Cargo unable to find x264 static lib

[giantcow]

Hey folks, I've enabled the build-lib-x264 and build-license-gpl feature flags, and installed libx264-dev on my WSL2 Ubuntu box, but I keep running into a missing library error:

          /usr/bin/ld: /home/kayo/workspace/<project>/target/debug/deps/libffmpeg_sys_next-8d57ee75ba1d7d1e.rlib(libx264.o): in function `set_extradata':
          /home/kayo/workspace/<project>/target/debug/build/ffmpeg-sys-next-fe48f8afe8d060b4/out/ffmpeg-7.0/libavcodec/libx264.c:960: undefined reference to `x264_encoder_headers'
          /usr/bin/ld: /home/kayo/workspace/<project>/target/debug/deps/libffmpeg_sys_next-8d57ee75ba1d7d1e.rlib(libx264.o): in function `X264_init':
          /home/kayo/workspace/<project>/target/debug/build/ffmpeg-sys-next-fe48f8afe8d060b4/out/ffmpeg-7.0/libavcodec/libx264.c:1448: undefined reference to `x264_encoder_maximum_delayed_frames'
          collect2: error: ld returned 1 exit status
...
Caused by:
  process didn't exit successfully: ... LD_LIBRARY_PATH='/home/kayo/workspace/<project>/target/debug/deps:/home/kayo/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib:/home/kayo/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib' ...
...

(This was with after installing libx264-dev via apt)

I've tried building from source as well:

sudo apt remove libx264-dev
sudo apt autoremove
cd ~/workspace
git clone https://code.videolan.org/videolan/x264.git
cd x264
./configure --enable-shared --enable-static --enable-pic
make -j $(nproc)
sudo make install
sudo ldconfig
sudo ldconfig -p | grep x264
        libx264.so.164 (libc6,x86-64) => /usr/local/lib/libx264.so.164
        libx264.so.163 (libc6,x86-64) => /lib/x86_64-linux-gnu/libx264.so.163
        libx264.so (libc6,x86-64) => /usr/local/lib/libx264.so
ldd $(which ffmpeg) | grep x264
        libx264.so.164 => /usr/local/lib/libx264.so.164 (0x00007f0dc581f000)

I can get ffmpeg to use the x264 build I have, but I can't seem to get this bindgen to work..

git clone https://git.ffmpeg.org/ffmpeg.git
cd ffmpeg
git checkout release/7.0
./configure --pkg-config-flags="--static" \                                                      
    --enable-static \
    --enable-shared \
    --enable-gpl \
    --enable-libx264 \
    --enable-libdav1d \
    --enable-libopus \
    --enable-libmp3lame \
    --enable-libwebp
make -j $(nproc)
sudo make install
ffmpeg -i ../test-h264.mp4 2>&1 | grep 'x264\|h264'
  configuration: --pkg-config-flags=--static --enable-static --enable-shared --enable-gpl --enable-libx264 --enable-libdav1d --enable-libopus --enable-libmp3lame --enable-libwebp
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '../test-h264.mp4':
  Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 480x360 [SAR 6:5 DAR 8:5], 272 kb/s, 29.98 fps, 30 tbr, 90k tbn (default)

any suggestions or pointers?

[giantcow]

I think I might have figured this out...

Remove all packaged libs

sudo apt remove libunistring-dev libaom-dev libdav1d-dev libx264-dev libwebp-dev libvorbis-dev libopus-dev libmp3lame-dev libdav1d-dev libavcodec-dev libavformat-dev libavutil-dev libavutil-dev libavformat-dev libavcodec-dev libavfilter-dev libswresample-dev libpostproc-dev libswscale-dev
sudo apt autoremove -y

Delete any manually-compiled/installed libs

sudo find /usr/ -iname '*libx264.*' -delete
sudo find /usr/ -iname '*libavcodec.*' -delete
sudo find /usr/ -iname '*libav*' -delete
sudo find /usr/ -iname '*libswresample.*' -delete
sudo find /usr/ -iname '*libswscale.*' -delete

Now, install x264 source

mkdir -p ~/ffmpeg-7
git clone --depth 1 https://code.videolan.org/videolan/x264.git && cd x264
./configure \
    --prefix=/home/kayo/ffmpeg-7 \
    --enable-shared \
    --enable-pic && \
    make -j $(nproc) && \
    make install
cd ..

