Extensive testing methodology rework
This commit is contained in:
Samuele Lorefice
@@ -1,84 +1,139 @@
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using System;
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using System.Diagnostics;
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using System.Text;
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using EncodingSampleTest;
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using FFMpegCore;
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using FFMpegCore.Enums;
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const int MAX_JOBS = 8;
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string ffmpegPath = Path.Combine(Environment.CurrentDirectory, "vendor");
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string tempPath = Path.Combine(Environment.CurrentDirectory, "tmp");
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string outputDir = Path.Combine(Environment.CurrentDirectory, "output");
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const string inputFile = "testVid.mp4";
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Directory.CreateDirectory(outputDir);
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Directory.CreateDirectory(tempPath);
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const string inputFile = "testVid.mp4";
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const int MAX_JOBS = 3;
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const string tableHeader = "Width\tHeight\tPreset\tCRF\tSize Ratio\tEncode Time\tSpeed\tVMAF\n";
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StringBuilder AV1GPUStats = new(tableHeader);
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StringBuilder HEVCGPUStats = new(tableHeader);
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StringBuilder H264GPUStats = new(tableHeader);
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StringBuilder AV1CPUStats = new(tableHeader);
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StringBuilder HEVCCPUStats = new(tableHeader);
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StringBuilder H264CPUStats = new(tableHeader);
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GlobalFFOptions.Configure(options => {
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options.BinaryFolder = ffmpegPath;
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options.TemporaryFilesFolder = tempPath;
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options.UseCache = true;
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});
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if(!File.Exists(inputFile)) return;
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var originalFile = new FileInfo(inputFile);
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var mediaInfo = FFProbe.Analyse(inputFile);
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if (mediaInfo.PrimaryVideoStream == null) {
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Console.WriteLine("No video stream found.");
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return;
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}
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var W = mediaInfo.PrimaryVideoStream.Width / 2;
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var H = mediaInfo.PrimaryVideoStream.Height / 2;
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var W = mediaInfo.PrimaryVideoStream.Width;
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var H = mediaInfo.PrimaryVideoStream.Height;
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Queue<Task> GpuEncodingTasks = new();
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List<Task> GpuTasks = new();
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List<Task> CpuTasks = new();
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CancellationTokenSource cancellationTokenSource = new CancellationTokenSource();
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CancellationToken cancellationToken = cancellationTokenSource.Token;
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for (int cq = 24; cq <= 34; cq += 2) {
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GpuEncodingTasks.Enqueue(Encode(Encoder.AV1_NVENC, 1920, 1080, cq, cancellationToken));
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GpuEncodingTasks.Enqueue(Encode(Encoder.HEVC_NVENC, 1920, 1080, cq, cancellationToken));
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GpuEncodingTasks.Enqueue(Encode(Encoder.H264_NVENC, 1920, 1080, cq, cancellationToken));
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CpuTasks.Add(Encode(Encoder.AV1_CPU, 1920, 1080, cq, cancellationToken));
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CpuTasks.Add(Encode(Encoder.HEVC_CPU, 1920, 1080, cq, cancellationToken));
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CpuTasks.Add(Encode(Encoder.H264_CPU, 1920, 1080, cq, cancellationToken));
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}
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//Run all GPU tasks sequentially
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while (GpuEncodingTasks.Count > 0) {
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var task = GpuEncodingTasks.Dequeue();
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try {
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task.RunSynchronously();
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} catch (Exception ex) {
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Console.WriteLine($"Error during GPU encoding: {ex.Message}");
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Console.WriteLine("Generating Tasks:");
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for (int cq = 24; cq <= 34; cq += 3) {
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for (int preset = 12; preset <= 18; preset+=3) {
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GpuTasks.Add(Encode(Encoder.AV1_NVENC, 1280, 720, cq, preset, cancellationToken));
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GpuTasks.Add(Encode(Encoder.AV1_NVENC, 1920, 1080, cq, preset, cancellationToken));
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GpuTasks.Add(Encode(Encoder.AV1_NVENC, W, H, cq, preset, cancellationToken));
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GpuTasks.Add(Encode(Encoder.HEVC_NVENC, 1280, 720, cq, preset, cancellationToken));
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GpuTasks.Add(Encode(Encoder.HEVC_NVENC, 1920, 1080, cq, preset, cancellationToken));
