H.264 encoder taking advantage of hardware acceleration provided by Vulkan video extensions.

Element options

Passed via struct Membrane.VKVideo.Encoder.t/0

• tune

  :low_latency | :high_quality

  Default value: :low_latency
  Specifies whether the encoder should be optimized for minimal latency (which is important in case of livestreams) or for higher quality (applicable to offline encoding).

• approx_framerate

  {non_neg_integer(), pos_integer()} | nil

  Default value: nil
  Framerate of the stream expressed in number of frames per second. It's only used by the rate control mechanism and therefore it does not need to be an exact value. If nil, the framerate will be read from the stream format's structure or set to fixed value of 30 frames per second if framerate is not provided by the stream format.

• rate_control

  :encoder_default
  | :disabled
  | {:variable_bitrate, __MODULE__.VariableBitrate.t()}
  | {:constant_bitrate, __MODULE__.ConstantBitrate.t()}

  Default value: :encoder_default
  Specifies which rate control mechanism should by used by the encoder.

Pads

:input

Accepted formats:

%Membrane.RawVideo{pixel_format: :NV12}

:output

Accepted formats:

%Membrane.H264{stream_structure: :annexb, alignment: :au}