What is MTS? AVCHD Camcorder Video Format Explained
The on-camera AVCHD transport-stream file recorded by HD camcorders.
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What is MTS?
MTS is the filename extension AVCHD camcorders use for their recordings. AVCHD (Advanced Video Coding High Definition) was jointly developed by Sony and Panasonic and was announced in 2006 as a format for recording high-definition video to consumer camcorders.
Technically an MTS file is the same BDAV MPEG-2 transport stream container as M2TS: 188-byte MPEG transport packets carrying H.264/AVC video with Dolby Digital (AC-3) or linear PCM audio. The .mts extension appears on the camera's memory; when the file is imported to a computer or authored to Blu-ray it is commonly renamed to .m2ts.
How MTS Works
An MTS file is the same BDAV MPEG-2 transport stream container as M2TS, built from MPEG transport packets that carry H.264/AVC video together with Dolby Digital (AC-3) or linear PCM audio.[1] The .mts extension is what AVCHD camcorders write to their internal memory or memory cards; the underlying byte structure is identical to the .m2ts files used on Blu-ray.[3]
History of AVCHD
Sony and Panasonic jointly developed AVCHD and announced it in 2006 as a format for recording high-definition video to consumer camcorders using inexpensive media.[2] By adopting H.264/AVC compression, AVCHD delivered HD quality at bitrates that fit on DVDs, hard drives, and flash cards, and the format was later extended to support 1080p and 3D recording.[2]
MTS vs M2TS
The practical distinction is one of context rather than data: .mts denotes the file as it sits on the camera, while importing it to a computer or authoring it to Blu-ray commonly renames it to .m2ts.[3] Both share the BDAV transport-stream structure documented for Blu-ray and AVCHD.[1]
MKV Technical Specifications
MTS vs Other Video Formats
| Feature | MTS | MP4 | MKV |
|---|---|---|---|
| Type | Container[1] | Container | Container |
| Codec(s) | H.264 (AVCHD)[2] | H.264, HEVC, AV1 | Nearly any |
| Container | MPEG-2 transport stream[3] | ISO base media | Matroska |
| Device/browser support | Camcorders, limited web | Universal | Players, limited web |
| Standardized by | AVCHD spec[2] | ISO/IEC | Open community |
| Best for | AVCHD camcorder files | Streaming, sharing | Flexible archiving |
MTS is the AVCHD camcorder form of the transport stream; MP4 and MKV are more convenient for editing and playback.
Advantages & Disadvantages
Advantages
MTS is the standard recording format for AVCHD camcorders, capturing 1080i/1080p footage.
Uses H.264/AVC compression to store HD video at manageable bitrates on flash media.
Supports Dolby Digital and uncompressed LPCM audio tracks.
The transport-stream design tolerates errors and supports reliable playback.
Disadvantages
Many players and editors cannot open MTS directly without conversion.
Files are buried within AVCHD folder structures and named by sequence number.
Sharing online or editing usually requires converting MTS to MP4 or another format.
Common Use Cases
MTS is the working format of consumer and prosumer HD camcorders.
Camcorder recording | FileFormer
Capturing HD video clips directly onto the camera's memory card.
Home video footage | FileFormer
Storing family and event recordings that are later edited or archived.
Import to editing software | FileFormer
Serving as the source files that editors ingest from AVCHD devices.
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Try Video Converter FreeFrequently Asked Questions
Is MTS the same as M2TS?
Yes, they share the AVCHD/BDAV transport stream; .mts is used on the camcorder and .m2ts after import or disc authoring.
What does AVCHD stand for?
Advanced Video Coding High Definition, a format developed by Sony and Panasonic for HD camcorders.
How do I play MTS files?
VLC and similar players handle MTS; for wider support convert it to MP4.
What video codec is inside an MTS file?
H.264/AVC video, with Dolby Digital (AC-3) or LPCM audio.
Why won't my editor open MTS files?
Some software lacks AVCHD support; importing through the camera's utility or transcoding usually resolves it.