Add Konverter: a local-only menu bar file converter
Drag files in Finder, hold a modifier, and drop on a wheel of outputs. Conversions run entirely on-device through ImageIO, PDFKit, AVFoundation, the bundled CLI tools, and optional ffmpeg/LibreOffice. Includes a --self-test suite (41 checks) and a --convert CLI mode so the conversion matrix can be verified without the UI.
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import AVFoundation
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import CoreMedia
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import Foundation
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/// Video and audio tools. Where AVFoundation cannot express an edit (loudness
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/// normalisation, silence ranges, bitrate targets) ffmpeg is used instead.
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enum MediaTools {
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static func compressVideo(_ source: URL, at destination: URL, quality: String) throws {
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if Toolchain.hasFFmpeg, Settings.shared.useExternalTools {
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let crf = quality == "Low" ? "30" : (quality == "High" ? "21" : "26")
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try FFmpeg.filter(
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source: source,
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at: destination,
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arguments: ["-c:v", "libx264", "-preset", "slow", "-crf", crf, "-c:a", "aac", "-b:a", "128k"]
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)
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return
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}
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try AVConverter.convert(source: source, to: destination.pathExtension == "mov" ? .mov : .mp4, at: destination, quality: quality)
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}
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static func normalizeAudio(_ source: URL, at destination: URL) throws {
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try FFmpeg.filter(
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source: source,
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at: destination,
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arguments: ["-af", "loudnorm=I=-16:TP=-1.5:LRA=11", "-c:a", codecForContainer(destination)]
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)
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}
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static func channels(_ source: URL, at destination: URL, mono: Bool) throws {
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if Toolchain.hasFFmpeg, Settings.shared.useExternalTools {
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try FFmpeg.filter(
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source: source,
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at: destination,
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arguments: ["-ac", mono ? "1" : "2", "-c:a", codecForContainer(destination)]
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)
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return
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}
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try CoreAudio.remix(source: source, at: destination, mono: mono)
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}
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static func bleep(_ source: URL, at destination: URL, start: Double, end: Double) throws {
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let filter = "volume=enable='between(t,\(start),\(end))':volume=0"
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try FFmpeg.filter(
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source: source,
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at: destination,
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arguments: ["-af", filter, "-c:a", codecForContainer(destination)]
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)
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}
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static func compressAudio(_ source: URL, at destination: URL, bitrate: String) throws {
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guard let format = FileKind.format(of: destination) else {
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throw ConversionError.failed("Unknown audio container.")
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}
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try FFmpeg.convert(source: source, to: format, at: destination, bitrate: bitrate)
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}
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/// Audio edits keep the source container where possible so the output name
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/// and the file itself stay recognisable.
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static func audioSibling(for source: URL, suffix: String, forcing format: Format? = nil) -> URL {
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let resolved = format ?? FileKind.format(of: source) ?? .m4a
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return OutputNaming.sibling(for: source, suffix: suffix, extension: resolved.ext)
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}
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private static func codecForContainer(_ url: URL) -> String {
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switch FileKind.canonicalExtension(url.pathExtension) {
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case "mp3": return "libmp3lame"
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case "ogg": return "libvorbis"
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case "opus": return "libopus"
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case "flac": return "flac"
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case "wav": return "pcm_s16le"
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case "aiff": return "pcm_s16be"
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case "wma": return "wmav2"
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case "caf": return "pcm_s16le"
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default: return "aac"
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}
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}
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}
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/// Serialisable, human readable descriptions for the info tools.
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enum MediaInfo {
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static func describe(_ url: URL) -> String {
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switch FileKind.category(of: url) {
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case .image: return describeImage(url)
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case .video, .audio: return describeMedia(url)
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case .pdf: return describePDF(url)
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case .archive: return describeArchive(url)
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case .spreadsheet, .document, .ebook, .subtitle: return describeText(url)
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default: return describeFile(url)
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}
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}
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static func describeFile(_ url: URL) -> String {
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describeFileBasics(url).joined(separator: "\n")
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}
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private static func describeFileBasics(_ url: URL) -> [String] {
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var lines: [String] = ["Name: \(url.lastPathComponent)"]
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let values = try? url.resourceValues(forKeys: [.fileSizeKey, .creationDateKey, .contentModificationDateKey])
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if let size = values?.fileSize {
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lines.append("Size: \(ByteCountFormatter.string(fromByteCount: Int64(size), countStyle: .file))")
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}
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if let created = values?.creationDate {
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lines.append("Created: \(DateFormatter.localizedString(from: created, dateStyle: .medium, timeStyle: .short))")
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}
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if let modified = values?.contentModificationDate {
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lines.append("Modified: \(DateFormatter.localizedString(from: modified, dateStyle: .medium, timeStyle: .short))")
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}
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return lines
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}
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private static func describeImage(_ url: URL) -> String {
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var lines = describeFileBasics(url)
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guard let source = Raster.imageSource(at: url) else { return lines.joined(separator: "\n") }
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let properties = CGImageSourceCopyPropertiesAtIndex(source, 0, nil) as? [CFString: Any] ?? [:]
