katana-video/webcodecs-codec-support

---
license: cc-by-4.0
task_categories:
- tabular-classification
tags:
- webcodecs
- video-processing
- hardware-acceleration
- telemetry
- browser-support
- av1
- h265
pretty_name: WebCodecs Codec Support Dataset
size_categories:
- 100M<n<1B
---

# The upscaler.video Codec Support Dataset

## Dataset Summary
This dataset contains real-world audio and video codec support data passively collected from **1,142,586 unique user sessions** at [free.upscaler.video](https://free.upscaler.video). It uses the WebCodecs API to detect both encoding and decoding support for over 1,000 codec variants across major audio and video codec families (H.264, H.265, VP8, VP9, AV1, AAC, Opus, etc.).

* **Total Tests:** 363,330,358
* **Sessions:** 1,142,586
* **Unique Codecs:** 1,087
* **Collection Period:** January 2026 - March 2026
* **Primary Origin:** [10.5281/zenodo.19187467](https://doi.org/10.5281/zenodo.19187467)

The data is compiled and interactively summarized on the project website, [webcodecsfundamentals.org](https://webcodecsfundamentals.org/datasets/codec-support/), which provides a global overview of real-world hardware acceleration across operating systems and browsers.

## Dataset Structure

### CSV Schema
* `timestamp` - ISO 8601 timestamp of when the test was performed
* `user_agent` - Full browser user agent string
* `browser` - Browser family (Chrome, Safari, Edge, Firefox, Unknown)
* `platform_raw` - Raw platform identifier from `navigator.platform`
* `platform` - Normalized platform (Windows, macOS, iOS, Android, Linux)
* `codec` - WebCodecs codec string tested (e.g., "av01.0.01M.08")
* `encoder_supported` - Whether VideoEncoder supports codec (`true`/`false`)
* `decoder_supported` - Whether VideoDecoder supports codec (`true`/`false`/`empty`)

*Note: `decoder_supported` is empty for sessions before Jan 14, 2026. Encoder data covers all 1.14M sessions.*

### Platform Normalization
The `platform` column applies the following normalization to the raw `navigator.platform` value:
* Win32, Win64 ➔ **Windows**
* MacIntel ➔ **macOS**
* iPhone, iPad ➔ **iOS**
* Linux armv8*, Android* ➔ **Android**
* Linux x86_64, Linux aarch64 ➔ **Linux**

## Dataset Creation & Methodology
Data was collected via client-side telemetry on the rendering engine at [free.upscaler.video](https://free.upscaler.video). A full breakdown of the collection methodology can be found [here](https://free.upscaler.video/research/methodology/).

* **Producer:** Katana Video Inc.
* **Author:** Samrat Bhattacharyya

## Citation Information

If you use this dataset, please cite the original Zenodo repository and the methodology report:

**Dataset Citation (Zenodo):**
```bibtex
@dataset{upscaler_dataset_2026,
author = {Bhattacharyya, Samrat},
title = {Real-World WebCodecs and AV1 Hardware Support Dataset},
month = mar,
year = 2026,
publisher = {Zenodo},
doi = {10.5281/zenodo.19187467},
url = {[https://doi.org/10.5281/zenodo.19187467](https://doi.org/10.5281/zenodo.19187467)}
}