Installation of Opencv.

[sangamswadik]

Hi all.I've just started using Ubuntu today(18.04).I want to install Open CV .I'm following the procedure from Pyimagesearch
https://www.pyimagesearch.com/2018/05/28/ubuntu-18-04-how-to-install-opencv/

when I typed in this I got unable to locate package.

sudo apt-get install libavcodec-dev libavformat-dev libwscale-dev lib41-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package libwscale-dev
E: Unable to locate package lib41-dev

can you please tell me how I can resolve this?
Thanks

[sangamswadik]

I got this for cat -n /etc/apt/sources.list

ubuntu@ubuntu-H310M-H:~$ cat -n /etc/apt/sources.list
1 # deb cdrom:[Ubuntu 18.04 LTS _Bionic Beaver_ - Release amd64 (20180426)]/ bionic main restricted
2 deb-src http://archive.ubuntu.com/ubuntu bionic main restricted universe #Added by software-properties
3
4 # See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
5 # newer versions of the distribution.
6 deb http://in.archive.ubuntu.com/ubuntu/ bionic main restricted universe
7 deb-src http://in.archive.ubuntu.com/ubuntu/ bionic main multiverse restricted
8
9 ## Major bug fix updates produced after the final release of the
10 ## distribution.
11 deb http://in.archive.ubuntu.com/ubuntu/ bionic-updates main restricted universe
12 deb-src http://in.archive.ubuntu.com/ubuntu/ bionic-updates main multiverse restricted universe
13
14 ## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
15 ## team. Also, please note that software in universe WILL NOT receive any
16 ## review or updates from the Ubuntu security team.
17 # deb-src http://in.archive.ubuntu.com/ubuntu/ bionic universe
18 # deb-src http://in.archive.ubuntu.com/ubuntu/ bionic-updates universe
19
20 ## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
21 ## team, and may not be under a free licence. Please satisfy yourself as to
22 ## your rights to use the software. Also, please note that software in
23 ## multiverse WILL NOT receive any review or updates from the Ubuntu
24 ## security team.
25 deb http://in.archive.ubuntu.com/ubuntu/ bionic multiverse
26 # deb-src http://in.archive.ubuntu.com/ubuntu/ bionic multiverse
27 deb http://in.archive.ubuntu.com/ubuntu/ bionic-updates multiverse
28 # deb-src http://in.archive.ubuntu.com/ubuntu/ bionic-updates multiverse
29
30 ## N.B. software from this repository may not have been tested as
31 ## extensively as that contained in the main release, although it includes
32 ## newer versions of some applications which may provide useful features.
33 ## Also, please note that software in backports WILL NOT receive any review
34 ## or updates from the Ubuntu security team.
35 deb http://in.archive.ubuntu.com/ubuntu/ bionic-backports main restricted multiverse universe
36 deb-src http://in.archive.ubuntu.com/ubuntu/ bionic-backports main restricted multiverse universe
37
38 ## Uncomment the following two lines to add software from Canonical's
39 ## 'partner' repository.
40 ## This software is not part of Ubuntu, but is offered by Canonical and the
41 ## respective vendors as a service to Ubuntu users.
42 # deb http://archive.canonical.com/ubuntu bionic partner
43 # deb-src http://archive.canonical.com/ubuntu bionic partner
44
45 # deb-src http://security.ubuntu.com/ubuntu bionic-security universe
46 deb http://security.ubuntu.com/ubuntu/ bionic-security main multiverse restricted universe
47 # deb-src http://security.ubuntu.com/ubuntu bionic-security multiverse
ubuntu@ubuntu-H310M-H:~$

[sangamswadik]

And This.

$ apt-cache policy ubuntu-desktop
ubuntu-desktop:
Installed: 1.417
Candidate: 1.417
Version table:
*** 1.417 500
500 http://in.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
100 /var/lib/dpkg/status

[wildmanne39]

Hello and welcome to the forum!

Please use code tags - if you are using New Reply button - highlight text and use the # button in the text box header.

If using Quick Reply then
at the beginning and at the end.

In the future please combine all the code into one post instead of creating several.

Thanks

[deadflowr]

libv4l-dev > that's a small L.
libswscale-dev > you missed the first S.

All else looks fine.

[sangamswadik]

Hi @deadflowr .Thank you for helping and notifying my mistake.

[sangamswadik]

Hello and welcome to the forum!

Please use code tags - if you are using New Reply button - highlight text and use the # button in the text box header.

If using Quick Reply then
at the beginning and at the end.

In the future please combine all the code into one post instead of creating several.

Thanks


Sure !