1.4 KiB
FAQ
What is the license of ffmpeg.wasm?
There are two components inside ffmpeg.wasm:
- @ffmpeg/ffmpeg (https://github.com/ffmpegwasm/ffmpeg.wasm)
- @ffmpeg/core (https://github.com/ffmpegwasm/ffmpeg.wasm-core)
@ffmpeg/core contains WebAssembly code which is transpiled from original FFmpeg C code with minor modifications, but overall it still following the same licenses as FFmpeg and its external libraries (as each external libraries might have its own license).
@ffmpeg/ffmpeg contains kind of a wrapper to handle the complexity of loading core and calling low-level APIs. It is a small code base and under MIT license.
What is the maximum size of input file?
2 GB, which is a hard limit in WebAssembly. Might become 4 GB in the future.
How can I build my own ffmpeg.wasm?
In fact, it is @ffmpeg/core most people would like to build.
To build on your own, you can check Contribution Guide
Also you can check this series of posts to learn more fundamental concepts (OUTDATED, but still good to learn foundations):
- https://jeromewu.github.io/build-ffmpeg-webassembly-version-part-1-preparation/
- https://jeromewu.github.io/build-ffmpeg-webassembly-version-part-2-compile-with-emscripten/
- https://jeromewu.github.io/build-ffmpeg-webassembly-version-part-3-v0.1/
- https://jeromewu.github.io/build-ffmpeg-webassembly-version-part-4-v0.2/