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

 (github.com)

46 points | by tejaswigowda 1 hour ago

9 comments

  • majorchord 3 minutes ago
    vibe-coded, and the github repo does not even contain the sources, just a single 'server.js' that is only for the documentation
  • zuzululu 5 minutes ago
    this is ffmpeg running inside the browser am I correct? did not know this was possible. wonder what else we can run via webassembly
  • senshi001 1 hour 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 47 minutes ago
      I agree something like a folder or file icon would be more accurate.
  • ale42 55 minutes 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 48 minutes ago
      I would imagine the only way to use NVENC directly from a browser would be via WebCodecs.
  • luispa 6 minutes ago
    This is dope. Made a PR.
  • jamal-kumar 1 hour 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

    [-]
    • adzm 52 minutes 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
    • dtf 1 hour ago
      I think WASM SIMD is only 128-bit wide.
  • westurner 1 hour 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...

  • thomas_viaelo 13 minutes ago
    [dead]
  • aleksandre_dev 58 minutes ago
    [flagged]