# frozen_string_literal: true module ActiveStorage class Previewer::VideoPreviewer < Previewer def self.accept?(blob) blob.video? end def preview download_blob_to_tempfile do |input| draw_relevant_frame_from input do |output| yield io: output, filename: "#{blob.filename.base}.jpg", content_type: "image/jpeg" end end end private def draw_relevant_frame_from(file, &block) draw ffmpeg_path, "-i", file.path, "-y", "-vframes", "1", "-f", "image2", "-", &block end def ffmpeg_path ActiveStorage.paths[:ffmpeg] || "ffmpeg" end end end