```
meson --prefix=/usr out
cd out
ninja
sudo ninja install
```

```
/usr/local/lib/x86_64-linux-gnu/libopenh264.so
Installing /home/fuqiang/workspace/spacemit_mpp/thirdparty/openh264/codec/api/wels/codec_api.h to /usr/local/include/wels
Installing /home/fuqiang/workspace/spacemit_mpp/thirdparty/openh264/codec/api/wels/codec_app_def.h to /usr/local/include/wels
Installing /home/fuqiang/workspace/spacemit_mpp/thirdparty/openh264/codec/api/wels/codec_def.h to /usr/local/include/wels
Installing /home/fuqiang/workspace/spacemit_mpp/thirdparty/openh264/codec/api/wels/codec_ver.h to /usr/local/include/wels
```