Fails to build with FFmpeg 8.0 (-DUSE_SYSTEM_FFMPEG=ON)

[jbeich]

Quick summary

FFmpeg 8.0 was released on 2025-08-22, so some distros are working on updating the package.

$ cmake -G Ninja -B _build -DUSE_SYSTEM_FFMPEG=ON
$ cmake --build _build
[...]
rpcs3/Emu/Cell/Modules/cellAtracXdec.cpp:114:33: error: use of undeclared identifier 'AV_CODEC_CAP_SUBFRAMES'
  114 |         ensure(!(codec->capabilities & AV_CODEC_CAP_SUBFRAMES));
      |                                        ^
rpcs3/Emu/Cell/Modules/cellAtracXdec.cpp:159:16: error: use of undeclared identifier 'avcodec_close'
  159 |         if (int err = avcodec_close(ctx); err)
      |                       ^

References

• AV_CODEC_CAP_SUBFRAMES: deprecation, removal
• avcodec_close: deprecation, removal