ffmpegwasm/ffmpeg.wasm

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FFmpeg for browser, powered by WebAssembly

Stars: 17.8k
Forks: 1.1k
Open beginner issues: 0
Indexed issues: 388

Dominant language: C
License: MIT
Last GitHub push: Sep 17, 2025
Latest indexed: Sep 15, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: help wanted
PR merge metrics: No merged PRs in 30d

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388 issues indexed so far

ffmpeg.wasm audio concatination is not working in browser Open

ffmpegwasm/ffmpeg.wasm#488 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
WebGPU support Open

ffmpegwasm/ffmpeg.wasm#489 · 1 comment · 16 reactions · 0 assignees · Indexed Sep 15, 2026
How to stream decode Open

ffmpegwasm/ffmpeg.wasm#490 · 0 comments · 6 reactions · 0 assignees · Indexed Sep 15, 2026
`ffmpeg.wasm-core` fails to build in docker Open

ffmpegwasm/ffmpeg.wasm#492 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Memory leak Open

ffmpegwasm/ffmpeg.wasm#494 · 8 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
[cause]: TypeError [ERR_INVALID_URL]: Invalid URL Open

ffmpegwasm/ffmpeg.wasm#497 · 1 comment · 7 reactions · 0 assignees · Indexed Sep 15, 2026
SharedArrayBuffer is not defined in "vite preview" mode while it works fine in "vite" mode with @ffmpeg/core": "^0.11.0" Open

ffmpegwasm/ffmpeg.wasm#498 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
编译时出错 Open

ffmpegwasm/ffmpeg.wasm#500 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Uncaught (in promise) TypeError: createFFmpegCore is not a function Open

ffmpegwasm/ffmpeg.wasm#501 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
No longer works in a browser Open

ffmpegwasm/ffmpeg.wasm#502 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Can't build - bash: ./build.sh: No such file or directory Open

ffmpegwasm/ffmpeg.wasm#504 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
npm i fails Open

ffmpegwasm/ffmpeg.wasm#507 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
doesn't work, no examples for modern js Open

ffmpegwasm/ffmpeg.wasm#508 · 2 comments · 5 reactions · 0 assignees · Indexed Sep 15, 2026
Implement FFPLAY Open

ffmpegwasm/ffmpeg.wasm#510 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Does not support H265 encoding, does not support 4K video encoding Open

ffmpegwasm/ffmpeg.wasm#511 · 12 comments · 2 reactions · 0 assignees · Indexed Sep 15, 2026
React app build failing after installing ffmpeg/ffmpeg Open

ffmpegwasm/ffmpeg.wasm#512 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
ffmpeg.FS('readFile', 'output.mp4') error. Check if the path exists Open

ffmpegwasm/ffmpeg.wasm#513 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Not allowed to load local resource Open

ffmpegwasm/ffmpeg.wasm#514 · 6 comments · 4 reactions · 0 assignees · Indexed Sep 15, 2026
Not adding subtitles into video Open

ffmpegwasm/ffmpeg.wasm#515 · 3 comments · 2 reactions · 0 assignees · Indexed Sep 15, 2026
build ffmpeg.wasm error Open

ffmpegwasm/ffmpeg.wasm#517 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Support hevc_videotoolbox Open

ffmpegwasm/ffmpeg.wasm#518 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Playground throws DataCloneError on Safari Open

help wanted

ffmpegwasm/ffmpeg.wasm#528 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Chrome and Edge not support multi-thread (Test in playground) Open

ffmpegwasm/ffmpeg.wasm#530 · 21 comments · 3 reactions · 0 assignees · Indexed Sep 15, 2026
FFmpeg hangs on load and no console errors are displayed Open

ffmpegwasm/ffmpeg.wasm#532 · 39 comments · 24 reactions · 0 assignees · Indexed Sep 15, 2026
Deduplicate wasm binary in distribution Open

