33 lines
1.1 KiB
Elixir
33 lines
1.1 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Helpers.MediaHelper do
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@moduledoc """
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Handles common media-related operations.
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"""
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def ffmpeg_resize(uri_or_path, %{max_width: max_width, max_height: max_height} = options) do
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quality = options[:quality] || 1
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cmd = ~s"""
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ffmpeg -i #{uri_or_path} -f lavfi -i color=c=white \
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-filter_complex "[0:v] scale='min(#{max_width},iw)':'min(#{max_height},ih)': \
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force_original_aspect_ratio=decrease [scaled]; \
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[1][scaled] scale2ref [bg][img]; [bg] setsar=1 [bg]; [bg][img] overlay=shortest=1" \
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-loglevel quiet -f image2 -vcodec mjpeg -frames:v 1 -q:v #{quality} pipe:1
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"""
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pid = Port.open({:spawn, cmd}, [:use_stdio, :in, :stream, :exit_status, :binary])
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receive do
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{^pid, {:data, data}} ->
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send(pid, {self(), :close})
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{:ok, data}
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{^pid, {:exit_status, status}} when status > 0 ->
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{:error, status}
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end
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end
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end
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