我已经尝试了一切
apt-cache search webcam |sort -u
一切都有问题。纠正任何语法错误，展示如何使用 CLI 中的“仅 GUI”或一个好的 ffmpeg/mencoder/vlc one-liner 将回答我的问题。或者因为我知道如何让 ffmpeg 取一个短的 MJPEG，展示如何剥离第一个 jpeg 会起作用，我猜。不过，这应该比那更直接。
$ camgrab
/dev/video0: no v4l device
（camgrab 可能不处理 v4l2）
$ fswebcam --list-inputs
--- Opening /dev/video0...
Trying source module v4l2...
/dev/video0 opened.
--- Available inputs:
0: Camera 1
No input was specified, using the first.
Adjusting resolution from 384x288 to 352x288.
--- Capturing frame...
Premature end of JPEG file
Captured frame in 0.00 seconds.
--- Processing captured image...
There are unsaved changes to the image.
$ fswebcam --input 0 boo.jpg
--- Opening /dev/video0...
Trying source module v4l2...
/dev/video0 opened.jjjjjjjjj
Adjusting resolution from 384x288 to 352x288.
--- Capturing frame...
Premature end of JPEG file
Captured frame in 0.00 seconds.
--- Processing captured image...
Writing JPEG image to 'boo.jpg'.
产生这个
$ motion
超出了我。
$ uvccapture -oboo.jpg
$ file boo.jpg
boo.jpg: data
$ qiv -t boo.jpg
Unable to read file: Failed to load image 'boo.jpg': Error interpreting JPEG image file (Not a JPEG file: starts with 0x8f 0x5a)
不是真正的图像。
$ /usr/bin/vgrabbj -d /dev/video0 -f boo.jpg
Could not open configfile /usr/etc/vgrabbj.conf, ignoring
Reading image from /dev/video0
产生这个
$ webcamd
RTFM, missing template (/home/$USER/.webcamd/index_up.html)
$ man webcamd |cat
WEBCAMD(1) WEBCAMD(1)
NAME
webcamd - Take a image from your webcam
SYNOPSIS
webcamd [ start | stop | refresh ]
DESCRIPTION
This manual page documents briefly the webcamd daemon.
This manual page was written for the Debian distribution because the original pro?
gram does not have a manual page.
webcamd is a program that take images from your webcam and put it on a ftp server
on a local (web) directory
OPTIONS
start Start the daemon.
stop Stop the daemon.
refresh Take a shot !
AUTHOR
This manual page was written by Julien Danjou <acid@debian.org> for the Debian
system (but may be used by others). Permission is granted to copy, distribute
and/or modify this document under the terms of the GNU Free Documentation License,
Version 1.1 or any later version published by the Free Software Foundation; with
no Invariant Sections, no Front-Cover Texts and no Back-Cover Texts.
2002 april 21 WEBCAMD(1)
$ webcamd start
RTFM, missing template (/home/$USER/.webcamd/index_up.html)
$ webcamd refresh
RTFM, missing template (/home/$USER/.webcamd/index_up.html)
网络摄像头似乎要求我在某处设置一个配置文件来 ftp 图像，并且默认情况下似乎什么都不做
$ /usr/bin/webcam
reading config file: /home/$USER/.webcamrc
video4linux webcam v1.5 - (c) 1998-2002 Gerd Knorr
grabber config:
size 320x240 [none]
input (null), norm (null), jpeg quality 75
rotate=0, top=0, left=0, bottom=240, right=320
从这里
Streamer
Streamer (http://linux.bytesex.org/xawtv/) is a versatile program that allows a
capture from a webcam or video device using only the command line. It may be offered
in your Linux distribution's Xawtv package. To install streamer try
# sudo apt-get install xawtv
To take a standard JPEG picture from the command line where the camera is accessed
through /dev/video0:
#streamer -c /dev/video0 -b 16 -o outfile.jpeg
Where > -b is the number of colors (in bpp,whether 15, 16, 24 or 32)
& -o is the output filename in the current directory
If you are going to capture multiple images be sure to append the output file name
with zeros, as streamer can name the capture files in sequence, i.e., -o
outfile000.jpeg becomes outfile001.jpeg, outfile002.jpeg, and so on.
来自评论：流光不包含在 xawtv 包中， sudo apt-get install streamer