• streamer
• fswebcam

Using a standard USB webcam
How to get to know the information about a package before installation in terminal

$ dpkg -l | grep streamer
ii  streamer    3.103-4build1    amd64   television capture tool (images/movies)

$ dpkg-query -L streamer
/.
/usr
/usr/bin
/usr/bin/streamer
/usr/share
/usr/share/doc
/usr/share/doc/streamer
/usr/share/doc/streamer/contrib
/usr/share/doc/streamer/contrib/streamer-wrapper.pl
/usr/share/doc/streamer/copyright
/usr/share/man
/usr/share/man/es
/usr/share/man/es/man1
/usr/share/man/es/man1/streamer.1.gz
/usr/share/man/man1
/usr/share/man/man1/streamer.1.gz
/usr/share/doc/streamer/changelog.Debian.gz

$ apt-cache show streamer
Package: streamer
Architecture: amd64
Version: 3.103-4build1
Priority: extra
Section: universe/graphics
Source: xawtv
Origin: Ubuntu
Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
Original-Maintainer: Maximiliano Curia <maxy@debian.org>
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Installed-Size: 147
Depends: xawtv-plugins (= 3.103-4build1), libc6 (>= 2.15), libjpeg8 (>= 8c)
Suggests: xawtv
Filename: pool/universe/x/xawtv/streamer_3.103-4build1_amd64.deb
Size: 51160
MD5sum: 636721f327bc4f4fde578a00a54c1681
SHA1: 74e33e4701a2f088fb59ee047cf3d2585573b900
SHA256: 8eb2eb221a4f6081e259f2952b94307e37197096594adf14fb5b72ac746d403e
Description-en: television capture tool (images/movies)
 This package provides a tool to capture single/multiple images or
 record movies from a video4linux device.
Description-md5: c56164a96d1b651ec6a53b9c04d5cd9d

$ apt-cache showpkg streamer
Package: streamer
Versions: 
3.103-4build1 (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_bionic_universe_binary-amd64_Packages) (/var/lib/dpkg/status)
 Description Language: 
                 File: /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_bionic_universe_binary-amd64_Packages
                  MD5: c56164a96d1b651ec6a53b9c04d5cd9d
 Description Language: 
                 File: /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_bionic_universe_binary-i386_Packages
                  MD5: c56164a96d1b651ec6a53b9c04d5cd9d
 Description Language: en
                 File: /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_bionic_universe_i18n_Translation-en
                  MD5: c56164a96d1b651ec6a53b9c04d5cd9d


Reverse Depends: 
  cinnamon,streamer
  streamer:i386,streamer
  xscreensaver,streamer
  prey,streamer
Dependencies: 
3.103-4build1 - xawtv-plugins (5 3.103-4build1) libc6 (2 2.15) libjpeg8 (2 8c) xawtv (0 (null)) streamer:i386 (32 (null)) 
Provides: 
3.103-4build1 - 
Reverse Provides: 

$ apt-cache depends streamer
streamer
  Depends: xawtv-plugins
  Depends: libc6
  Depends: libjpeg8
  Suggests: xawtv