10-02-2017
9 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Are there any nationally recognized UNIX certifications, similar to A+., for basic unix and system admin skills?
thanks (1 Reply)
Discussion started by: pacsman
1 Replies
2. What is on Your Mind?
Hi all,
I'm new to this forum also to unix, but eager to learn unix.
Can any one gimme the certifications/exams available to validate our unix strengths. (7 Replies)
Discussion started by: sarang
7 Replies
3. UNIX for Dummies Questions & Answers
Hello I am a newbie i learnt Shell programming and Unix Internals.Well plz advice me what certifications i shud do as i have free time and want to utilize my time :) (1 Reply)
Discussion started by: strawberry
1 Replies
4. Shell Programming and Scripting
Guys,
I just want information abt certifications available for unix. If they exist can anyone give some info them. Making clear I am pointing to developer level exams, not admin side.
Thanks,
Sharif.S (0 Replies)
Discussion started by: sharifhere
0 Replies
5. AIX
Hi ,
I want to know aix certifications,How to perepare for that ?How many number of papers are there? (12 Replies)
Discussion started by: manoj.solaris
12 Replies
6. Shell Programming and Scripting
Hi All,
Can anybody let me know if there is any Unix certification course which will provide basically programming in Unix. (4 Replies)
Discussion started by: darshakraut
4 Replies
7. What is on Your Mind?
hi there :)
I will study the Linux LPI certification in a few months
What do u think about it?
Is this certification good enough to work with solaris too actually? I´m not sure because i think is more oriented to linux, and solaris as far as i know, is based on UNix.
What else can i... (3 Replies)
Discussion started by: andriusman
3 Replies
8. HP-UX
Hi,
I am planning to get certified on HP-UX.
I googled about HPUX Certifications. I understand that I need to pass on exam HP0-A01 but I find many references to HP0-095.
I bought this book:
HP-UX: HP Certification Systems Administrator, Exam HP0-A01 - Training Guide and Administrator's... (16 Replies)
Discussion started by: psicopunk
16 Replies
9. What is on Your Mind?
Hi ,
I am working in Perl/Shell Script for past 3 years.I am planning to learn and switch my Career as Linux Admin.So Please suggest some certifications to learn about it.Do we have separate sub categories/area of specifications in Linux Admin ? Like Virtualization ,Vmware,storage. ... (0 Replies)
Discussion started by: Ajaytts123
0 Replies
LEARN ABOUT DEBIAN
dv4lstart
DV4LSTART(1) General Commands Manual DV4LSTART(1)
NAME
dv4lstart - redirect V4L API to access a camcorder from a V4L program
SYNOPSIS
dvlstart [options] command [argument ...]
DESCRIPTION
dv4lstart enables command to access a dv1394 (Firewire) camcorder by using the video4linux (V4L) API. dv4lstart uses the LD_PRELOAD facil-
ity to intercept calls to the V4L API and make the camcorder's videostream available.
Check that LD_PRELOAD works in your environment by starting
$ dv4lstart ls -l /dev/video0
The resulting output should look like
crw-rw---- 0 root video 81, 0 Jan 1 1970 /dev/video0
Check your 1394 driver config by starting
$ gst-launch-0.10 dv1394src ! dvdemux ! dvdec ! xvimagesink
from your shell. After turning on your camera, a video window should appear. If this works, dv4lstart should work as well.
Inside command, use /dev/video0. Any existing, real V4L device named /dev/video0 can not be accessed from an application started with
dv4lstart (applications started normally can access the real /dev/video0)
OPTIONS
-c, --color-correction
Set this option if red objects look blue.
-n, --new-dev
Tell dv4lstart to simulate a new video device rather than overriding /dev/video0. Set this option if your application needs to
access other video devices.
-r, --rgb-only
Set this option to prevent V4L applications from choosing YUV palettes. Try this option if you get low frame rates.
-v, --verbose level
Set the amount of debugging messages. A level of 0 means no output at all, 1 is the default, 3 enables all messages.
-h, --help
displays a help message
EXAMPLES
The command
$ dv4lstart v4l-info
outputs some information about the simulated V4L device.
$ dv4lstart -c gqcam -v /dev/video0
starts the gqcam webcam viewer, swapping red and blue colors.
LIMITATIONS
Programs using exotic ways to access the V4L API will not work.
Some environments don't allow the use of LD_PRELOAD for security reasons. dv4lstart will not work there.
If dv4lstart does not work, try dv4l instead.
SEE ALSO
dv4l(1)
DV4LSTART(1)