# Encode Wiki

> Practical, community-maintained knowledge about codecs and encoding tools.

Content version: 113a5f7a0e5c86f6ff84344ca34634b3e7d26f4e

The canonical human-readable site is https://encode.wiki/. Migrated content is available under CC BY-SA 4.0 with source and modification metadata on every API document. Content marked `needs-review` may be outdated or incomplete.

## Start here and guides

- [Handle audio and subtitles in the final container](https://encode.wiki/api/v1/markdown/docs/guides/audio-and-subtitles.md): Map every intended stream explicitly and validate language, disposition, and compatibility. [needs-review]
- [Encode AV1 with SVT-AV1 and FFmpeg](https://encode.wiki/api/v1/markdown/docs/guides/av1-with-svt-av1.md): Create a short constant-quality AV1 sample with explicit mapping and verification. [needs-review]
- [Choose a codec and encoder](https://encode.wiki/api/v1/markdown/docs/guides/choose-a-codec.md): Select a codec, implementation, and container from the constraints of your workflow. [needs-review]
- [Compare encoding quality with metrics and visual checks](https://encode.wiki/api/v1/markdown/docs/guides/compare-encoding-quality.md): Align reference and distorted media, calculate metrics, inspect outliers, and preserve data. [needs-review]
- [Make and validate a first FFmpeg video encode](https://encode.wiki/api/v1/markdown/docs/guides/first-ffmpeg-encode.md): Inspect a source, encode one short H.264 sample, and verify the resulting streams. [needs-review]
- [Preserve color and HDR metadata safely](https://encode.wiki/api/v1/markdown/docs/guides/preserve-color-and-hdr.md): Inspect color signaling, avoid unsupported conversions, and verify the encoded result. [needs-review]
- [Choose quality controls, bitrate, presets, and passes](https://encode.wiki/api/v1/markdown/docs/guides/quality-controls.md): Decide whether a workflow should target quality, file size, bitrate, or delivery bounds. [needs-review]
- [Machine-readable access](https://encode.wiki/api/v1/markdown/docs/reference/machine-access.md): Stable Markdown, JSON, OpenAPI, and downloadable corpus interfaces for agents and independent clients. [current]
- [Prologue](https://encode.wiki/api/v1/markdown/docs/start-here/encoding-basics.md): Multimedia compression has allowed us to communicate information and expression in novel ways as the unsung hero of the modern Web. Despite this, it is often difficult to uncover information about codec technology that i [current]
- [high-dynamic-range](https://encode.wiki/api/v1/markdown/docs/start-here/high-dynamic-range.md): HDR is a technology used in modern TVs and displays to produce more vibrant and lifelike images. In simple terms, it allows your TV to display a wider range of colors and brightness levels than standard displays. This me [current]
- [Lossless Compression](https://encode.wiki/api/v1/markdown/docs/start-here/lossless.md): Lossless compression is a method of data compression that allows the original data to be perfectly reconstructed from the compressed data. This is particularly important in applications where perfectly preserving the ori [needs-review]
- [Lossy Compression](https://encode.wiki/api/v1/markdown/docs/start-here/lossy.md): Lossy multimedia compression reduces the file size of multimedia data by permanently removing some of the information. This process leverages the limitations of the human senses, fidelity metrics, or appeal metrics to di [needs-review]
- [psychovisual](https://encode.wiki/api/v1/markdown/docs/start-here/psychovisual.md): "Psychovisual fidelity" is a common term used in video encoding to describe the quality of an encoded video as perceived by the human visual system. It has a number of alternate terms that mean the same thing: - "Percept [current]
- [Terminology](https://encode.wiki/api/v1/markdown/docs/start-here/terminology.md): When learning about encoding technology, it is important to understand the vast terminology that is often used to describe concepts that are often not very complex to understand. [current]
- [video-artifacts](https://encode.wiki/api/v1/markdown/docs/start-here/video-artifacts.md): Codec Wiki reference material about video-artifacts. [current]

## Complete machine interfaces

- [Corpus index](https://encode.wiki/api/v1/index.json): metadata and retrieval URLs for every public page.
- [Author index](https://encode.wiki/api/v1/authors.json): typed public author profiles referenced by articles.
- [OpenAPI 3.1](https://encode.wiki/api/v1/openapi.json): static API contract.
- [Release metadata](https://encode.wiki/api/v1/release.json): content version and checksums.
- [Compressed knowledge bundle](https://encode.wiki/api/v1/knowledge.ndjson.gz): complete corpus as NDJSON.
- [All documentation](https://encode.wiki/llms-docs.txt): full cleaned documentation text.
- [All articles](https://encode.wiki/llms-articles.txt): full cleaned article text.

## Optional

- [Article RSS feed](https://encode.wiki/rss.xml)
- [Sitemap](https://encode.wiki/sitemap-index.xml)