28 lines
921 B
Elixir
28 lines
921 B
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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@ffmpeg_opts [{:sync, true}, {:stdout, true}]
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def ffmpeg_resize_remote(uri, %{max_width: max_width, max_height: max_height}) do
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cmd = ~s"""
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curl -L "#{uri}" |
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ffmpeg -i pipe:0 -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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-f image2 -vcodec mjpeg -frames:v 1 pipe:1 | \
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cat
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"""
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with {:ok, [stdout: stdout_list]} <- Exexec.run(cmd, @ffmpeg_opts) do
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{:ok, Enum.join(stdout_list)}
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end
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end
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end
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