It display the error message as

An Error has occurred while encoding.
The most common possible reasons causing error:

If you did not check "DirectShow Decode", you may try to check it on, as you may have
a working ActiveX filter installed on your PC that could read the codecs of your input file.

Your input source file may not be a valid multimedia clip due to a damaged header, corrupted/segmented data or truncated file. Your input file may have unsupported codecs. Verify the structure and hte used codecs of your input file by double clicking it, the Media Analysis Box opens to display its info, codecs, and other internal data.

There was an interruption of the encoding process due to Disk space, SlowPC, RAM drainage, CPU overload or simple user manual interruption.