enhancement

ffmpegwasm/ffmpeg.wasm#535 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Add TypeScript code in Usage Open

documentation

ffmpegwasm/ffmpeg.wasm#538 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Chrome - unable to extract single image in mt version (Firefox works) Open

ffmpegwasm/ffmpeg.wasm#542 · 2 comments · 3 reactions · 0 assignees · Indexed Sep 15, 2026
webpack error when module contains dynamic import: "Automatic publicPath is not supported in this browser" (when running tests) Open

ffmpegwasm/ffmpeg.wasm#545 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
in umi，ffmpeg.load fail，indicate Error: Cannot find module Open

help wanted

ffmpegwasm/ffmpeg.wasm#552 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
SecurityError: Failed to construct 'Worker' Open

help wanted

ffmpegwasm/ffmpeg.wasm#560 · 13 comments · 9 reactions · 0 assignees · Indexed Sep 15, 2026
Add Angular example Open

documentation

ffmpegwasm/ffmpeg.wasm#561 · 5 comments · 9 reactions · 0 assignees · Indexed Sep 15, 2026
RuntimeError: memory access out of bounds - after a lot of mp3 conversion Open

triage

ffmpegwasm/ffmpeg.wasm#563 · 5 comments · 9 reactions · 0 assignees · Indexed Sep 15, 2026
The video is not loading and not merging Open

ffmpegwasm/ffmpeg.wasm#564 · 2 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
Need a code for given FFMPEG command. Open

ffmpegwasm/ffmpeg.wasm#565 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Nuxt framework project introduction of @ffmpeg/ffmpeg Open

ffmpegwasm/ffmpeg.wasm#566 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Smaller build sizes Open

ffmpegwasm/ffmpeg.wasm#569 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
No such filter: 'zscale' - Add zscale filter to binary ? Open

ffmpegwasm/ffmpeg.wasm#570 · 12 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Stuck at stream mapping Open

ffmpegwasm/ffmpeg.wasm#578 · 1 comment · 10 reactions · 0 assignees · Indexed Sep 15, 2026
Safari Desktop Problem loading the wasm (Not tested on mobile) Open

ffmpegwasm/ffmpeg.wasm#582 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Throw error: Unhandled Promise Rejection: DataCloneError on Safari for iOS Open

ffmpegwasm/ffmpeg.wasm#584 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
（sos Help me)Vue2.7.14+Webpack5.87.0该如何导入使用ffmpeg Open

ffmpegwasm/ffmpeg.wasm#585 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Can't find selected font provider Open

ffmpegwasm/ffmpeg.wasm#588 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
About worker.js Open

ffmpegwasm/ffmpeg.wasm#594 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Multithreading is not working on any Chromium-based browser, but it's working perfectly on Firefox. Open

ffmpegwasm/ffmpeg.wasm#597 · 15 comments · 15 reactions · 0 assignees · Indexed Sep 15, 2026
how use ffmpeg.wasm to send rtcmulticonnection screen sharing to rtmp server like youtube Open

ffmpegwasm/ffmpeg.wasm#598 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Progress event value Open

ffmpegwasm/ffmpeg.wasm#600 · 10 comments · 10 reactions · 0 assignees · Indexed Sep 15, 2026
Vite: Cannot use import statement outside a module Open

ffmpegwasm/ffmpeg.wasm#603 · 6 comments · 7 reactions · 0 assignees · Indexed Sep 15, 2026
No such file or directory Open

ffmpegwasm/ffmpeg.wasm#608 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Uncaught (in promise) RuntimeError: Aborted(CompileError: WebAssembly.instantiate(): expected magic word 00 61 73 6d, found 3c 21 44 4f @+0). Build with -sASSERTIONS for more info. Open

ffmpegwasm/ffmpeg.wasm#609 · 5 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
emscripten_sleep does not work becuase the native setTimeout is overwritten Open

ffmpegwasm/ffmpeg.wasm#611 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026

ffmpegwasm/ffmpeg.wasm

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