ -7,70 +7,70 @@ ffprobe用于检测多媒体流格式；ffplay用于播放视频,包括本地与
# 一、ffmpeg命令行
## 1、命令行参数介绍
Print help / information / capabilities:
---help topic |show help
--version |show version
--formats |show available formats
--muxers |show available muxers
--demuxers |show available demuxers
--devices |show available devices
--codecs |show available codecs
--decoders |show available decoders
--encoders |show available encoders
--bsfs |show available bit stream filters
--protocols |show available protocols
--filters |show available filters
--pix_fmts |show available pixel formats
--sample_fmts |show available audio sample formats
--hwaccels |show available HW acceleration methods
+--help topic$~~~~~~~~$show help
+-version$~~~~~~~~~~~~$show version
+-formats$~~~~~~~~~~~~$show available formats
+-muxers$~~~~~~~~~~~~~$show available muxers
+-demuxers$~~~~~~~~~~~$show available demuxers
+-devices$~~~~~~~~~~~~$show available devices
+-codecs$~~~~~~~~~~~~~$show available codecs
+-decoders$~~~~~~~~~~~$show available decoders
+-encoders$~~~~~~~~~~~$show available encoders
+-bsfs$~~~~~~~~~~~~~~~$show available bit stream filters
+-protocols$~~~~~~~~~~$show available protocols
+-filters$~~~~~~~~~~~~$show available filters
+-pix_fmts$~~~~~~~~~~~$show available pixel formats
+-sample_fmts$~~~~~~~~$show available audio sample formats
+-hwaccels$~~~~~~~~~~~$show available HW acceleration methods
Global options (affect whole program instead of just one file:
--v loglevel |set logging level
--y |overwrite output files
--n |never overwrite output files
--filter_threads |number of non-complex filter threads
--stats |print progress report during encoding
--vol volume |change audio volume (256=normal)
+-v loglevel$~~~~~~~~~$set logging level
+-y$~~~~~~~~~~~~~~~~~~$overwrite output files
+-n$~~~~~~~~~~~~~~~~~~$never overwrite output files
+-filter_threads$~~~~~$number of non-complex filter threads
+-stats$~~~~~~~~~~~~~~$print progress report during encoding
+-vol volume$~~~~~~~~~$change audio volume (256=normal)
Per-file main options:
--f fmt |force format
--c codec |codec name
--codec codec |codec name
--t duration |record or transcode "duration" seconds of audio/video
--to time_stop |record or transcode stop time
--fs limit_size |set the limit file size in bytes
--ss time_off |set the start time offset
--sseof time_off |set the start time offset relative to EOF
--frames number |set the number of frames to output
--filter filter_graph set stream filtergraph
--discard |discard
--disposition |disposition
+-f fmt$~~~~~~~~~~~~~~$force format
+-c codec$~~~~~~~~~~~~$codec name
+-codec codec$~~~~~~~~$codec name
+-t duration$~~~~~~~~~$record or transcode "duration" seconds of audio/video
+-to time_stop$~~~~~~~$record or transcode stop time
+-fs limit_size$~~~~~~$set the limit file size in bytes
+-ss time_off$~~~~~~~~$set the start time offset
+-sseof time_off$~~~~~$set the start time offset relative to EOF
+-frames number$~~~~~~$set the number of frames to output
+-filter filter_graph set stream filtergraph
+-discard$~~~~~~~~~~~~$discard
+-disposition$~~~~~~~~$disposition
Video options:
--vframes number |set the number of video frames to output
--r rate |set frame rate (Hz value, fraction or abbreviation)
--s size |set frame size (WxH or abbreviation)
--aspect aspect |set aspect ratio (4:3, 16:9 or 1.3333, 1.7777)
--vn |disable video
--vcodec codec |force video codec ('copy' to copy stream)
--timecode hh:mm:ss |set initial TimeCode value.
--vf filter_graph |set video filters
--ab bitrate |audio bitrate (please use -b:a)
--b bitrate |video bitrate (please use -b:v)
+-vframes number$~~~~~$set the number of video frames to output
+-r rate$~~~~~~~~~~~~~$set frame rate (Hz value, fraction or abbreviation)
+-s size$~~~~~~~~~~~~~$set frame size (WxH or abbreviation)
+-aspect aspect$~~~~~~$set aspect ratio (4:3, 16:9 or 1.3333, 1.7777)
+-bits_per_raw_sample number set the number of bits per raw sample
+-vn$~~~~~~~~~~~~~~~~~$disable video
+-vcodec codec$~~~~~~~$force video codec ('copy' to copy stream)
+-vf filter_graph$~~~~$set video filters
+-ab bitrate$~~~~~~~~~$audio bitrate (please use -b:a)
+-b bitrate$~~~~~~~~~~$video bitrate (please use -b:v)
Audio options:
--aframes number |set the number of audio frames to output
--aq quality |set audio quality (codec-specific)
--ar rate |set audio sampling rate (in Hz)
--ac channels |set number of audio channels
--an |disable audio
--acodec codec |force audio codec ('copy' to copy stream)
--vol volume |change audio volume (256=normal)
--af filter_graph |set audio filters
+-aframes number$~~~~~$set the number of audio frames to output
+-aq quality$~~~~~~~~~$set audio quality (codec-specific)
+-ar rate$~~~~~~~~~~~~$set audio sampling rate (in Hz)
+-ac channels$~~~~~~~~$set number of audio channels
+-an$~~~~~~~~~~~~~~~~~$disable audio
+-acodec codec$~~~~~~~$force audio codec ('copy' to copy stream)
+-vol volume$~~~~~~~~~$change audio volume (256=normal)
+-af filter_graph$~~~~$set audio filters
Subtitle options:
--s size |set frame size
--sn |disable subtitle
--scodec codec |force subtitle codec ('copy' to copy stream)
+-s size$~~~~~~~~~~~~~$set frame size
+-sn$~~~~~~~~~~~~~~~~~$disable subtitle
+-scodec codec$~~~~~~~$force subtitle codec ('copy' to copy stream)
命令行整体格式：以ffmpeg开头，参数之间用空格隔开，每个参数key以"-"开头，后面跟着参数value，输出文件放在命令行最后。
@@ -189,7 +189,7 @@ ffmpeg -ss 20 -accurate_seek -t 10 -i input.mp4 -an -r 5 %3d.jpg
ffmpeg -i in.mp4 -filter_complex [0:v]setpts=%.2f*PTS[v];[0:a]atempo=%.2f[a] -map [v] -map [a] out.mp4
### 3.12 旋转视频
-ffmpeg -i in.mp4 -c copy -metadata:s:\v:0 rotate=90 out.mp4
+ffmpeg -i in.mp4 -c copy -metadata:s\:v:0 rotate=90 out.mp4
# 二、ffplay命令行
ffplay主要用于播放视频，也可以播放网络流，示例如下：
diff --git a/picture/ffmpeg_group.png b/picture/ffmpeg_group.png
index 91031e3..43fe98f 100644
Binary files a/picture/ffmpeg_group.png and b/picture/ffmpeg_group.png differ