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# FFmpeg prebuilt for NW.js
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FFmpeg prebuilt binaries with proprietary codecs and build instructions for Window, Linux and macOS.
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### Downloads
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Downloads can be found [here ](https://github.com/iteufel/nwjs-ffmpeg-prebuilt/releases )
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### Build
#### Usage:
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node build[-h] [-c] [--version NW_VERSION] [--arch TARGET_ARCH]
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or
npx nwjs-ffmpeg-prebuilt [-h] [-c] [-d] [--get-download-url] [--version NW_VERSION] [--arch TARGET_ARCH]
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##### Arguments explanied:
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- *-h, --help* : Show the help message and exit
- *-c, --clean* : Clean the workspace, removes downloaded source code
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- *-v NW_VERSION, --version NW_VERSION* : Build ffmpeg for the specified Nw.js version (latest from http://nwjs.io/versions.json if not specified)
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- *-a TARGET_ARCH, --arch TARGET_ARCH* : Target architecture, x86, x64, arm
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- *-d, --download* : Download Prebuild binaries.
- *-p, --platform* : Download platform, darwin, win, linux
- *--get-download-url* : Get Download Url for Prebuild binaries
- *-o, --out* : Output Directory
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#### Specific guides:
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- [Windows guide ](guides/build_windows.md )
- [Linux guide ](guides/build_linux.md )
- [Mac guide ](guides/build_mac.md )
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You can get the FFmpeg source code from [here ](https://chromium.googlesource.com/chromium/third_party/ffmpeg ).
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>### License and Patent Fee
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> Using MP3 and H.264 codecs requires you to pay attention to the patent royalties and the license of the source code. Consult a lawyer if you do not understand the licensing constraints and using patented media formats in your application. For more information about the license of the source code, check [here](https://chromium.googlesource.com/chromium/third_party/ffmpeg.git/+/master/CREDITS.chromium).
