if (ENABLE_VIDEO OR ENABLE_WEB_AUDIO)

    if (PORT STREQUAL "WPE")
        find_package(WPEBackend_fdo 1.9.0)
        if ((NOT WPEBACKEND_FDO_FOUND) OR WPEBACKEND_FDO_AUDIO_EXTENSION STREQUAL "WPEBACKEND_FDO_AUDIO_EXTENSION-NOTFOUND")
            message(WARNING "WPEBackend-fdo audio extension not found. Disabling external audio rendering support")
            SET_AND_EXPOSE_TO_BUILD(USE_WPEBACKEND_FDO_AUDIO_EXTENSION FALSE)
        else ()
            SET_AND_EXPOSE_TO_BUILD(USE_WPEBACKEND_FDO_AUDIO_EXTENSION TRUE)
        endif ()
    endif ()

    SET_AND_EXPOSE_TO_BUILD(USE_GSTREAMER TRUE)
      if (USE_GSTREAMER_FULL)
          find_package(GStreamer 1.20.0 REQUIRED COMPONENTS full)
          if (NOT PC_GSTREAMER_FULL_FOUND)
              message(FATAL_ERROR "GStreamer static library libgstreamer-full-1.0 not found")
          else ()
              SET_AND_EXPOSE_TO_BUILD(USE_GSTREAMER_FULL TRUE)
          endif ()
      else ()
          set(GSTREAMER_COMPONENTS app pbutils)
          if (ENABLE_VIDEO)
              list(APPEND GSTREAMER_COMPONENTS video mpegts tag gl)
          endif ()

          if (ENABLE_WEB_AUDIO)
              list(APPEND GSTREAMER_COMPONENTS audio fft)
          endif ()

          if (ENABLE_MEDIA_RECORDER)
              list(APPEND GSTREAMER_COMPONENTS transcoder)
          endif ()

          if (USE_GSTREAMER_WEB_RTC)
              list(APPEND GSTREAMER_COMPONENTS webrtc)
          endif ()

          find_package(GStreamer 1.14.0 REQUIRED COMPONENTS ${GSTREAMER_COMPONENTS})

          if (ENABLE_WEB_AUDIO)
              if (NOT PC_GSTREAMER_AUDIO_FOUND OR NOT PC_GSTREAMER_FFT_FOUND)
                  message(FATAL_ERROR "WebAudio requires the audio and fft GStreamer libraries. Please check your gst-plugins-base installation.")
              endif ()
          endif ()

          if (ENABLE_VIDEO)
              if (NOT PC_GSTREAMER_APP_FOUND OR NOT PC_GSTREAMER_PBUTILS_FOUND OR NOT PC_GSTREAMER_TAG_FOUND OR NOT PC_GSTREAMER_VIDEO_FOUND)
                  message(FATAL_ERROR "Video playback requires the following GStreamer libraries: app, pbutils, tag, video. Please check your gst-plugins-base installation.")
              endif ()
          endif ()

          if (USE_GSTREAMER_MPEGTS AND NOT PC_GSTREAMER_MPEGTS_FOUND)
              message(FATAL_ERROR "GStreamer MPEG-TS is needed for USE_GSTREAMER_MPEGTS.")
          endif ()

          if (USE_GSTREAMER_GL AND NOT PC_GSTREAMER_GL_FOUND)
              message(FATAL_ERROR "GStreamerGL is needed for USE_GSTREAMER_GL.")
          endif ()

          if (ENABLE_MEDIA_RECORDER AND USE_GSTREAMER_TRANSCODER AND (NOT PC_GSTREAMER_TRANSCODER_FOUND OR PC_GSTREAMER_TRANSCODER_VERSION VERSION_LESS "1.20"))
              message(FATAL_ERROR "GStreamerTranscoder >= 1.20 is needed for USE_GSTREAMER_TRANSCODER.")
          endif ()

          if (USE_GSTREAMER_WEBRTC AND (PC_GSTREAMER_VERSION VERSION_LESS "1.20" OR NOT PC_GSTREAMER_WEBRTC_FOUND))
              message(FATAL_ERROR "GStreamerWebRTC >= 1.20 is needed for USE_GSTREAMER_WEBRTC.")
          endif ()
      endif ()
endif ()

if (ENABLE_MEDIA_STREAM AND ENABLE_WEB_RTC)
    if (USE_GSTREAMER_WEBRTC)
        SET_AND_EXPOSE_TO_BUILD(USE_LIBWEBRTC FALSE)

        find_package(OpenSSL)
        if (NOT OPENSSL_FOUND)
            message(FATAL_ERROR "OpenSSL is needed for USE_GSTREAMER_WEBRTC.")
        endif ()
    else ()
        SET_AND_EXPOSE_TO_BUILD(USE_LIBWEBRTC TRUE)
    endif ()
else ()
    SET_AND_EXPOSE_TO_BUILD(USE_LIBWEBRTC FALSE)
endif ()