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GpuTasks.Add(Encode(Encoder.HEVC_NVENC, W, H, cq, preset, cancellationToken));
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GpuTasks.Add(Encode(Encoder.H264_NVENC, 1280, 720, cq, preset, cancellationToken));
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GpuTasks.Add(Encode(Encoder.H264_NVENC, 1920, 1080, cq, preset, cancellationToken));
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GpuTasks.Add(Encode(Encoder.H264_NVENC, W, H, cq, preset, cancellationToken));
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}
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for (int preset = 4; preset <= 7; preset++) {
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CpuTasks.Add(Encode(Encoder.AV1_CPU, 1280, 720, cq, preset, cancellationToken));
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CpuTasks.Add(Encode(Encoder.AV1_CPU, 1920, 1080, cq, preset, cancellationToken));
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CpuTasks.Add(Encode(Encoder.AV1_CPU, W, H, cq, preset, cancellationToken));
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}
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for (int preset = 3; preset <= 5; preset++) {
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CpuTasks.Add(Encode(Encoder.HEVC_CPU, 1280, 720, cq, preset, cancellationToken));
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CpuTasks.Add(Encode(Encoder.HEVC_CPU, 1920, 1080, cq, preset, cancellationToken));
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CpuTasks.Add(Encode(Encoder.HEVC_CPU, W, H, cq, preset, cancellationToken));
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CpuTasks.Add(Encode(Encoder.H264_CPU, 1280, 720, cq, preset, cancellationToken));
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CpuTasks.Add(Encode(Encoder.H264_CPU, 1920, 1080, cq, preset, cancellationToken));
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CpuTasks.Add(Encode(Encoder.H264_CPU, W, H, cq, preset, cancellationToken));
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}
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}
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//Run all CPU tasks in parallel
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try {
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while (CpuTasks.Count > 0) {
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var runningTasks = CpuTasks.Take(MAX_JOBS).ToList();
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CpuTasks = CpuTasks.Skip(MAX_JOBS).ToList();
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await Task.WhenAll(runningTasks);
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//Run all GPU tasks sequentially
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while (GpuTasks.Count(x => x.IsCompleted) < GpuTasks.Count) {
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GpuTasks.First(x => !x.IsCompleted).RunSynchronously();
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Console.WriteLine(GpuTasks.Count(x => !x.IsCompleted) + " GPU tasks remaining...");
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}
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//Run all CPU tasks sequentially
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while (CpuTasks.Count(x => x.IsCompleted) < CpuTasks.Count) {
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CpuTasks.First(x => !x.IsCompleted).RunSynchronously();
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Console.WriteLine(CpuTasks.Count(x => !x.IsCompleted) + " CPU tasks remaining...");
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}
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//Calculate VMAF score in parallel
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Dictionary<EncodeStats,Task<float>> vmafResults = new();
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var tasks = GpuTasks.Concat(CpuTasks).OfType<Task<EncodeStats>>().Select(x => x.Result).ToList();
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while (tasks.Count > 0) {
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var vmafTasks = tasks.Take(MAX_JOBS);
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tasks = tasks.Skip(MAX_JOBS).ToList();
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foreach (var task in vmafTasks)
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vmafResults.Add(task, ComputeVMAFScore(inputFile, task.Filename));
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Task.WhenAll(vmafResults.Values).Wait();
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Console.WriteLine(tasks.Count + " VMAF tasks remaining...");
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}
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Console.WriteLine("Computing Results:");
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foreach (var result in vmafResults) {
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//"Width\tHeight\tPreset\tCRF\tSize Ratio\tEncode Time\tSpeed\n";
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var es = result.Key;
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string line = $"{es.Width}\t{es.Height}\t{es.preset}\t{es.CRF}\t{es.SizeRatio:F3}\t{es.EncodeTime:g}\t"+
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$"{(es.EncodeTime.TotalSeconds / mediaInfo.Duration.TotalSeconds):F3}x\t{result.Value.Result:F2}\n";
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Console.WriteLine(line);
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switch (es.EncoderType) {
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case Encoder.AV1_NVENC: AV1GPUStats.Append(line); break;
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case Encoder.HEVC_NVENC: HEVCGPUStats.Append(line); break;
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case Encoder.H264_NVENC: H264GPUStats.Append(line); break;
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case Encoder.AV1_CPU: AV1CPUStats.Append(line); break;
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case Encoder.HEVC_CPU: HEVCCPUStats.Append(line); break;
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case Encoder.H264_CPU: H264CPUStats.Append(line); break;
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}
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await Task.WhenAll(CpuTasks);
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}
