rust-ffmpeg-static

This is a showcase for a rust project based on the rust-ffmpeg with statically compiled FFmpeg (and dependencies).

Note: This currently only works on 64 bit linux maschines.

Usage

Please initialize the git submodules and run the shell build script. After that you can build the project using cargo and run the main program without having ffmpeg or its dependencies installed.

git submodule update --init
sh build.sh
cargo build
./target/debug/rust-ffmpeg-static mp3 libmp3lame h264 ogg

The output to that last command is (on my maschine) the following. Note that the dependencies for mp3 and h264 were explicitly compiled and enabled using ffmpeg configure flags in the build.sh script while ogg is not supported.

type: decoder
    id: MP3
    name: mp3
    description: MP3 (MPEG audio layer 3)
    medium: Audio
    [.. snip ..]

type: encoder
    id: MP3
    name: libmp3lame
    description: libmp3lame MP3 (MPEG audio layer 3)
    medium: Audio
    [.. snip ..]
type: decoder
    id: H264
    name: h264
    description: H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
    medium: Video
    [.. snip ..]

How it works

The ffmpeg source code together with the needed dependencies resides in the directory native/. Whenever there is a public git repository the code was added via a git submodule. There are unfortunately some dependencies that are only available via release source code archives (libmp3lame for example).

The build.sh file sets up an environment and builds every project in the native/ directory. Please note that these projects are compiled statically. It is also necessary to enable position indipendent code and to disable assember extensions to sucessfully build them statically. The resulting libraries will be placed in target/native/lib.

We now can override the native link search path for the implicit rust-ffmpeg-sys dependency to ensure, that our just build libraries are used. See .cargo/config for this.

Inconveniently we need to explicitly add every static library to the file build.rs to tell the rustc compiler to also link these into the final binary.