.MP4V file extension

This is the basic program to work with .MP4V extension

Media Player Classic

Media Player Classic Fichier multimédia

Media Player Classic - Home Cinema is a free audio and video player for Windows. Features: - An option to remove Tearing - MPC Home Cinema in Your Language (see all languages) - Additional video decoders and in particular H.264 and VC-1 with DXVA support... (more)

The program works with the following extensions: avi, flv, ifo, mkv, vob, dat, swf, wmv, mp4, rp, rt, rv, ts, tp, ra, mov, rm, qt, aif, wmp, smi, dsa, pva, dsv, ac3, flh, asf, amr, vp6, dts, m2g, mpc, cel, rnx, m1v, flc, bik, mka, m2v, mps, fli, m2a, ivf, m1a, roq, ogg, mpe, flt, m4a, tpr, ogm, dss, m4b, vp7, mpg, m4p, pss, m4e, m4v, dsm, ram, rpm, flx, 3g2, mpv, drc, rmm, 3gp, vg2, d2v, rmvb, 3gp2, aifc, 3gpp, smil, aiff, divx, mp4v, mp2v, mpeg, mpv2, flic, hdmov, mpcpl and ratdvd