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catch (Exception ex) {
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Console.WriteLine($"Error during CPU encoding: {ex.Message}");
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}
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File.WriteAllText(Path.Combine(outputDir, "AV1_NVENC_Stats.tsv"), AV1GPUStats.ToString());
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File.WriteAllText(Path.Combine(outputDir, "HEVC_NVENC_Stats.tsv"), HEVCGPUStats.ToString());
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File.WriteAllText(Path.Combine(outputDir, "H264_NVENC_Stats.tsv"), H264GPUStats.ToString());
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File.WriteAllText(Path.Combine(outputDir, "AV1_CPU_Stats.tsv"), AV1CPUStats.ToString());
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File.WriteAllText(Path.Combine(outputDir, "HEVC_CPU_Stats.tsv"), HEVCCPUStats.ToString());
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File.WriteAllText(Path.Combine(outputDir, "H264_CPU_Stats.tsv"), H264CPUStats.ToString());
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cancellationTokenSource.Cancel();
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return;
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Task Encode(Encoder encoder, int W = -1, int H = -1, int CQ = 23, CancellationToken cancellationToken = default) {
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var outputFile = Path.Combine(outputDir, $"output_{encoder}-{W}x{H}_cq{CQ}.mp4");
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if (File.Exists(outputFile) && new FileInfo(outputFile).Length > 0) {
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Console.WriteLine($"Skipping existing file {outputFile}");
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return Task.CompletedTask;
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}
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Task<EncodeStats> Encode(Encoder encoder, int W = -1, int H = -1, int CQ = 23, int preset = 0, CancellationToken cancellationToken = default) {
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var outputFile = Path.Combine(outputDir, $"output_{encoder}-{W}x{H}_p{preset}_cq{CQ}.mp4");
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FFMpegArgumentProcessor ffmpegArgs = encoder switch {
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Encoder.AV1_NVENC => AV1Encode( outputFile, W, H, CQ),
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Encoder.HEVC_NVENC => HEVCEncode( outputFile, W, H, CQ),
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Encoder.H264_NVENC => H264Encode( outputFile, W, H, CQ),
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Encoder.AV1_CPU => AV1EncodeCPU( outputFile, W, H, CQ),
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Encoder.HEVC_CPU => HEVCEncodeCPU( outputFile, W, H, CQ),
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Encoder.H264_CPU => H264EncodeCPU( outputFile, W, H, CQ),
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Encoder.AV1_NVENC => AV1Encode( outputFile, W, H, CQ, preset),
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Encoder.HEVC_NVENC => HEVCEncode( outputFile, W, H, CQ, preset),
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Encoder.H264_NVENC => H264Encode( outputFile, W, H, CQ, preset),
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Encoder.AV1_CPU => AV1EncodeCPU( outputFile, W, H, CQ, preset),
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Encoder.HEVC_CPU => HEVCEncodeCPU( outputFile, W, H, CQ, preset),
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Encoder.H264_CPU => H264EncodeCPU( outputFile, W, H, CQ, preset),
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_ => throw new ArgumentOutOfRangeException(nameof(encoder), encoder, null)
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};
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@@ -87,20 +142,33 @@ Task Encode(Encoder encoder, int W = -1, int H = -1, int CQ = 23, CancellationTo
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.CancellableThrough(cancellationToken);
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Console.WriteLine(ffmpegArgs.Arguments);
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return new Task<bool>(_ => {
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return new Task<EncodeStats>(_ => {
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Console.WriteLine("Starting encoding: " + outputFile);
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return ffmpegArgs.ProcessAsynchronously().Result;
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var sw = Stopwatch.StartNew();
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ffmpegArgs.ProcessSynchronously();
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sw.Stop();
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var fileSize = new FileInfo(outputFile).Length;
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return new EncodeStats() {
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Filename = outputFile,
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EncoderType = encoder,
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Width = W,
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Height = H,
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CRF = CQ,
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preset = preset,
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SizeRatio = originalFile.Length / (float)fileSize,
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EncodeTime = sw.Elapsed
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};
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}, cancellationToken);
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}
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FFMpegArgumentProcessor AV1Encode(string filePath, int W = -1, int H = -1, int CQ = 23) { // AV1 is visually lossless at CQ 23
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FFMpegArgumentProcessor AV1Encode(string filePath, int W = -1, int H = -1, int CQ = 23, int preset = 0) { // AV1 is visually lossless at CQ 23
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return FFMpegArguments
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.FromFileInput(inputFile, false, options => options.WithHardwareAcceleration())
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.OutputToFile(filePath, true, options => options
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.CopyChannel(Channel.Audio)
