An open source policy compliance checker for digital audiovisual files (from MediaArea, the creators of MediaInfo). It helps verify and enforce file format standards and encoding best practices for archival video.

An analyzer and debugging tool for MPEG transport streams and DVB broadcasts. It allows inspection of packet structure, tables (PAT, PMT, etc.), and payload of digital video streams.

A collection of command-line scripts that automate the process of transcoding video files (e.g., using HandBrake/FFmpeg) into formats suitable for streaming and archiving, with sane defaults.

An open source online video and media content management system. It supports uploading, transcoding (via FFmpeg), and streaming of video content, providing a self-hosted YouTube-like platform.

A decentralized video platform built on blockchain (Steem/LBRY), offering an alternative to YouTube where videos are distributed via a peer-to-peer network and blockchain stores metadata and rewards.

A Pythonic binding for FFmpeg’s libraries (Libav). PyAV allows Python programs to read, write, and manipulate video and audio data by leveraging the powerful FFmpeg backend.

A fluent API for using FFmpeg in Node.js applications. It allows programmatic creation of FFmpeg commands for video and audio processing using JavaScript.

A full-featured C++ toolkit for reading, writing, and processing MP4 files. Bento4 is often used for packaging content for MPEG-DASH and HLS, including encryption and manifest generation.

An open source toolkit for video understanding by OpenMMLab. It supports state-of-the-art models for action recognition, temporal action detection, and spatio-temporal detection in videos.

A free library for decoding MPEG-1 and MPEG-2 video streams. It’s lightweight and portable, used in several open source media players for MPEG-2 playback.

A pure Java implementation of common video and audio codecs (H.264, VP8, etc.), enabling decoding and encoding of media entirely in Java without native dependencies.

A cross-platform open source subtitle editor written in Java. It supports multiple subtitle formats, style editing, timing synchronization, and real-time preview of subtitles on video.

A set of video processing routines for use with SciPy, providing basic video reading and writing capabilities for scientific computing workflows in Python.

A Java video processing library providing a set of tools and APIs to handle video operations in Java applications.

An experimental non-linear video editing software from the VideoLAN project. Aims to offer basic editing (cutting, transitions, etc.) with a simple interface, built on libVLC.

An open source nodal video compositing software built on top of OpenFX. It provides a user-friendly interface to apply and connect video effects (an experimental alternative to commercial compositors).

FFmpeg’s FFV1 is a lossless intra-frame video codec. It’s open, extremely efficient for archiving video, and is defined in an ongoing standardization (supported by archival institutions).

An open source lossless video codec from Umezawa that provides fast encoding/decoding and is often used for lossless video compression on Windows (supports RGB and YUV formats).

A lossless video codec for Windows that offers high compression ratios. Useful for archival and intermediate video editing workflows where quality must be preserved (open source).

GoPro’s CineForm codec SDK, open-sourced, providing tools and libraries for the CineForm HD wavelet-based video codec used for high-fidelity video compression.

A set of lightweight tools for multicast and transport stream manipulation (from the VLC project) – used for efficient UDP streaming, recording, and conversion of TS streams.

A simple and powerful MPEG-2/TS demux and streaming application from the VideoLAN project, often used for broadcasting DVB streams (multicast or unicast) over IP networks.

A real-time video mixer (VJ tool) that allows compositing multiple video inputs (live capture, movies, images) with layers and effects, controllable via command-line or Joystick (Linux).

An online library of test video content and sequences provided for researchers and developers to evaluate video processing and streaming techniques (various resolutions, formats, and scenarios).

A lightweight, freeware media player for Windows known for its fast startup and support of all common video formats with configurable keyboard shortcuts.