Unable to Install av==14.1.0 on PyPy

[Pandede]

I encountered an issue when attempting to install av==14.1.0 on PyPy using the Docker image pypy:3.10-7.3.18-slim. The installation fails due to missing FFmpeg-related libraries. Below is the error message:

root@843a419cf3b1:/# pip install av==14.1.0
Collecting av==14.1.0
  Using cached av-14.1.0.tar.gz (4.0 MB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... error
  error: subprocess-exited-with-error

  × Getting requirements to build wheel did not run successfully.
  │ exit code: 1
  ╰─> [29 lines of output]
      Package libavformat was not found in the pkg-config search path.
      Perhaps you should add the directory containing `libavformat.pc`
      to the PKG_CONFIG_PATH environment variable
      No package 'libavformat' found
      Package libavcodec was not found in the pkg-config search path.
      Perhaps you should add the directory containing `libavcodec.pc`
      to the PKG_CONFIG_PATH environment variable
      No package 'libavcodec' found
      Package libavdevice was not found in the pkg-config search path.
      Perhaps you should add the directory containing `libavdevice.pc`
      to the PKG_CONFIG_PATH environment variable
      No package 'libavdevice' found
      Package libavutil was not found in the pkg-config search path.
      Perhaps you should add the directory containing `libavutil.pc`
      to the PKG_CONFIG_PATH environment variable
      No package 'libavutil' found
      Package libavfilter was not found in the pkg-config search path.
      Perhaps you should add the directory containing `libavfilter.pc`
      to the PKG_CONFIG_PATH environment variable
      No package 'libavfilter' found
      Package libswscale was not found in the pkg-config search path.
      Perhaps you should add the directory containing `libswscale.pc`
      to the PKG_CONFIG_PATH environment variable
      No package 'libswscale' found
      Package libswresample was not found in the pkg-config search path.
      Perhaps you should add the directory containing `libswresample.pc`
      to the PKG_CONFIG_PATH environment variable
      No package 'libswresample' found
      pkg-config could not find libraries ['avformat', 'avcodec', 'avdevice', 'avutil', 'avfilter', 'swscale', 'swresample']
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
error: subprocess-exited-with-error

× Getting requirements to build wheel did not run successfully.
│ exit code: 1
╰─> See above for output.

note: This error originates from a subprocess, and is likely not a problem with pip.

Downgrading to av==14.0.1 works without issues.