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114 righe
3.3 KiB
114 righe
3.3 KiB
using AppTime.Properties;
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Drawing;
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using System.Drawing.Imaging;
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using System.IO;
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using System.IO.MemoryMappedFiles;
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using System.IO.Pipes;
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using System.Linq;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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using System.Windows.Forms;
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using static AppTime.Recorder;
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namespace AppTime
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{
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class Ffmpeg
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{
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static Process lastFfmpeg;
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public static void KillLastFfmpeg()
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{
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if (lastFfmpeg != null && !lastFfmpeg.HasExited)
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{
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Utils.Try(() => lastFfmpeg.Kill());
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lastFfmpeg = null;
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}
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}
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public static byte[] Snapshot(string file, TimeSpan time)
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{
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var args = $@"-loglevel quiet -ss {time} -i ""{file}"" -y -frames 1 -q:v 2 -f image2 -";
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var info = new ProcessStartInfo(@"ffmpeg\ffmpeg.exe", args)
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{
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RedirectStandardOutput = true,
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RedirectStandardError = true,
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RedirectStandardInput = true,
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UseShellExecute = false,
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CreateNoWindow = true,
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WorkingDirectory = Path.GetDirectoryName(Application.ExecutablePath)
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};
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var p = lastFfmpeg = Process.Start(info);
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var output = p.StandardOutput.BaseStream;
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var data = new List<byte>();
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var b = output.ReadByte();
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while (b != -1)
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{
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data.Add((byte)b);
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b = output.ReadByte();
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}
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return data.ToArray();
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}
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public static void Save(string file, params Frame[] images)
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{
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if (images.Length == 0)
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{
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return;
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}
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var rate = images.Length / ((images.Last().Time - images.First().Time).TotalSeconds + 1);
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var crf = Settings.Default.ImageQuality;//0-质量最高 63-质量最低 实测40质量也不错且体积较小
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var tempfile = Path.Combine(Path.GetDirectoryName(file), Path.GetFileNameWithoutExtension(file) + ".tmp");
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var args = $@"-loglevel quiet -f image2pipe -r {rate} -i - -vcodec libx264 -crf {crf} -f matroska -y ""{tempfile}""";
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var info = new ProcessStartInfo(@"ffmpeg\ffmpeg.exe", args)
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{
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RedirectStandardOutput = true,
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RedirectStandardError = true,
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RedirectStandardInput = true,
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UseShellExecute = false,
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CreateNoWindow = true,
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WorkingDirectory = Path.GetDirectoryName(Application.ExecutablePath)
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};
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var p = Process.Start(info);
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p.PriorityClass = ProcessPriorityClass.BelowNormal;
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foreach (var i in images)
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{
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p.StandardInput.BaseStream.Write(i.Data, 0, i.Data.Length);
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}
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p.StandardInput.Close();
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p.WaitForExit();
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if (File.Exists(file))
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{
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File.Delete(file);
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}
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File.Move(tempfile, file);
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}
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}
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public class Frame
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{
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public TimeSpan Time;
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public byte[] Data;
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public Frame(TimeSpan time, byte[] data)
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{
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this.Time = time;
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this.Data = data;
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}
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}
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}
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