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Play, edit, and convert MP4 videos to MP3, WMA, and OGG files

Imports, manages and writes video files on disks

Cut and convert video files

Video editor with collaborative features

XP Codec Pack is one of the most complete codec packs

Convert to AVI and other formats all your favorite video files in one go

Windows

Windows Mac

LAT

Synpathy

Free

Synpathy is a tool for manual syntactical annotation.

Free

ELAN allows users to add unlimited annotations to audio/video.