fix(docs): 修正下载ffmpeg等可选功能的文档 (#36)

* Fix directory paths and commands in README.md

Updated commands for downloading and installing ffmpeg.

* Fix download URL for tlgrectomp4 package

* Add help command example for tlgrectomp4

Updated README to include help command for tlgrectomp4.

Author: jss-tg

jtt808/README.md

@@ -4,17 +4,15 @@
 # 创建工具文件夹
 mkdir -p /home/docker-compose/opt
 # 进入目录
-cd /home/docker-compose
+cd /home/docker-compose/opt
 # 下载
 wget https://johnvansickle.com/ffmpeg/releases/ffmpeg-release-amd64-static.tar.xz
 # 解压
 tar -xvf ffmpeg-release-amd64-static.tar.xz
-# 进入源目录
-cd ffmpeg-*-amd64-static
-# 复制新目录
-cp ffmpeg ffprobe /home/docker-compose/opt/
+# 复制bin文件
+cp ./ffmpeg-*-amd64-static/ffmpeg ./ffmpeg-*-amd64-static/ffprobe /home/docker-compose/opt/
 # 测试
-ffmpeg -version
+./ffmpeg -version
 ```
 
 ## 通力ifv转mp4工具(现在H264正常, H265前端播放器不支持)
@@ -25,13 +23,13 @@ mkdir -p /home/docker-compose/opt/ifv2mp4
 # 进入目录
 cd /home/docker-compose/opt/ifv2mp4
 # 下载安装程序
-wget https://github.com/TranscodeGroup/docker/releases/download/1.0.2/tlgrectomp4_linux1.0.0.2.tar.gz
+wget https://github.com/TranscodeGroup/docker/releases/download/v1.0.2/tlgrectomp4_linux1.0.0.2.tar.gz
 # 解压
 tar -xzvf tlgrectomp4_linux1.0.0.2.tar.gz
 # 增加路径
 export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/docker-compose/opt/ifv2mp4/release
 # 验证
-/home/docker-compose/opt/ifv2mp4/release/tlgrectomp4 input.ifv output.mp4
+/home/docker-compose/opt/ifv2mp4/release/tlgrectomp4 --help
 ```
 
 ## 确保jtt808的docker服务包含如下配置(当前版本已内置, 旧版手工补齐)