Open-source alternatives to Libass

QtAV is a cross-platform media engine and multimedia framework that combines FFmpeg decoding with the Qt framework for audio and video rendering. It functions as a hardware-accelerated video player, an OpenGL video renderer, and a multimedia stream transcoder. The project distinguishes itself through a hardware-abstraction decoding layer that utilizes GPU interfaces such as VA-API and VideoToolbox to decode high-resolution video. It employs a zero-copy memory transfer path to move decoded video data directly to graphics APIs, reducing CPU overhead and enabling high-performance YUV rendering.

Libav github mirror, clone of git://git.libav.org/libav

Miru is a multimedia content aggregator and proxy-enabled media player that provides a unified interface for streaming videos, reading comics, and browsing novels from multiple external sources. It functions as a JavaScript extension platform, allowing users to add new media sources and application features by integrating custom scripts and provider logic. The application integrates with external media tracking services to synchronize viewing progress and maintain media libraries. It also fetches detailed movie and show information from external databases to enrich content displays with metad

Kooha is a screen recorder for Linux desktops that utilizes the Wayland protocol and XDG Portals for secure recording. It functions as a hardware-accelerated screen capture tool that offloads video compression to the GPU to reduce CPU load and power consumption. The application integrates the PipeWire framework to capture system and microphone audio streams and leverages FFmpeg for muxing video streams and exporting various codecs and containers. Its user interface is a native Linux application built with the GTK toolkit. The software covers screen recording and capture of entire displays, s

Real-time media stack and lightweight libwebrtc alternative, built in C++20

C++ wrapper for FFmpeg

OpenH264 is a library for encoding and decoding video using the H.264 standard. It provides tools to transform raw video frames into compressed byte streams and decompress those streams back into raw pixel frames. The project includes a simulcast video stream generator that produces multiple resolutions from a single source. This capability supports adaptive bitrate streaming and real-time video communication across varying network conditions. The system implements video processing workflows including adaptive rate control, slicing-based parallel encoding, and YUV planar buffer management. I

Open h.265 video codec implementation.

Vireo is a lightweight and versatile video processing library written in C++11