Informazioni sui file MJPEG

MJPEG (Motion JPEG · Formato video)

Rilasciato 1993 Di Industry convention

Motion JPEG (.mjpeg) è un formato di file standard supportato da KaijuConverter per l’archiviazione, la condivisione e la conversione multipiattaforma.

Famiglia

Video Files

Estensione

.mjpeg

Tipo MIME

video/x-motion-jpeg

Utilizzabile come

Input Output

La storia

COME MJPEG
È NATO.

Motion JPEG is the simplest approach to video: compress each frame independently as a full JPEG. No inter-frame prediction, no keyframe gaps — every frame is a complete standalone picture. M-JPEG was the video format inside QuickTime on early 1990s Macs and inside every digital camcorder’s "video mode" before MPEG-4 existed.

The trade-off is obvious: files are 3-5× larger than MPEG-2 for equivalent quality. The payoff: simple hardware, fast random access (any frame is a keyframe), and editability with no transcoding loss. That made M-JPEG the standard format of security cameras for two decades (an IP camera that can write JPEGs can trivially stream M-JPEG), Canon DSLR video capture pre-2008, and the default "low-CPU video" option on a thousand embedded boards. Even today, many IP-camera RTSP streams are M-JPEG — the codec that refuses to die because it’s too simple to kill.

CURIOSITÀ E
ANEDDOTI.

Every frame in a Motion JPEG stream is a complete JPEG — rename the stream and any JPEG decoder handles frames one by one.

Security cameras and webcams have streamed M-JPEG for 25 years because it requires no inter-frame state.

Canon DSLRs from 2005-2008 recorded video as M-JPEG inside AVI containers — notoriously huge files.

Motion JPEG has no official standard — the convention predates formal standardization and varies subtly between implementations.

Modern IP cameras often offer both H.264 (bandwidth-efficient) and M-JPEG (simple, low-latency) streams side by side.

PUNTI DI FORZA E
LIMITAZIONI.

Punti di forza

Trivially simple — any JPEG decoder handles frames.
Every frame is a keyframe — instant seek and edit.
No inter-frame dependencies — recover from packet loss easily.
Hardware cost is minimal — any JPEG decoder works.
Lossless across edits — cutting and rejoining doesn't degrade quality.

Limitazioni

3-5× larger than MPEG-2; 8-10× larger than H.264 at comparable quality.
No audio — requires a separate track.
No standard container — appears inside AVI, MOV, MKV, MJPEG-over-HTTP.
Obsolete for mass-market delivery.

Dimensioni e pesi tipici

1-min VGA webcam clip

40-80 MB

1-min 1080p IP camera stream

300-500 MB

Canon DSLR 720p video (1 min)

~550 MB

Specifiche tecniche

MIME type: video/x-motion-jpeg
Extension: .mjpeg, .mjpg
Frame format: Sequential JPEG (Baseline, usually 4:2:0)
Typical containers: AVI, MOV, MP4 (rare), raw stream
Common in: IP security cameras, USB webcams, scientific imaging

CONVERTI DA
MJPEG

mjpeg jpg mjpeg png mjpeg webp mjpeg gif mjpeg bmp mjpeg mp4 mjpeg mov mjpeg mkv mjpeg avi mjpeg webm mjpeg flv mjpeg wmv mjpeg mpeg mjpeg 3gp mjpeg mp3 mjpeg wav mjpeg flac mjpeg aac mjpeg m4a mjpeg ogg mjpeg opus mjpeg wma mjpeg ogv mjpeg m4v mjpeg ts mjpeg asf mjpeg dv mjpeg f4v mjpeg h264 mjpeg h265 mjpeg m2v mjpeg mxf mjpeg rm mjpeg rmvb mjpeg divx mjpeg nut mjpeg y4m

CONVERTI IN
MJPEG

mp4 mjpeg mov mjpeg mkv mjpeg avi mjpeg webm mjpeg flv mjpeg wmv mjpeg asf mjpeg dv mjpeg f4v mjpeg h264 mjpeg h265 mjpeg m2v mjpeg mxf mjpeg rm mjpeg rmvb mjpeg divx mjpeg nut mjpeg y4m mjpeg mpeg mjpeg 3gp mjpeg ogv mjpeg vob mjpeg m4v mjpeg ts mjpeg m2ts mjpeg mts mjpeg swf mjpeg mpg mjpeg

Casi d'uso comuni

Security cameras, IP cameras, webcam streams, frame-accurate video editing