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.CopyChannel(Channel.Subtitle)
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.WithVideoCodec("av1_nvenc")
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.WithArgument(new NvencSpeedPreset(NvencSpeed.p7))
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.WithArgument(new NvencSpeedPreset((NvencSpeed)preset))
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.WithArgument(new NvencTuneArgument(NvencTune.hq))
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.WithArgument(new NvencHighBitDepthArgument(true))
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.WithCustomArgument("-rc vbr")
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@@ -110,14 +178,14 @@ FFMpegArgumentProcessor AV1Encode(string filePath, int W = -1, int H = -1, int C
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);
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}
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FFMpegArgumentProcessor HEVCEncode(string filePath, int W = -1, int H = -1, int CQ = 23) {
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FFMpegArgumentProcessor HEVCEncode(string filePath, int W = -1, int H = -1, int CQ = 23, int preset = 0) {
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return FFMpegArguments
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.FromFileInput(inputFile, true, options => options.WithHardwareAcceleration())
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.OutputToFile(filePath, true, options => options
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.CopyChannel(Channel.Audio)
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.CopyChannel(Channel.Subtitle)
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.WithVideoCodec("hevc_nvenc")
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.WithArgument(new NvencSpeedPreset(NvencSpeed.p7))
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.WithArgument(new NvencSpeedPreset((NvencSpeed)preset))
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.WithArgument(new NvencTuneArgument(NvencTune.hq))
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.WithCustomArgument("-rc vbr_hq")
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.WithCustomArgument($"-cq {(byte)CQ}")
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@@ -126,14 +194,14 @@ FFMpegArgumentProcessor HEVCEncode(string filePath, int W = -1, int H = -1, int
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);
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}
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FFMpegArgumentProcessor H264Encode(string filePath, int W = -1, int H = -1, int CQ = 23) {
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FFMpegArgumentProcessor H264Encode(string filePath, int W = -1, int H = -1, int CQ = 23, int preset = 0) {
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return FFMpegArguments
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.FromFileInput(inputFile, true, options => options.WithHardwareAcceleration())
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.OutputToFile(filePath, true, options => options
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.CopyChannel(Channel.Audio)
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.CopyChannel(Channel.Subtitle)
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.WithVideoCodec("h264_nvenc")
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.WithArgument(new NvencSpeedPreset(NvencSpeed.p7))
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.WithArgument(new NvencSpeedPreset((NvencSpeed)preset))
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.WithArgument(new NvencTuneArgument(NvencTune.hq))
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.WithCustomArgument("-rc vbr_hq")
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.WithCustomArgument($"-cq {(byte)CQ}") // approximate CRF to CQ
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@@ -142,14 +210,14 @@ FFMpegArgumentProcessor H264Encode(string filePath, int W = -1, int H = -1, int
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);
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}
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FFMpegArgumentProcessor AV1EncodeCPU(string filePath, int W = -1, int H = -1, int CQ = 23) {
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FFMpegArgumentProcessor AV1EncodeCPU(string filePath, int W = -1, int H = -1, int CQ = 23, int preset = 0) {
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return FFMpegArguments
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.FromFileInput(inputFile)
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.OutputToFile(filePath, true, options => options
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.CopyChannel(Channel.Audio)
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.CopyChannel(Channel.Subtitle)
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.WithVideoCodec("libsvtav1")
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.WithCustomArgument($"-preset 3")
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.WithCustomArgument($"-preset {preset}")
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.WithConstantRateFactor(CQ)
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.WithCustomArgument("-svtav1-params tune=0")
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.WithVideoFilters(filterOptions => {if (W > 0 && H > 0) filterOptions.Scale(W, H);})
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@@ -157,14 +225,14 @@ FFMpegArgumentProcessor AV1EncodeCPU(string filePath, int W = -1, int H = -1, in
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);
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}
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FFMpegArgumentProcessor HEVCEncodeCPU(string filePath, int W = -1, int H = -1, int CQ = 23) {
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FFMpegArgumentProcessor HEVCEncodeCPU(string filePath, int W = -1, int H = -1, int CQ = 23, int preset = 0) {
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return FFMpegArguments
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.FromFileInput(inputFile)
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.OutputToFile(filePath, true, options => options
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.CopyChannel(Channel.Audio)
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.CopyChannel(Channel.Subtitle)
