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Show HN: FFmpeg WebCLI – Full FFmpeg in Browser, Offline PWA, No Uploads(WASM)

https://github.com/tejaswigowda/ffmpeg-webCLI
33•tejaswigowda•1h ago
Built a browser-based FFmpeg editor that runs entirely client-side via WebAssembly. Your files never leave your device -- all processing happens in a Web Worker. Works offline as an installable PWA after first load.

Comments

westurner•1h ago
From https://news.ycombinator.com/item?id=44717303 :

> Objective metrics and tools for video encoding and source signal quality: netflix/vmaf, easyVmaf, psy-ex/metrics, ffmpeg-quality-metrics,

netflix/vmaf: https://GitHub.com/netflix/vmwaf

gdavila/easyVmaf: https://github.com/gdavila/easyVmaf

psy-ex/metrics: https://github.com/psy-ex/metrics/

slhck/ffmpeg-quality-metrics: Calculate quality metrics with FFmpeg (SSIM, PSNR, VMAF, VIF) https://github.com/slhck/ffmpeg-quality-metrics

Something like this would be great too:

The Ardour Manual > Loudness Analyzer and Normalizer: https://manual.ardour.org/mixing/basic-mixing/loudness-analy...

jamal-kumar•1h ago
Any chance those AVX-512 optimizations they released a while ago work within this? [1]

[1] https://www.phoronix.com/news/FFmpeg-July-2025-AVX-512

dtf•36m ago
I think WASM SIMD is only 128-bit wide.
adzm•26m ago
Note those only apply to scene_sad which is used for scene change detection and freeze detection and a few other things like mpdecimate -- it's a very specific use case
senshi001•36m ago
Just a thought - is the text “Click to upload” with a cloud icon perhaps a bit misleading?

If it’s fully client side, then you are just opening a file in essence - no clouds in sight!

pooploop64•22m ago
I agree something like a folder or file icon would be more accurate.
ale42•30m ago
Nice interface at a first glance, for sure can be useful for users who would find using the actual thing too cumbersome. How does performance compare to the native app? Is any form of hardware decoding/encoding like h264_nvenc available? (I guess not?)
dtf•23m ago
I would imagine the only way to use NVENC directly from a browser would be via WebCodecs.

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