Help with bash script!
Posted: 23 Jan 2015 00:38
I am trying to capture a picture from a wireless webcam at a specific interval (starting at 0600, every two hours until 2000). So I found this command that will capture an image when run from the command line (this is a headless server). Thing is, it throws up a bunch of stuff on the screen, like the image is being generated from letters and numbers in colors.
Anyways, when I put it in a script (pasted below) and run it same thing. Image is created, and renamed. When I run this same script through cron it fails. As a regular user it produces no errors, as root it fails because VLC doesn't like root. Anyways- is there a fix to this script? Thank you in advance.
When it is run from the command line this is the output:
Mail from postfix localonly on run through cron:
Anyways, whatever else you need, let me know. I have very little clue what I am doing, if it isn't already obvious. 
Anyways, when I put it in a script (pasted below) and run it same thing. Image is created, and renamed. When I run this same script through cron it fails. As a regular user it produces no errors, as root it fails because VLC doesn't like root. Anyways- is there a fix to this script? Thank you in advance.
Code: Select all
#!/bin/bash
vlc -I dummy http://login:password@192.168.44.19/snapshot.cgi --video-filter scene --no-audio --scene-path /path/to/TimeLapse/Tree/ --scene-prefix image_prefix --scene-format png vlc://quit --run-time=1 --quiet
DATE=$(date +"%F_%H%M")
mv /path/to/TimeLapse/Tree/image_prefix00001.png /path/to/TimeLapse/Tree/$DATE.pngCode: Select all
VLC media player 2.1.4 Rincewind (revision 2.1.4-0-g2a072be)
VLC media player 2.1.4 Rincewind
Command Line Interface initialized. Type `help' for help.
> Fontconfig warning: FcPattern object size does not accept value "0"
Fontconfig warning: FcPattern object size does not accept value "0"
commandline read: vlc
commandline read: http://login:password@192.168.44.19/snapshot.cgi
commandline read: --video-filter
commandline read: scene
commandline read: --no-audio
commandline read: --scene-path
commandline read: /path/to/TimeLapse/Tree/
commandline read: --scene-prefix
commandline read: image_prefix
commandline read: --scene-format
commandline read: png
commandline read: vlc://quit
commandline read: --run-time=1
commandline read: --quiet
~~~~~~~~~~~~~~~~~~~~~~~~~~| DirectFB 1.2.10 |~~~~~~~~~~~~~~~~~~~~~~~~~~
(c) 2001-2008 The world wide DirectFB Open Source Community
(c) 2000-2004 Convergence (integrated media) GmbH
----------------------------------------------------------------
(*) DirectFB/Core: Single Application Core. (2012-05-21 06:44)
(*) Direct/Memcpy: Using Generic 64bit memcpy()
(!) Direct/Util: opening '/dev/fb0' failed
--> Permission denied
(!) DirectFB/FBDev: Error opening framebuffer device!
(!) DirectFB/FBDev: Use 'fbdev' option or set FRAMEBUFFER environment variable.
(!) DirectFB/Core: Could not initialize 'system_core' core!
--> Initialization error!Code: Select all
To: person@localhost
Subject: Cron <person@localhost> /home/person/.local/bin/imageCapture.sh
Content-Type: text/plain; charset=ANSI_X3.4-1968
X-Cron-Env: <SHELL=/bin/sh>
X-Cron-Env: <HOME=/home/username>
X-Cron-Env: <PATH=/usr/bin:/bin>
X-Cron-Env: <LOGNAME=login>
Message-Id: <20150122231104.76278A0F11@localhost>
Date: Thu, 22 Jan 2015 18:11:04 -0500 (EST)
Fontconfig warning: FcPattern object size does not accept value "0"
Fontconfig warning: FcPattern object size does not accept value "0"
commandline read: vlc
commandline read: -I
commandline read: dummy
commandline read: http://login:password@192.168.44.19/snapshot.cgi
commandline read: --video-filter
commandline read: scene
commandline read: --no-audio
commandline read: --scene-path
commandline read: /path/to/TimeLapse/Tree/
commandline read: --scene-prefix
commandline read: image_prefix
commandline read: --scene-format
commandline read: png
commandline read: vlc://quit
commandline read: --run-time=1
commandline read: --quiet
~~~~~~~~~~~~~~~~~~~~~~~~~~| DirectFB 1.2.10 |~~~~~~~~~~~~~~~~~~~~~~~~~~
(c) 2001-2008 The world wide DirectFB Open Source Community
(c) 2000-2004 Convergence (integrated media) GmbH
----------------------------------------------------------------
(*) DirectFB/Core: Single Application Core. (2012-05-21 06:44)
(*) Direct/Memcpy: Using Generic 64bit memcpy()
(!) Direct/Util: opening '/dev/fb0' failed
--> Permission denied
(!) DirectFB/FBDev: Error opening framebuffer device!
(!) DirectFB/FBDev: Use 'fbdev' option or set FRAMEBUFFER environment variable.
(!) DirectFB/Core: Could not initialize 'system_core' core!
--> Initialization error!
Error opening terminal: unknown.
mv: cannot stat ‘/path/to/TimeLapse/Tree/image_prefix00001.png’: No such file or directory