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membrane_h264_ffmpeg_plugin
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Membrane H264 decoder and encoder based on FFmpeg and x264
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lib/membrane_h264_ffmpeg/common.ex
defmodule Membrane.H264.FFmpeg.Common do
@moduledoc false
use Ratio
@h264_time_base 90_000
@doc """
Decoder and encoder requires timestamps in h264 time base, that is 1/90_000 [s]
timestamps produced by this function are passed to the decoder so
they must be integers.
"""
@spec to_h264_time_base(number | Ratio.t()) :: integer
def to_h264_time_base(timestamp) do
(timestamp * @h264_time_base / Membrane.Time.second()) |> Ratio.trunc()
end
@doc """
All timestamps in membrane should be represented in the internal units, that is 1 [ns]
this function can return rational number.
"""
@spec to_membrane_time_base(number | Ratio.t()) :: number | Ratio.t()
def to_membrane_time_base(timestamp) do
timestamp * Membrane.Time.second() / @h264_time_base
end
end