In an average song there are points that require high quality and points
that require low quality (i.e. silence).

Instead of having the whole file at, say, 160kbps CBR (Constant Bit Rate),
we can use VBR (Variable Bit Rate). This allows us to have use low bitrates
at points that does not require high quality (were a higher bitrate would
not affect the sound heard) and high bitrates when needed. The result is
usually a smaller MP3 file, with higher quality.

Unfortunately, the many MP3 decoders estimate the time of a MP3 file based
on the first bitrate they find and the filesize. This means that the
"prediction" used by such decoders is wildly wrong with VBR encoded files
and, as a result, you can get fairly random times for such songs.

As most songs start with silence you usually get the song length being
shown as much longer than it should be. Also when you jump through a
file encoded in VBR, 50% through the file is usually not 50% through the
song.

A VBR null frame is placed at the beginning of the file to tell the MP3
player information about the song length and indexing through the song.

The problem arises because some poor encoders don't produce this null
frame or do so incorrectly and this is what vbrfix attempts to fix.

Vbrfix can also fix other problems with MP3s as it deletes all non-MP3
content (you can keep tags that you state, though). It can also help
when merging two VBR MP3s together with a merging tool and then needing
a newly calculated VBR null frame.

Open-Source Video Trimmer

A front-end for mp3gain based on the wxWidgets toolkit.

A graphical interface for youtube-dl based on Qt.

AV1 is a video codec by the Alliance for Open Media, composed of most
of the important Web companies (Google, Facebook, Netflix, Amazon,
Microsoft, Mozilla...).

AV1 has the potential to be up to 20% better than the HEVC codec, but
the patents license is totally free, while HEVC patents licenses are
insanely high and very confusing.

dav1d supports:
* all the features of AV1, even the less know ones
* 8, 10, 12 bits, and all chroma subsamplings
* all AV1 files that were shared to the developers

With gstreamermm it is possible to
develop applications that work with multimedia in C++.

This library provides decoding and encoding of audio on a playlist. It is
intended to be used as a backend for music player applications. That said,
it is also generic enough to be used as a backend for any streaming audio
processing utility.

QJack makes you connect with the Jack soundserver system with Qt4.

libuvc is a library that supports enumeration, control and streaming for USB
Video Class (UVC) devices, such as consumer webcams.

ZenLib is a C++ utility library. It includes classes for handling
strings, configuration, bit streams, threading, translation
and cross-platform operating system functions.

The Portable C Audio Library (pcaudiolib) provides a C API to different audio devices.
It supports many different platforms, including ones on Linux, MacOS and Windows.

This is a fork of phonon-vlc, rewritten to work with libmpv instead of
libVLC. libmpv supports less features than VLC but they are only
related to memory streams and audio/video dumps. This backend should be
a lightweight alternative to libVLC with less dependencies.

A Python wrapper for the mediainfo library.

VSXu (VSX Ultra) is an OpenGL-based (hardware-accelerated), modular programming environment with its main purpose to visualize music and create graphic effects in real-time.

lapdog is a service that monitors the presence/absence of the devices
on your LAN and executes some actions accordingly.

PcapPlusPlus is a C++ network sniffing and packet parsing and
manipulation framework.

qBittorrent is a bittorrent client programmed in C++ / Qt that uses libtorrent-rasterbar.

It aims to be a good alternative to all other bittorrent clients out there. qBittorrent is fast, stable and provides unicode support as well as many features.

A program which downloads and converts online videos from YouTube, Vimeo,
DailyMotion, MyVideo and many other platforms.

gallery-dl is a command-line program to download image galleries and collections from several image hosting sites.

Hexadecimal and raw packet injector and sniffer. Can be easily combined with other tools to provide a powerful cmdline framework for raw network access.

LinSSID is graphically and functionally similar to iwscanner (Linux) and Inssider (Microsoft™ Windows®). It is written entirely in C++ using Linux wireless tools, Qt5, and Qwt.

NmapSI4 is a complete Qt5-based Gui with the design goals to provide
a complete nmap interface for Users, in order to management all option
of this power security net scanner

Packit (Packet toolkit) is a network auditing tool. Its value is derived
from its ability to customize, inject, monitor, and manipulate IP traffic.
By allowing you to define (spoof) nearly all TCP, UDP, ICMP, IP, ARP,
RARP, and Ethernet header options, Packit can be useful in testing
firewalls, intrusion detection/prevention systems, port scanning,
simulating network traffic, and general TCP/IP auditing. Packit is also
an excellent tool for learning TCP/IP.