Change format of video files easily by using Video Converter any Format : All Formats To MP4
Use this app and you can:

• Convert avi, flv, mov, mkv, wmv, 3gp, 3gpp, 3gpp2, 3gp2, 3mm, aec, aep, amc, amv, dat, gvi, kmv, m4v, mts, mtv, ts, tvs, vob, webm, wvm, mpeg, ogv, rmvb, wtv, m2ts, m2v , … video files to mp4
• Change quality of video files(2160p, 1080p, 720p, Pal, Ntsc, Vga)
• Trim video files and save it as mp4 file