Recently I make free trial of some pretty good mac video converters which work with high efficiency and quality.
Mac Video Convertercan convert between all video formats such as MPEG, MP4, H.264, SWF, FLV, VOB, MOD, M4V, AVI, WMV, 3GP, 3GPP, MOV, DivX, XviD, MOV, DV, MJPG, MJPEG, MPV, etc, as well as HD video TS, MTS, M2TS. As the Mac Total Video Converter, it can also convert between audio formats such as MP3, MP2, AAC, AC3, WAV, WMA, M4A, RAM, OGG, AU, AIF, AIFF, APE, FLAC, NUT and extract audio from video files.
iPod Video Converter for Maccan convert all popular video formats like MPG, MPEG, MPEG2, MTS, M2TS, TS, VOB, MP4, M4V, RM, RMVB, WMV, ASF, etc to MP4, H.264/MPEG-4 AVC(.mp4), MOV format for all iPod versions. It can also convert any audio formats and exact audio from video to iPod MP3, M4A music.
iPhone Video Converter for Maccan convert MPG, MPEG, MPEG2, MTS, M2TS, TS, VOB, MP4, M4V, RM, RMVB, WMV, ASF, etc to iPhone video MP4, H.264/MPEG-4 AVC(.mp4), MOV for you to enjoy on iPhone. This Mac iPhone Movie Converter can also convert MP3, MP2, AAC, AC3, WAV to iPhone MP3, M4A audio and extract audio from video file, then convert to MP3, M4A.