fswebcam

command-line webcam image capture

TLDR

Capture image

$ fswebcam [image.jpg]

Capture from specific device

$ fswebcam -d [/dev/video0] [image.jpg]

Set resolution

$ fswebcam -r [1280x720] [image.jpg]

Remove banner

$ fswebcam --no-banner [image.jpg]

Add timestamp

$ fswebcam --timestamp "%Y-%m-%d %H:%M" [image.jpg]

Set frame count for better quality

$ fswebcam -F [10] -S [5] [image.jpg]

fswebcam is a small and simple command-line webcam capture utility. It captures images from V4L2 (Video4Linux) devices and saves them as JPEG or PNG files. Source modules include V4L2, V4L1, FILE, RAW, and TEST.The tool is useful for timelapse photography, security camera snapshots, and automated image capture. It supports overlays, timestamps, banners, and various image adjustments.

PARAMETERS

-d, --device dev

Video device (default /dev/video0).

-r, --resolution WxH

Capture resolution.

-F, --frames n

Capture n frames.

-S, --skip n

Skip n frames before capture.

--no-banner

Remove info banner.

--timestamp format

Add timestamp overlay.

--title text

Set banner title.

--subtitle text

Set banner subtitle.

-q, --quiet

Suppress output.

--png level

Save as PNG with compression level (0-9, or -1 for automatic).

--jpeg quality

JPEG quality (0-95, or -1 for automatic).

-i, --input input

Set the input to use (number or name, default "0").

--flip direction

Flip the image (h for horizontal, v for vertical).

--list-inputs

List available inputs for the selected source.

--list-controls

List available controls and their current values.

CONFIGURATION

~/.fswebcam

Optional configuration file for default settings.

CAVEATS

Requires V4L2 compatible webcam. Initial frames may be dark (use -S to skip). Resolution must be supported by camera. Some cameras need time to adjust exposure.

HISTORY

fswebcam was written by Philip Heron as a simple command-line tool for capturing webcam images on Linux. It's designed for scripting and automation rather than interactive use.