Free online MOV to MJPG converter

Some cameras, industrial capture systems, and older playback or editing programs accept Motion JPEG but not the original MOV container or its H.264 or HEVC video. Converting creates an MJPEG stream, usually as .mjpg or an AVI file, for compatibility; a raw MJPG output normally excludes audio and can be much larger.

What the MOV format is

MOV is a multimedia container developed by Apple for QuickTime. It can store video, audio, subtitles, timecode, metadata, and multiple codec types, including H.264, HEVC, ProRes, and sometimes MJPEG.

iPhones, Apple cameras, digital cameras, screen-recording tools, QuickTime, Final Cut Pro, and many editing applications create MOV files. The .mov extension identifies the container, not one specific compression method, so two MOV files can differ substantially in compatibility, quality, and size.

What the MJPG format is

MJPG, also called Motion JPEG or MJPEG, stores video as a sequence of independent JPEG-compressed frames. It is commonly delivered as a raw .mjpg stream or inside an AVI container with an .avi extension.

Independent frames allow simple decoding, frame-accurate seeking, and compatibility with some webcams, machine-vision systems, capture devices, and older software. MJPEG does not use interframe compression, so it generally needs more storage and bandwidth than H.264 or HEVC at comparable visual quality. A raw MJPG stream usually has no audio track or general-purpose container metadata.

How to convert MOV to MJPG

Using the built-in online converter

1. Open the MOV-to-MJPG converter on 101convert.com; no software installation is required.
2. Upload the .mov file and select MJPG or Motion JPEG as the output format.
3. Choose a quality setting if offered. Use a lower quality value or higher quality preset when the destination device requires clearer frames.
4. Start the conversion and download the resulting .mjpg file. If the target application expects a container, select AVI/MJPEG when that output option is available.

Using FFmpeg

FFmpeg provides predictable codec and quality controls on Windows, macOS, and Linux. To create a raw MJPEG stream without audio, run:

ffmpeg -i input.mov -c:v mjpeg -q:v 3 -an output.mjpg

Here, -c:v mjpeg selects Motion JPEG, -q:v 3 selects high JPEG quality on FFmpeg's scale where lower values are better, and -an removes audio because a raw MJPG stream generally does not carry it.

To create an AVI file containing MJPEG video and uncompressed PCM audio, use:

ffmpeg -i input.mov -c:v mjpeg -q:v 3 -c:a pcm_s16le output.avi

Use the raw .mjpg command for software that specifically requests an MJPEG elementary stream. Use AVI when the receiving program expects a container or needs audio.

Quality, compatibility, and limitations

MJPEG conversion is normally a re-encoding step. If the source MOV already contains MJPEG, FFmpeg may be able to copy the video without quality loss using -c:v copy, but the output still needs a compatible container and stream format. For H.264, HEVC, or ProRes sources, encoding to JPEG introduces another lossy compression stage.

MJPEG files can be several times larger than equivalent H.264 files because every frame is encoded separately. Set the output frame rate and dimensions only when the destination requires them; for example, add -vf scale=1280:-2 -r 30 to produce 1280-pixel-wide video at 30 frames per second.

Some devices accept only specific JPEG pixel formats, resolutions, frame rates, or AVI variants. If a generated file is rejected, check the device specification and try a standard resolution, constant frame rate, and AVI/MJPEG output instead of a raw .mjpg stream.