373 lines
14 KiB
C#
373 lines
14 KiB
C#
using System;
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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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using System.Threading;
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using System.Threading.Tasks;
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using MediaBrowser.Common.Configuration;
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using MediaBrowser.Controller.Configuration;
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using MediaBrowser.Controller.Library;
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using MediaBrowser.Controller.MediaEncoding;
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using MediaBrowser.Controller.Session;
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using MediaBrowser.Model.Configuration;
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using MediaBrowser.Model.Diagnostics;
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using MediaBrowser.Model.Entities;
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using MediaBrowser.Model.IO;
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using MediaBrowser.Model.MediaInfo;
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using Microsoft.Extensions.Logging;
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namespace MediaBrowser.MediaEncoding.Encoder
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{
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public abstract class BaseEncoder
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{
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protected readonly MediaEncoder MediaEncoder;
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protected readonly ILogger Logger;
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protected readonly IServerConfigurationManager ConfigurationManager;
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protected readonly IFileSystem FileSystem;
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protected readonly IIsoManager IsoManager;
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protected readonly ILibraryManager LibraryManager;
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protected readonly ISessionManager SessionManager;
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protected readonly ISubtitleEncoder SubtitleEncoder;
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protected readonly IMediaSourceManager MediaSourceManager;
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protected IProcessFactory ProcessFactory;
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protected readonly CultureInfo UsCulture = new CultureInfo("en-US");
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protected EncodingHelper EncodingHelper;
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protected BaseEncoder(MediaEncoder mediaEncoder,
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ILogger logger,
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IServerConfigurationManager configurationManager,
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IFileSystem fileSystem,
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IIsoManager isoManager,
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ILibraryManager libraryManager,
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ISessionManager sessionManager,
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ISubtitleEncoder subtitleEncoder,
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IMediaSourceManager mediaSourceManager, IProcessFactory processFactory)
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{
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MediaEncoder = mediaEncoder;
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Logger = logger;
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ConfigurationManager = configurationManager;
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FileSystem = fileSystem;
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IsoManager = isoManager;
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LibraryManager = libraryManager;
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SessionManager = sessionManager;
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SubtitleEncoder = subtitleEncoder;
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MediaSourceManager = mediaSourceManager;
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ProcessFactory = processFactory;
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EncodingHelper = new EncodingHelper(MediaEncoder, FileSystem, SubtitleEncoder);
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}
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public async Task<EncodingJob> Start(EncodingJobOptions options,
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IProgress<double> progress,
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CancellationToken cancellationToken)
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{
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var encodingJob = await new EncodingJobFactory(Logger, LibraryManager, MediaSourceManager, ConfigurationManager, MediaEncoder)
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.CreateJob(options, EncodingHelper, IsVideoEncoder, progress, cancellationToken).ConfigureAwait(false);
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encodingJob.OutputFilePath = GetOutputFilePath(encodingJob);
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FileSystem.CreateDirectory(FileSystem.GetDirectoryName(encodingJob.OutputFilePath));
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encodingJob.ReadInputAtNativeFramerate = options.ReadInputAtNativeFramerate;
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await AcquireResources(encodingJob, cancellationToken).ConfigureAwait(false);
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var commandLineArgs = GetCommandLineArguments(encodingJob);
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var process = ProcessFactory.Create(new ProcessOptions
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{
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CreateNoWindow = true,
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UseShellExecute = false,
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// Must consume both stdout and stderr or deadlocks may occur
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//RedirectStandardOutput = true,
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RedirectStandardError = true,
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RedirectStandardInput = true,
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FileName = MediaEncoder.EncoderPath,
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Arguments = commandLineArgs,
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IsHidden = true,
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ErrorDialog = false,
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EnableRaisingEvents = true
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});
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var workingDirectory = GetWorkingDirectory(options);
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if (!string.IsNullOrWhiteSpace(workingDirectory))
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{
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process.StartInfo.WorkingDirectory = workingDirectory;
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}
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OnTranscodeBeginning(encodingJob);
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var commandLineLogMessage = process.StartInfo.FileName + " " + process.StartInfo.Arguments;
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Logger.LogInformation(commandLineLogMessage);
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var logFilePath = Path.Combine(ConfigurationManager.CommonApplicationPaths.LogDirectoryPath, "transcode-" + Guid.NewGuid() + ".txt");
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FileSystem.CreateDirectory(FileSystem.GetDirectoryName(logFilePath));
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// FFMpeg writes debug/error info to stderr. This is useful when debugging so let's put it in the log directory.
