You can use AImersoft DVD Ripper, it can offer fast convertion speed and excellent output quality, that’s vert easy to use, and it can convert your DVD to almost all popular video and audio formats including MP4, AVI, WMV, MOV, M, RMVB, MPG, MPEG, 3GP, 3GPP, MPG, ASF, FLV, VOB, WMA, M4A, MP3, you can free download it here;
https://www.aimersoft.com/dvd-ripper.html