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.WithVideoCodec(VideoCodec.LibX265)
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.WithSpeedPreset(Speed.Slow)
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.WithSpeedPreset(ToX264Speed(preset))
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.WithConstantRateFactor(CQ)
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.WithCustomArgument("-x265-params profile=main10:high-tier=1:aq-mode=3:psy-rd=1:rc-lookahead=60:bframes=6")
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.WithVideoFilters(filterOptions => {if (W > 0 && H > 0) filterOptions.Scale(W, H);})
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@@ -172,14 +240,14 @@ FFMpegArgumentProcessor HEVCEncodeCPU(string filePath, int W = -1, int H = -1, i
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);
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}
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FFMpegArgumentProcessor H264EncodeCPU(string filePath, int W = -1, int H = -1, int CQ = 23) {
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FFMpegArgumentProcessor H264EncodeCPU(string filePath, int W = -1, int H = -1, int CQ = 23, int preset = 0) {
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return FFMpegArguments
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.FromFileInput(inputFile)
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.OutputToFile(filePath, true, options => options
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.CopyChannel(Channel.Audio)
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.CopyChannel(Channel.Subtitle)
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.WithVideoCodec(VideoCodec.LibX264)
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.WithSpeedPreset(Speed.Slow)
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.WithSpeedPreset(ToX264Speed(preset))
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.WithConstantRateFactor(CQ)
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.WithCustomArgument("-x265-params profile=main10:high-tier=1:aq-mode=3:psy-rd=1:rc-lookahead=60:bframes=6")
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.WithVideoFilters(filterOptions => {if (W > 0 && H > 0) filterOptions.Scale(W, H);})
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@@ -187,6 +255,43 @@ FFMpegArgumentProcessor H264EncodeCPU(string filePath, int W = -1, int H = -1, i
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);
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}
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async Task<float> ComputeVMAFScore(string referenceFile, string distortedFile) {
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float VMAF = -1;
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ProcessStartInfo startInfo = new ProcessStartInfo {
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FileName = Path.Combine(ffmpegPath, "ffmpeg"),
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Arguments = $"-i \"{distortedFile}\" -i \"{referenceFile}\" -lavfi libvmaf -f null -",
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RedirectStandardOutput = true,
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UseShellExecute = false,
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CreateNoWindow = true
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};
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using Process ffmpeg = Process.Start(startInfo)!;
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string output = ffmpeg.StandardOutput.ReadToEnd();
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await ffmpeg.WaitForExitAsync();
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// Parse VMAF score from output
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string marker = "VMAF score: ";
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int index = output.LastIndexOf(marker, StringComparison.Ordinal);
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if (index != -1) {
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int start = index + marker.Length;
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int end = output.IndexOf("\n", start, StringComparison.Ordinal);
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string scoreStr = output.Substring(start, end - start).Trim();
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if (float.TryParse(scoreStr, out float score)) {
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VMAF = score;
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}
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}
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return VMAF;
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}
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Speed ToX264Speed(int p) => p switch {
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1 => Speed.VerySlow,
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2 => Speed.Slower,
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3 => Speed.Slow,
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4 => Speed.Medium,
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5 => Speed.Fast,
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6 => Speed.Faster,
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7 => Speed.VeryFast,
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_ => Speed.Medium
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};
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public enum Encoder {
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AV1_NVENC,
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HEVC_NVENC,
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@@ -195,3 +300,14 @@ public enum Encoder {
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HEVC_CPU,
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H264_CPU
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}
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record struct EncodeStats {
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public string Filename;
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public Encoder EncoderType;
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public int Width;
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public int Height;
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public int CRF;
|
||||
public int preset;
|
||||
public float SizeRatio;
|
||||
public TimeSpan EncodeTime;
|
||||
}
|
||||
Reference in New Issue
Block a user