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encodingJob.LogFileStream = FileSystem.GetFileStream(logFilePath, FileOpenMode.Create, FileAccessMode.Write, FileShareMode.Read, true);
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var commandLineLogMessageBytes = Encoding.UTF8.GetBytes(commandLineLogMessage + Environment.NewLine + Environment.NewLine);
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await encodingJob.LogFileStream.WriteAsync(commandLineLogMessageBytes, 0, commandLineLogMessageBytes.Length, cancellationToken).ConfigureAwait(false);
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process.Exited += (sender, args) => OnFfMpegProcessExited(process, encodingJob);
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try
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{
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process.Start();
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}
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catch (Exception ex)
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{
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Logger.LogError(ex, "Error starting ffmpeg");
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OnTranscodeFailedToStart(encodingJob.OutputFilePath, encodingJob);
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throw;
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}
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cancellationToken.Register(() => Cancel(process, encodingJob));
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// MUST read both stdout and stderr asynchronously or a deadlock may occurr
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//process.BeginOutputReadLine();
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// Important - don't await the log task or we won't be able to kill ffmpeg when the user stops playback
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new JobLogger(Logger).StartStreamingLog(encodingJob, process.StandardError.BaseStream, encodingJob.LogFileStream);
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// Wait for the file to exist before proceeeding
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while (!FileSystem.FileExists(encodingJob.OutputFilePath) && !encodingJob.HasExited)
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{
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await Task.Delay(100, cancellationToken).ConfigureAwait(false);
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}
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return encodingJob;
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}
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private void Cancel(IProcess process, EncodingJob job)
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{
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Logger.LogInformation("Killing ffmpeg process for {0}", job.OutputFilePath);
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//process.Kill();
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process.StandardInput.WriteLine("q");
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job.IsCancelled = true;
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}
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/// <summary>
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/// Processes the exited.
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/// </summary>
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/// <param name="process">The process.</param>
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/// <param name="job">The job.</param>
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private void OnFfMpegProcessExited(IProcess process, EncodingJob job)
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{
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job.HasExited = true;
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Logger.LogDebug("Disposing stream resources");
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job.Dispose();
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var isSuccesful = false;
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try
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{
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var exitCode = process.ExitCode;
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Logger.LogInformation("FFMpeg exited with code {0}", exitCode);
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isSuccesful = exitCode == 0;
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}
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catch (Exception ex)
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{
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Logger.LogError(ex, "FFMpeg exited with an error.");
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}
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if (isSuccesful && !job.IsCancelled)
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{
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job.TaskCompletionSource.TrySetResult(true);
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}
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else if (job.IsCancelled)
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{
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try
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{
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DeleteFiles(job);
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}
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catch
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{
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}
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try
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{
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job.TaskCompletionSource.TrySetException(new OperationCanceledException());
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}
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catch
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{
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}
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}
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else
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{
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try
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{
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DeleteFiles(job);
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}
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catch
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{
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}
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try
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{
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job.TaskCompletionSource.TrySetException(new Exception("Encoding failed"));
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}
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catch
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{
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}
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}
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// This causes on exited to be called twice:
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//try
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//{
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// // Dispose the process
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// process.Dispose();
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//}
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//catch (Exception ex)
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//{
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// Logger.LogError("Error disposing ffmpeg.", ex);
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//}
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}
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protected virtual void DeleteFiles(EncodingJob job)
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{
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FileSystem.DeleteFile(job.OutputFilePath);
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}
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private void OnTranscodeBeginning(EncodingJob job)
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{
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job.ReportTranscodingProgress(null, null, null, null, null);
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}
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private void OnTranscodeFailedToStart(string path, EncodingJob job)
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{
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if (!string.IsNullOrWhiteSpace(job.Options.DeviceId))
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{
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SessionManager.ClearTranscodingInfo(job.Options.DeviceId);
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}
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}
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protected abstract bool IsVideoEncoder { get; }
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protected virtual string GetWorkingDirectory(EncodingJobOptions options)
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{
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return null;
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}
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protected EncodingOptions GetEncodingOptions()
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{
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return ConfigurationManager.GetConfiguration<EncodingOptions>("encoding");
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}
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protected abstract string GetCommandLineArguments(EncodingJob job);
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private string GetOutputFilePath(EncodingJob state)
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{
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var folder = string.IsNullOrWhiteSpace(state.Options.TempDirectory) ?
