Convert M2TS to 3GP — Free Online Converter

M2TS (MPEG-2 Transport Stream) is the container format used by Blu-ray discs and AVCHD camcorders, wrapping H.264/AVC or H.265/HEVC video with AC3, DTS, or LPCM audio. Each packet includes an extra 4-byte timestamp for precise synchronization — critical for broadcast and disc-based playback. 3GP is the 3GPP multimedia format designed for GSM mobile networks, optimized for low-bandwidth streaming and feature phone playback. Converting M2TS to 3GP compresses high-quality Blu-ray or camcorder footage into the most compact mobile video format.

M2TS files from Blu-ray discs can be 20-50 GB and from AVCHD camcorders 1-4 GB per hour — far too large for mobile transfer or playback on basic phones. Converting to 3GP dramatically reduces file size (often 50-100x) while producing a format that works on virtually every mobile device, including budget smartphones and feature phones. 3GP is also ideal for MMS (multimedia messaging) where file size limits are as low as 300 KB.