首先是要装ffmpeg，这个可以在第三方套件库去下载
在套件中心的设置，加上这个来源就有了。http://packages.synocommunity.com
或者你自己去下也行，方案有很多种。
装好以后SSH到群晖，sudo -i切换到root账户。
然后执行一下命令
#备份 VideoStation's ffmpeg
mv -n /var/packages/VideoStation/target/bin/ffmpeg /var/packages/VideoStation/target/bin/ffmpeg.orig
#下载ffmpeg脚本
wget -O - https://gist.githubusercontent.com/BenjaminPoncet/bbef9edc1d0800528813e75c1669e57e/raw/ffmpeg-wrapper > /var/packages/VideoStation/target/bin/ffmpeg
#设置脚本相应权限
chown root:VideoStation /var/packages/VideoStation/target/bin/ffmpeg
chmod 750 /var/packages/VideoStation/target/bin/ffmpeg
chmod u+s /var/packages/VideoStation/target/bin/ffmpeg
# 备份VideoStation's libsynovte.so
cp -n /var/packages/VideoStation/target/lib/libsynovte.so /var/packages/VideoStation/target/lib/libsynovte.so.orig
chown VideoStation:VideoStation /var/packages/VideoStation/target/lib/libsynovte.so.orig
# 为libsynovte.so 添加 DTS, EAC3 and TrueHD支持
sed -i -e 's/eac3/3cae/' -e 's/dts/std/' -e 's/truehd/dheurt/' /var/packages/VideoStation/target/lib/libsynovte.so
#备份CodecPack的ffmpeg41
cp /var/packages/CodecPack/target/bin/ffmpeg41 /var/packages/CodecPack/target/bin/ffmpeg41.bak
#链接ffmpeg解码模块
cp /var/packages/VideoStation/target/bin/ffmpeg /var/packages/CodecPack/target/bin/ffmpeg41然后停用Vedio Station套件，在启动就可以了