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102 lines
3.2 KiB
C#
102 lines
3.2 KiB
C#
using System;
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using System.Diagnostics;
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using System.IO;
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using System.Threading.Tasks;
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using MediaBrowser.Common.Logging;
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using MediaBrowser.Common.Serialization;
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using MediaBrowser.Model.Entities;
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namespace MediaBrowser.Controller.FFMpeg
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{
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/// <summary>
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/// Runs FFProbe against a media file and returns metadata.
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/// </summary>
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public static class FFProbe
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{
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public async static Task<FFProbeResult> Run(Audio item, string outputCachePath)
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{
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// Use try catch to avoid having to use File.Exists
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try
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{
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using (FileStream stream = File.OpenRead(outputCachePath))
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{
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return JsonSerializer.DeserializeFromStream<FFProbeResult>(stream);
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}
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}
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catch (FileNotFoundException)
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{
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}
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await Run(item.Path, outputCachePath);
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using (FileStream stream = File.OpenRead(outputCachePath))
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{
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return JsonSerializer.DeserializeFromStream<FFProbeResult>(stream);
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}
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}
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private async static Task Run(string input, string output)
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{
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ProcessStartInfo startInfo = new ProcessStartInfo();
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startInfo.CreateNoWindow = true;
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startInfo.UseShellExecute = false;
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// Must consume both or ffmpeg may hang due to deadlocks. See comments below.
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startInfo.RedirectStandardOutput = true;
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startInfo.RedirectStandardError = true;
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startInfo.FileName = Kernel.Instance.ApplicationPaths.FFProbePath;
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startInfo.WorkingDirectory = Kernel.Instance.ApplicationPaths.FFMpegDirectory;
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startInfo.Arguments = string.Format("\"{0}\" -v quiet -print_format json -show_streams -show_format", input);
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//Logger.LogInfo(startInfo.FileName + " " + startInfo.Arguments);
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Process process = new Process();
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process.StartInfo = startInfo;
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FileStream stream = new FileStream(output, FileMode.Create);
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try
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{
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process.Start();
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// MUST read both stdout and stderr asynchronously or a deadlock may occurr
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// If we ever decide to disable the ffmpeg log then you must uncomment the below line.
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process.BeginErrorReadLine();
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await process.StandardOutput.BaseStream.CopyToAsync(stream);
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process.WaitForExit();
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stream.Dispose();
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if (process.ExitCode != 0)
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{
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Logger.LogInfo("FFProbe exited with code {0} for {1}", process.ExitCode, input);
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}
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}
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catch (Exception ex)
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{
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Logger.LogException(ex);
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stream.Dispose();
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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
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{
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}
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File.Delete(output);
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}
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finally
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{
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process.Dispose();
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}
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}
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}
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}
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