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using MediaBrowser.Common.Configuration;
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using MediaBrowser.Common.Extensions;
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using MediaBrowser.Model.Logging;
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using System;
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using System.Diagnostics;
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using System.Globalization;
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using System.IO;
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using System.Text;
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namespace MediaBrowser.Server.Startup.Common.FFMpeg
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{
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public class FFmpegValidator
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{
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private readonly ILogger _logger;
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private readonly IApplicationPaths _appPaths;
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public FFmpegValidator(ILogger logger, IApplicationPaths appPaths)
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{
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_logger = logger;
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_appPaths = appPaths;
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}
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public void Validate(FFMpegInfo info)
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{
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_logger.Info("FFMpeg: {0}", info.EncoderPath);
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_logger.Info("FFProbe: {0}", info.ProbePath);
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var fileInfo = new FileInfo(info.EncoderPath);
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var cachePath = Path.Combine(_appPaths.CachePath, fileInfo.Length.ToString(CultureInfo.InvariantCulture).GetMD5().ToString("N"));
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if (!File.Exists(cachePath))
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{
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ValidateCodecs(info.EncoderPath);
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Directory.CreateDirectory(Path.GetDirectoryName(cachePath));
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File.WriteAllText(cachePath, string.Empty, Encoding.UTF8);
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}
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}
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private void ValidateCodecs(string path)
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{
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var output = GetOutput(path, "-encoders");
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var required = new[]
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{
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"libx264",
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"mpeg4",
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"msmpeg4",
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"libvpx",
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//"libvpx-vp9",
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"aac",
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"ac3",
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"libmp3lame",
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"libvorbis",
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"srt"
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};
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foreach (var encoder in required)
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{
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var srch = " " + encoder + " ";
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if (output.IndexOf(srch, StringComparison.OrdinalIgnoreCase) == -1)
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{
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throw new ArgumentException("ffmpeg is missing encoder " + encoder);
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}
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}
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}
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private string GetOutput(string path, string arguments)
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{
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var process = new Process
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{
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StartInfo = new ProcessStartInfo
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{
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CreateNoWindow = true,
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UseShellExecute = false,
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FileName = path,
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Arguments = arguments,
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WindowStyle = ProcessWindowStyle.Hidden,
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ErrorDialog = false,
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RedirectStandardOutput = true,
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RedirectStandardError = true
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}
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};
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using (process)
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{
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process.Start();
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try
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{
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process.BeginErrorReadLine();
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using (var reader = new StreamReader(process.StandardOutput.BaseStream))
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{
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return reader.ReadToEnd();
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}
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}
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catch
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{
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// Hate having to do this
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try
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{
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process.Kill();
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}
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catch (Exception ex1)
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{
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_logger.ErrorException("Error killing ffmpeg", ex1);
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}
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throw;
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}
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}
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}
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}
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}
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