Convert MTS to iPhone Video — Free Online Converter

iPhone's hardware video pipeline is optimized for H.264 (all models) and H.265 (iPhone 7+) in MP4/MOV containers. MTS/AVCHD files from camcorders use an MPEG-2 Transport Stream container with interlaced 1080i video and AC3 audio — a combination that iPhone cannot play natively. iPhone Video conversion deinterlaces, transcodes, and repackages camcorder footage for iPhone's specific hardware and display characteristics.

The iPhone cannot open .mts files in its native Files, Photos, or TV app. Even VLC on iPhone handles MTS via software decoding, which causes battery drain and thermal throttling. AVCHD's 1080i interlaced video also produces visible combing artifacts on iPhone's progressive OLED or LCD display.

Converting to iPhone Video creates a file that iPhone's dedicated video decode chip processes with minimal power consumption. The MP4 container integrates with AirDrop, iMessage video sharing, the Photos library, and iCloud sync. The conversion also optimizes bitrate for iPhone's screen size — the phone's 6.1-6.7 inch display does not benefit from AVCHD's 24 Mbps bitrate.