Maybe you should try to use another video converter, like as Leawo Video Converter, This tool fully support popular video formats (AVI, MPEG, WMV, MP4, FLV, RM, MOV,
RMVB, 3GP), audio formats (MP3, WMA, WAV, M4A, AAC, AC3) and HD video
formats (AVCHD, MTS/M2TS, MOD/TOD, TRP/TS). You can convert audio/video
files between any two formats seamlessly.
Free download in here:
http://www.leawo.com/leawo-video-converter/