Trim MJPEG

How to Trim MJPEG Videos

1. Upload your MJPEG file — Click "+ Add Files" or drag and drop your Motion JPEG video.
2. Set trim points — Under "Trim," select "Time Range" and enter a start time and duration.
3. Adjust compression (optional) — Under "File Compression," select "Quality Preset" (Highest to Lowest), "Target file size (%)", "Specific file size," "Constant Bitrate," "Variable Bitrate," "Constant Quality" (CRF), or "Constraint Quality."
4. Adjust resolution (optional) — Under "Video resolution," keep original, pick a preset (1080p, 720p, etc.), or enter exact width/height.
5. Trim and download — Click "Trim" and download your trimmed MJPEG file.

Why Trim MJPEG Files?

MJPEG (Motion JPEG) encodes each video frame as a separate JPEG image — no inter-frame compression. This makes it common in IP security cameras, webcams, industrial machine vision systems, and older digital cameras. MJPEG recordings are often hours long (surveillance) or contain setup/idle time (webcam captures) that needs trimming.

Because each frame is independent, MJPEG files are significantly larger than H.264 or H.265 video at the same resolution. Trimming removes unwanted footage and optionally compresses the output for major file size reduction.

MJPEG Sources and Trim Scenarios

Source	Typical Duration	Trim Use Case
IP security camera	Hours–days	Isolate incident footage
Webcam recording	Minutes–hours	Remove idle/setup time
Industrial camera	Continuous	Extract inspection segment
Older digital camera	Minutes	Shorten clip for sharing

Frequently Asked Questions

What is MJPEG format?

MJPEG (Motion JPEG) stores each video frame as an independent JPEG image. Unlike H.264 which uses inter-frame compression, MJPEG has no frame dependencies — making it easy to edit but resulting in larger files.

Can I compress while trimming?

Yes. Under "File Compression," choose any method. MJPEG files are typically large, so compression during trim can dramatically reduce file size — "Target file size (%)" at 30% is common for surveillance footage.

Should I trim as MJPEG or convert to MP4?

For continued use in camera/surveillance systems that require MJPEG, keep the format. For sharing or archival, MJPEG to MP4 gives much smaller files with H.264 compression.

Can I also resize while trimming?

Yes. Under "Video resolution," change resolution — useful for reducing 4K surveillance footage to 1080p or 720p for review.

Why are MJPEG files so large?

Each frame is a complete JPEG image with no inter-frame compression. A 1080p MJPEG stream at 30fps can be 10–20× larger than equivalent H.264 video.