Here is the top output which I gathered:
I noticed that top is showing vlc's cpu usage is > 100%.
Can anybody please justify me why it is showing like this, whether this is a bug in top application or something else.
You are in a multi-core/multi-CPU environment and "top" is working in Irix mode. That means that your process (vlc) is performing a computation that keeps 1.2 CPUs/cores busy. That could mean 100%+20%, 60%+60%, etc.
Press 'I' to switch to Solaris mode. You get the same value divided by the number of cores/CPUs.