ffmpeg: error while loading shared libraries: libavdevice.so.55: cannot open shared object file: No

ffmpeg正常安裝後執行ffmpeg時出現如下錯誤：

ffmpeg: error while loading shared libraries: libavdevice.so.53: cannot open shared object file: No such file or directory

解決辦法：

vi /etc/ld.so.conf

#原文加入：/usr/local/lib

加入自己編譯ffmpeg的路徑/lib

執行ldconfig