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The upscaler.video Codec Support Dataset |
Version: 2026-03-22 |
License: CC-BY 4.0 |
================================================================================ |
OVERVIEW |
-------- |
This dataset contains 363,330,358 individual WebCodecs API compatibility tests |
collected from 1,142,586 real user sessions at free.upscaler.video. |
Each row represents one codec string tested on one user's device, including |
both encoder and decoder support data, along with the full browser user agent |
string for detailed analysis. |
DATASET FILE |
------------ |
upscaler-video-codec-dataset-raw.csv (69.4 GB uncompressed) |
CSV SCHEMA |
---------- |
timestamp - ISO 8601 timestamp of when 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) |
EXAMPLE ROWS |
------------ |
2026-01-05T00:54:11.570Z,"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36...",Edge,Win32,Windows,av01.0.01M.08,true, |
2026-01-16T23:58:08.560Z,"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36...",Chrome,Win32,Windows,avc1.64040c,false,true |
Note: decoder_supported is empty for sessions before Jan 14, 2026. The second |
example shows a codec that can decode but not encode. |
QUICK STATS |
----------- |
Total Tests: 363,330,358 |
Sessions: 1,142,586 |
Unique Codecs: 1,087 |
Collection Period: January 2026 - March 2026 |
Data Source: free.upscaler.video |
Encoder Data: All 1,142,586 sessions |
Decoder Data: Sessions from Jan 14, 2026 onwards |
PLATFORM NORMALIZATION |
---------------------- |
The 'platform' column applies the following normalization: |
Win32, Win64 → Windows |
MacIntel → macOS |
iPhone, iPad → iOS |
Linux armv8*, Android* → Android |
Linux x86_64, Linux aarch64 → Linux |
The 'platform_raw' column contains the original navigator.platform value. |
USAGE EXAMPLES |
-------------- |
Python (pandas): |
import pandas as pd |
df = pd.read_csv('upscaler-video-codec-dataset-raw.csv') |
# Calculate global encoder support per codec |
encoder_support = df.groupby('codec')['encoder_supported'].apply( |
lambda x: (x == 'true').mean() * 100 |
) |
# Calculate decoder support (excluding empty values) |
df_with_decoder = df[df['decoder_supported'] != ''] |
decoder_support = df_with_decoder.groupby('codec')['decoder_supported'].apply( |
lambda x: (x == 'true').mean() * 100 |
) |
R: |
library(readr) |
df <- read_csv('upscaler-video-codec-dataset-raw.csv') |
# Filter for specific browser |
chrome_only <- df[df$browser == 'Chrome',] |
SQL (import to database): |
CREATE TABLE codec_tests ( |
timestamp TIMESTAMP, |
user_agent TEXT, |
browser VARCHAR(50), |
platform_raw VARCHAR(50), |
platform VARCHAR(50), |
codec VARCHAR(100), |
encoder_supported BOOLEAN, |
decoder_supported VARCHAR(10) -- 'true', 'false', or empty string |
); |
CITATION |
-------- |
If you use this dataset in research or publications, please cite: |
Bhattacharyya, Samrat. (2026). The upscaler.video Codec Support Dataset. |
End of preview. Expand in Data Studio
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. 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
The data is compiled and interactively summarized on the project website, webcodecsfundamentals.org, 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 performeduser_agent- Full browser user agent stringbrowser- Browser family (Chrome, Safari, Edge, Firefox, Unknown)platform_raw- Raw platform identifier fromnavigator.platformplatform- 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. A full breakdown of the collection methodology can be found here.
- 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):
@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)}
}
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