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ConfigurationManager.ApplicationPaths.TranscodingTempPath :
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state.Options.TempDirectory;
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var outputFileExtension = GetOutputFileExtension(state);
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var filename = state.Id + (outputFileExtension ?? string.Empty).ToLower();
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return Path.Combine(folder, filename);
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}
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protected virtual string GetOutputFileExtension(EncodingJob state)
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{
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if (!string.IsNullOrWhiteSpace(state.Options.Container))
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{
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return "." + state.Options.Container;
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}
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return null;
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}
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/// <summary>
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/// Gets the name of the output video codec
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/// </summary>
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/// <param name="state">The state.</param>
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/// <returns>System.String.</returns>
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protected string GetVideoDecoder(EncodingJob state)
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{
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if (string.Equals(state.OutputVideoCodec, "copy", StringComparison.OrdinalIgnoreCase))
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{
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return null;
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}
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// Only use alternative encoders for video files.
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// When using concat with folder rips, if the mfx session fails to initialize, ffmpeg will be stuck retrying and will not exit gracefully
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// Since transcoding of folder rips is expiremental anyway, it's not worth adding additional variables such as this.
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if (state.VideoType != VideoType.VideoFile)
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{
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return null;
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}
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if (state.VideoStream != null && !string.IsNullOrWhiteSpace(state.VideoStream.Codec))
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{
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if (string.Equals(GetEncodingOptions().HardwareAccelerationType, "qsv", StringComparison.OrdinalIgnoreCase))
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{
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switch (state.MediaSource.VideoStream.Codec.ToLower())
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{
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case "avc":
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case "h264":
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if (MediaEncoder.SupportsDecoder("h264_qsv"))
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{
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// Seeing stalls and failures with decoding. Not worth it compared to encoding.
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return "-c:v h264_qsv ";
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}
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break;
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case "mpeg2video":
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if (MediaEncoder.SupportsDecoder("mpeg2_qsv"))
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{
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return "-c:v mpeg2_qsv ";
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}
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break;
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case "vc1":
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if (MediaEncoder.SupportsDecoder("vc1_qsv"))
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{
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return "-c:v vc1_qsv ";
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}
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break;
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}
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}
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}
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// leave blank so ffmpeg will decide
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return null;
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}
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private async Task AcquireResources(EncodingJob state, CancellationToken cancellationToken)
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{
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if (state.VideoType == VideoType.Iso && state.IsoType.HasValue && IsoManager.CanMount(state.MediaPath))
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{
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state.IsoMount = await IsoManager.Mount(state.MediaPath, cancellationToken).ConfigureAwait(false);
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}
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if (state.MediaSource.RequiresOpening && string.IsNullOrWhiteSpace(state.Options.LiveStreamId))
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{
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var liveStreamResponse = await MediaSourceManager.OpenLiveStream(new LiveStreamRequest
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{
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OpenToken = state.MediaSource.OpenToken
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}, cancellationToken).ConfigureAwait(false);
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EncodingHelper.AttachMediaSourceInfo(state, liveStreamResponse.MediaSource, null);
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if (state.IsVideoRequest)
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{
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EncodingHelper.TryStreamCopy(state);
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}
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}
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if (state.MediaSource.BufferMs.HasValue)
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{
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await Task.Delay(state.MediaSource.BufferMs.Value, cancellationToken).ConfigureAwait(false);
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}
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}
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}
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}
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