I've been busy lately, and part of the reason I've been so busy is clients like to revive long dead projects so they can play them on the latest and greatest outdated video servers at TV stations.
When A client asked for a project that has been planted firmly in the video graveyard several years ago to be converted to "an mpeg two" I eventually got around to it.
Looking around I ran across a transcoder that I hadn't heard of before called Adapter. It's FREE and isn't all that bad for transcoding stuff. Here's the list they provide when they say "Convert anything to anything"
"3g2, 3gp, 4xm, RoQ, ac3, alaw, asf, asf_stream, au, audio_dice, avi, crc, daud, dc1394, s, dv, dv1394, dvd, ea, ffm, film_cpk, flic, flv, gif, h261, h263, h264, idcin, image, image2, image2pipe, imagepipe, ipmovie, m4v, matroska, mjpeg, mmf, mov, mov, mp4, m4a, 3gp, 3g2, mp2, mp3, mp4, mpeg, mpeg1video, mpeg2video, mpegts, mpegvideo, mpjpeg, mulaw, nsv, null, nut, ogg, psp, psxstr, rawvideo, redir, rm, rtp, rtsp, s16be, s16le, s8, sdp, shn, sol, svcd, swf, u16be, u16le, u8, vcd, video4linux, vmd, vob, wav, wc3movie, wsaud, wsvqa, yuv4mpegpipe"
As always, your milage may vary, but it's handy to know about and since it's free it's worth a shot.