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if let width = properties[kCGImagePropertyPixelWidth] as? Int,
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let height = properties[kCGImagePropertyPixelHeight] as? Int {
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lines.append("Dimensions: \(width) × \(height)")
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}
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if let dpiWidth = properties[kCGImagePropertyDPIWidth] as? Double {
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lines.append("Resolution: \(Int(dpiWidth)) dpi")
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}
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if let colorModel = properties[kCGImagePropertyColorModel] as? String {
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lines.append("Color: \(colorModel)")
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}
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if properties[kCGImagePropertyGIFDictionary] != nil {
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lines.append("Format: animated GIF")
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}
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if let exif = properties[kCGImagePropertyExifDictionary] as? [CFString: Any] {
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if let date = exif[kCGImagePropertyExifDateTimeOriginal] as? String {
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lines.append("Captured: \(date)")
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}
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}
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if let tiff = properties[kCGImagePropertyTIFFDictionary] as? [CFString: Any] {
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if let make = tiff[kCGImagePropertyTIFFMake] as? String,
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let model = tiff[kCGImagePropertyTIFFModel] as? String {
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lines.append("Camera: \(make) \(model)")
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}
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}
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if let gps = properties[kCGImagePropertyGPSDictionary] as? [CFString: Any],
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let latitude = gps[kCGImagePropertyGPSLatitude] as? Double,
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let longitude = gps[kCGImagePropertyGPSLongitude] as? Double {
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lines.append("Location: \(String(format: "%.4f", latitude)), \(String(format: "%.4f", longitude))")
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}
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lines.append("Frames: \(Raster.frameCount(at: url))")
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return lines.joined(separator: "\n")
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}
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private static func describeMedia(_ url: URL) -> String {
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var lines = describeFileBasics(url)
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let asset = AVURLAsset(url: url)
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let duration = CMTimeGetSeconds(asset.duration)
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if duration.isFinite, duration > 0 {
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let minutes = Int(duration) / 60
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let remaining = duration - Double(minutes * 60)
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lines.append("Duration: \(minutes):\(String(format: "%05.2f", remaining))")
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}
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for track in asset.tracks {
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switch track.mediaType {
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case .video:
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let size = track.naturalSize.applying(track.preferredTransform)
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let frameRate = track.nominalFrameRate
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lines.append("Video: \(Int(abs(size.width)))×\(Int(abs(size.height))) @ \(String(format: "%.2f", frameRate)) fps")
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lines.append("Codec: \(codecName(track) ?? "unknown")")
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case .audio:
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let rate = track.nominalFrameRate
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lines.append("Audio: \(codecName(track) ?? "unknown") @ \(Int(rate)) Hz")
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default:
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break
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}
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}
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if let ffprobe = Toolchain.ffprobe,
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let output = Shell.output(ffprobe, ["-v", "error", "-show_entries", "format=bit_rate:stream=bit_rate", "-of", "default=nw=1", url.path]) {
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let rates = output.split(separator: "\n").compactMap { $0.split(separator: "=").last }.compactMap { Int($0) }.filter { $0 > 0 }
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if let bitrate = rates.first {
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lines.append("Bitrate: \(bitrate / 1000) kbps")
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}
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}
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return lines.joined(separator: "\n")
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}
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private static func codecName(_ track: AVAssetTrack) -> String? {
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guard let raw = track.formatDescriptions.first else { return nil }
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let description = raw as! CMFormatDescription
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return describeFormat(description)
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}
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private static func describeFormat(_ description: CMFormatDescription) -> String? {
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let codec = CMFormatDescriptionGetMediaSubType(description)
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let bytes = [
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UInt8((codec >> 24) & 0xFF), UInt8((codec >> 16) & 0xFF),
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UInt8((codec >> 8) & 0xFF), UInt8(codec & 0xFF)
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]
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let name = String(bytes: bytes, encoding: .ascii)?.trimmingCharacters(in: .whitespaces)
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return name?.isEmpty == false ? name : nil
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}
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private static func describePDF(_ url: URL) -> String {
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var lines = describeFileBasics(url)
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lines.append("Pages: \(PDFConverter.pageCount(url))")
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if let size = PDFConverter.pageSize(url) {
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lines.append("Page size: \(Int(size.width)) × \(Int(size.height)) pt")
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}
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let text = PDFConverter.extractText(url)
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lines.append("Words: \(text.split { $0 == " " || $0.isNewline }.count)")
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return lines.joined(separator: "\n")
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}
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private static func describeArchive(_ url: URL) -> String {
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var lines = describeFileBasics(url)
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let listing = (try? ArchiveConverter.list(url)) ?? ""
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let entries = listing.split(separator: "\n").count
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lines.append("Entries: \(entries)")
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return lines.joined(separator: "\n")
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}
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private static func describeText(_ url: URL) -> String {
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var lines = describeFileBasics(url)
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let text = TextDocument.plainText(from: url) ?? ""
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let words = text.split { $0 == " " || $0.isNewline }.count
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lines.append("Words: \(words)")
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lines.append("Characters: \(text.count)")
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lines.append("Lines: \(text.components(separatedBy: "\n").count)")
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return lines.joined(separator: "\n")
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}
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}
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