Solve error: cocould not open required DirectShow codec drvc. dll

When playing rmvb with mplayer, an error will pop up: Error: cocould not open required DirectShow codec drvc. dll, but it does not affect the use, which makes people uncomfortable. My solution is:

First, find the cause of the problem:
# Find/usr/lib-name drvc *
/Usr/lib/codecs/drvc. So

# LDD/usr/lib/codecs/drvc. So
Linux-gate.so.1 => (0x00110000)
Libstdc ++. so.5 => not found
Libc. so.6 =>/lib/libc. so.6 (0x00162000)
/Lib/ld-linux.so.2 (0x008e7000)

It is inferred from this that libstdc ++. so.5 Is Not Installed

Therefore, after installing it to ensure the network is smooth, enter:
Under Ubuntu: sudo apt-Get install libstdc ++ 5
Under fedora: sudo Yum install compat-libstdc ++-33

And after installation:
It also solves
"Gstreamer encountered a regular stream Error"Question