Free online MTS to MJPG converter

MTS files from AVCHD cameras are not accepted by some older editors, surveillance systems, or video-analysis tools that require Motion JPEG. Converting them produces individually compressed JPEG video frames, usually at the cost of larger files and discarded audio.

What the MTS format is

MTS is a transport-stream container used mainly by AVCHD camcorders and Blu-ray-compatible recording workflows. It commonly contains H.264/AVC video with AC-3 or LPCM audio, typically using the .mts or .m2ts extension. Sony, Panasonic, Canon, and other HD camcorders create MTS recordings; media players and editors such as VLC, DaVinci Resolve, and Adobe Premiere Pro can usually open them.

What the MJPG format is

MJPG, or Motion JPEG, stores video as a sequence of independent JPEG-compressed frames. Each frame can be decoded without processing neighboring frames, which suits frame-by-frame editing, machine-vision software, older capture systems, and some video-analysis applications.

MJPG is less compression-efficient than H.264, so an equivalent-resolution file is often much larger. The term can describe the codec inside an AVI container or a raw Motion JPEG stream; check the receiving program before choosing the output container.

How to actually convert MTS to MJPG

For a conversion without installing software, use the converter on 101convert.com: select the MTS file, choose MJPG as the output format, start the conversion, and download the result. The service is free and does not require a desktop installation.

For local conversion and precise control, FFmpeg can encode an MTS file as MJPEG in an AVI container:

ffmpeg -i input.mts -map 0:v:0 -c:v mjpeg -q:v 3 -an output.avi

Replace input.mts with the source filename. The -q:v 3 setting gives high JPEG quality; values around 2–5 are generally suitable, while higher values reduce quality and file size. The -an option removes audio because a typical MJPG-only output is video-only.

If the receiving application specifically requires a raw .mjpg stream rather than an AVI file, use:

ffmpeg -i input.mts -map 0:v:0 -c:v mjpeg -q:v 3 -f mjpeg output.mjpg

Quality and compatibility limits

This conversion cannot restore detail already lost in the H.264 source. It decodes the MTS video and recompresses every frame as JPEG, so use a low q:v value for better quality and expect substantially larger output.

Resolution and frame rate are preserved unless additional FFmpeg options change them. MJPG output normally has no audio; retain the original MTS if sound is required. AVI with an MJPEG video stream is more widely supported than a raw .mjpg file, but some hardware and analysis programs require the raw stream explicitly.