[vpx_plugin] VP8 Encoder causes significant quality loss

Using Membrane.VP8.Encoder causes significant quality loss

Example pipeline:

defmodule TransmuxingPipeline do
  use Membrane.Pipeline

  @impl true
  def handle_init(_ctx, _options) do
    priv = "#{__DIR__}/../../priv/" |> Path.expand()
    mp4_path = Path.join(priv, "fixtures/bunny_without_sound.mp4")
    mkv_path = Path.join(priv, "outputs/bunny_without_sound.mkv")

    spec = [
      child(:source, %Membrane.File.Source{location: mp4_path})
      |> child(:mp4_demuxer, Membrane.MP4.Demuxer.ISOM)
      |> via_out(:output, options: [kind: :video])
      |> child(:h264_parser_1, %Membrane.H264.Parser{output_stream_structure: :annexb})
      |> child(:h264_decoder, Membrane.H264.FFmpeg.Decoder)
      |> child(:vp8_encoder, %Membrane.VP8.Encoder{encoding_deadline: 200})
      |> child(:matroska_muxer, Membrane.Matroska.Muxer)
      |> child(:file_sink, %Membrane.File.Sink{location: mkv_path})
    ]

    {[spec: spec], %{}}
  end

  @impl true
  def handle_element_end_of_stream(:file_sink, _input, _ctx, state) do
    {[terminate: :normal], state}
  end

  @impl true
  def handle_element_end_of_stream(_element, _input, _ctx, state), do: {[], state}
end

membraneframework / membrane_core

[vpx_plugin] VP8 Encoder causes significant quality loss #841