Install FFMPEG-7.0 from source

git clone https://git.ffmpeg.org/ffmpeg.git ffmpeg && cd ffmpeg
git checkout release/7.0
LDFLAGS="-L/home/kayo/ffmpeg-7/lib -lx264" \
    ./configure \
    --prefix=/home/kayo/ffmpeg-7 \                                                                                 
    --enable-shared \
    --enable-static \
    --enable-gpl \
    --enable-libx264 && \
    make -j $(nproc) && \
    make install

Then build my project using this crate (ffmpeg-next)

cd ../<project>/
cargo clean
LD_LIBRARY_PATH="/home/kayo/ffmpeg-7/lib" \
FFMPEG_DIR="/home/kayo/ffmpeg-7" \
LDFLAGS="-L/home/kayo/ffmpeg-7/lib -lavcodec -lavdevice -lavfilter -lavformat -lavresample -lavutil" \
cargo build -vv

But I still seem to be running into the same error where the crate says there's no decoder found... I'm using the example code from the main repo..

LD_LIBRARY_PATH="/home/kayo/ffmpeg-7/lib" cargo run -- ../test-h264.mp4 
    Finished dev [unoptimized + debuginfo] target(s) in 0.01s
     Running `target/debug/ezv-core ../test-h264.mp4`
FFMPEG version: 3868772
FFMPEG config: --prefix=/home/kayo/ffmpeg-7 --enable-shared --enable-static --enable-gpl --enable-nonfree --enable-libx264
Args {
    inner: [
        "target/debug/ezv-core",
        "../test-h264.mp4",
    ],
}
No decoder found for ../test-h264.mp4
No encoder found for ../test-h264.mp4

It works if I use the same libs with the built ffmpeg binary:

LD_LIBRARY_PATH="/home/kayo/ffmpeg-7/lib" ~/ffmpeg-7/bin/ffmpeg -i ../test-h264.mp4 2>&1 | grep 'avc\|aac\|configuration\|version'
ffmpeg version n7.0-7-gd38bf5e08e Copyright (c) 2000-2024 the FFmpeg developers
  configuration: --prefix=/home/kayo/ffmpeg-7 --enable-shared --enable-static --enable-gpl --enable-nonfree --enable-libx264
  libavcodec     61.  3.100 / 61.  3.100
    minor_version   : 512
    compatible_brands: mp42iso2avc1mp41
  Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 480x360 [SAR 6:5 DAR 8:5], 272 kb/s, 29.98 fps, 30 tbr, 90k tbn (default)
  Stream #0:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 65 kb/s (default)

[giantcow]

Oh I should have looked at the FFMPEG docs first... this particular example/api wants the encoders name not the file :)

LD_LIBRARY_PATH="/home/kayo/ffmpeg-7/lib" cargo run -- h264                          
    Finished dev [unoptimized + debuginfo] target(s) in 0.01s
     Running `target/debug/ezv-core h264`
FFMPEG version: 3868772
FFMPEG config: --prefix=/home/kayo/ffmpeg-7 --enable-shared --enable-static --enable-gpl --enable-nonfree --enable-libx264
Args {
    inner: [
        "target/debug/ezv-core",
        "h264",
    ],
}
type: decoder
         id: H264
         name: h264
         description: H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
         medium: Video
         capabilities: Capabilities(DR1 | DELAY | FRAME_THREADS | SLICE_THREADS)
         profiles: [H264(Baseline), H264(ConstrainedBaseline), H264(Main), H264(Extended), H264(High), H264(High10), H264(High10Intra), H264(High422), H264(High422Intra), H264(High444), H264(High444Predictive), H264(High444Intra), H264(CAVLC444), Unknown, Unknown]
         rates: any
         formats: any
         max_lowres: 0
No encoder found for h264

[giantcow]

One note in case this helps anyone in the future; I didn't enable any feature flags. This prevents the rust-ffmpeg-sys package from trying to build FFMPEG itself and allowed me to configure it as I wanted.

[dependencies]
ffmpeg-next = "7.0.0"