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# Setting up Transcoding Binaries
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## About Transcoding
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Transcoders are used by Libresonic to convert media from their on disk format
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to a format that can be consumed by clients. This is done not only for compatibility
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but also to save bandwidth when dealing with heavier file types. For example, although your
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library might use the flac format, bandwidth can be saved by converting to mp3 before
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transmission.
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## Bare Minimum setup (Linux)
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*Commands provided below are illustrative*
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Install ffmpeg using your distributions package manager.
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```
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sudo yum install ffmpeg
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```
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In the case that ffmpeg is not available, you have two options.
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- Add a repository that provides ffmpeg
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- Build the binary from source
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- Outdated documentation for this can be found at [TRANSCODE.TXT](developer/TRANSCODE.TXT)
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Create a `transcode` directory within your `libresonic.home` directory:
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```
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mkdir /var/libresonic/transcode
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```
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Ensure it has the correct permissions:
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```
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-bash-4.2$ ls -alhd transcode/
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drwxr-xr-x. 2 tomcat tomcat 41 Jan 7 13:45 transcode/
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```
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Within the `transcode` directory symlink to ffmpeg and verify correct permissions
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```
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-bash-4.2$ cd transcode/
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-bash-4.2$ ln -s /usr/bin/ffmpeg
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-bash-4.2$ ls -alh
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total 4.0K
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drwxr-xr-x. 2 tomcat tomcat 41 Jan 7 13:45 .
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drwxr--r--. 7 tomcat tomcat 4.0K Feb 23 19:23 ..
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lrwxrwxrwx. 1 tomcat tomcat 15 Jan 7 13:45 ffmpeg -> /usr/bin/ffmpeg
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```
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