LinuxQuestions.org - [SOLVED] Webcam image capture how?

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Webcam image capture how?

Hi, I would like to capture an image or a brief movie from a webcam, but I don't know which Studio1337 utility is best for this? I tried typing guvcview into a console but came up with an error:
"guvcview: error while loading shared libraries: libavcodec.so.52: cannot open shared object file: No such file or directory"

I am not familiar with most of the programs in the multimedia menu so would appreciate any suggestions which one should I use?

guvcview is for uvc compliant web cams

pls post the name model of your webcam and its usb details from this command pls

also is this a inbuilt web cam or on a lead?

Code:

lsusb

Quote:

Originally Posted by aus9 (Post 4750412)

pls post the name model of your webcam and its usb details from this command pls
also is this a inbuilt web cam or on a lead?

Thanks aus9, the webcam is inbuilt in an Acer Aspire One (model KAV60, D250-0BQk) and the lsusb output is:

Code:

sh-4.1# lsusb

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 001 Device 002: ID 1e3d:2096  

Bus 001 Device 003: ID 04f2:b084 Chicony Electronics Co., Ltd 

Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

so I guess the Chicony entry will be the webcam. I think it is uvc compliant as I seem to remember having used guvcview on this netbook when testing other distros.
I thought there might be an equivalent program already installed in Studio 1337.

I just loaded Skype as a trial and it works, so the camera is obviously hooked up and working ok, so I just need a program to access the data stream and let me take a pic or an avi.

You can use the Mplayer for capture image from webcam.

Quote:

Originally Posted by silendo (Post 4751577)

You can use the Mplayer for capture image from webcam.

Thank you. I just tried the Gnome Mplayer that is installed in Studio1337 but I can't see how to make it display the webcam image. Do you think I would need a plugin of some type? Or maybe a specific version of Mplayer?

Which part of the menu allows selection of webcam please? thx

gmic with the use of OpenCV is used for web cams

but you will need to wright some of the code for things more than just image capture

but most OS's have a default installed program for using a web cam

Quote:

Do you think I would need a plugin of some type? Or maybe a specific version of Mplayer?

Gnome-Mplayer is the GUI for Mplayer

Mplayer is a TERMINAL only program

see the manual page

Code:

man mplayer 

--- and the help page---

mplayer --help

ok its uvc ok

http://www.ideasonboard.org/uvc/

as local user test the module is already loaded

Code:

lsmod | grep uvc



below is my output but diff hardware

uvcvideo              61961  0 

videobuf2_vmalloc      2024  1 uvcvideo

videobuf2_core        19731  1 uvcvideo

videodev              85648  1 uvcvideo

media                  10899  2 uvcvideo,videodev

if the module loads ok try running as a local user the command ....gucview....in a terminal and report any errors pls

if module not found then load it with root powers eg sudo modprobe uvcvideo

2) I believe you can also try cheese....but it pulls down too much cruft for my liking YMMV

3) I use alsa and not pulseaudio or jack so if sound issues pls report which you use pls

Provided you installed mplayer, does

Code:

mplayer tv://

show footage from your webcam?

Quote:

Originally Posted by 414N (Post 4752367)

Provided you installed mplayer, does

Code:

mplayer tv://

show footage from your webcam?

Sorry for the delay in replying guys. I will try all suggestions soon. Starting with the "the tv://" command:, yes thanks, it does work! The image displays and I was able to use the prtsc key to capture the screenshot.

console response was:

Code:

sh-4.1# mplayer tv://

mplayer: Symbol `ff_codec_bmp_tags' has different size in shared object, consider re-linking

MPlayer SVN-r33785-4.5.2 (C) 2000-2011 MPlayer Team



Playing tv://.

TV file format detected.

Selected driver: v4l2

 name: Video 4 Linux 2 input

 author: Martin Olschewski <olschewski@zpr.uni-koeln.de>

 comment: first try, more to come ;-)

v4l2: your device driver does not support VIDIOC_G_STD ioctl, VIDIOC_G_PARM was used instead.

Selected device: Webcam

 Capabilities:  video capture  streaming

 supported norms:

 inputs: 0 = Camera 1;

 Current input: 0

 Current format: YUYV

v4l2: ioctl set format failed: Invalid argument

v4l2: ioctl set format failed: Invalid argument

v4l2: ioctl set format failed: Invalid argument

tv.c: norm_from_string(pal): Bogus norm parameter, setting default.

v4l2: ioctl enum norm failed: Invalid argument

Error: Cannot set norm!

Selected input hasn't got a tuner!

v4l2: ioctl set mute failed: Invalid argument

==========================================================================

Opening video decoder: [raw] RAW Uncompressed Video

Movie-Aspect is undefined - no prescaling applied.

VO: [xv] 640x480 => 640x480 Packed YUY2 

Selected video codec: [rawyuy2] vfm: raw (RAW YUY2)

==========================================================================

Audio: no sound

Starting playback...

V:  0.0 4421/4421 ??% ??% ??,?% 0 0 

v4l2: ioctl set mute failed: Invalid argument

v4l2: 4423 frames successfully processed, 401 frames dropped.



Exiting... (Quit)

sh-4.1#

The cat got in the way...
.

Quote:

Originally Posted by l0wt3ch (Post 4752140)

Does this help?
http://murga-linux.com/puppy/viewtopic.php?t=75203

Yes thanks, that worked great. I tried it first by just installing the guvcview pet but on it's own that didn't work (missing library) so I installed the DEP pet aswell and then it was good to go. Managed to record still image and avi aswell. Fantastic.

Just realised that the inbuilt webcam is not going to help me record the screen image (facing the wrong way of course...) - I will have to work out how to ignore the inbuilt cam and activate an external wired one.

Quote:

if the module loads ok try running as a local user the command ....gucview....in a terminal and report any errors pls

Thanks aus9. Guvcview working perfectly now. And sound working too (although it has a sort of slight warbling sound. Will investigate that later)

in your original post you were talking webcam image so yeah

but if you mean screen image....there a lot of screen shot software ...both command and gui

I like the gui of mtpaint....it can take a screenshot or a time delay....and that will include any webcam image

eg I have a usb lead webcam but the image on the screen as been screenshot using mtpaint

http://ompldr.org/vZjNwaA/mtpaint.jpeg

Quote:

Originally Posted by aus9 (Post 4753911)

but if you mean screen image....there a lot of screen shot software ...both command and gui

Actually I'm hoping to be using 3 things - the webcam will be handy for some avi recordings and static screenshots will be handy for others. also I have another thread request for a "screen grabber" of the type that records mouse actions and screen contents. Theres a couple of options there but I have to skill up on the slack-build process.

Thanks for the help everyone. Much appreciated.