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