958 lines
34 KiB
C#
958 lines
34 KiB
C#
using MediaBrowser.Common.Configuration;
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using MediaBrowser.Common.IO;
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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.MediaEncoding.Subtitles;
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using MediaBrowser.Model.Configuration;
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using MediaBrowser.Model.Dto;
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using MediaBrowser.Model.Entities;
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using MediaBrowser.Model.IO;
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using MediaBrowser.Model.Logging;
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using MediaBrowser.Model.MediaInfo;
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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.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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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 readonly CultureInfo UsCulture = new CultureInfo("en-US");
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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)
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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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}
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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)
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.CreateJob(options, IsVideoEncoder, progress, cancellationToken).ConfigureAwait(false);
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encodingJob.OutputFilePath = GetOutputFilePath(encodingJob);
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Directory.CreateDirectory(Path.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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if (GetEncodingOptions().EnableDebugLogging)
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{
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commandLineArgs = "-loglevel debug " + commandLineArgs;
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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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// 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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WindowStyle = ProcessWindowStyle.Hidden,
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ErrorDialog = false
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},
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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.Info(commandLineLogMessage);
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var logFilePath = Path.Combine(ConfigurationManager.CommonApplicationPaths.LogDirectoryPath, "transcode-" + Guid.NewGuid() + ".txt");
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Directory.CreateDirectory(Path.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, FileMode.Create, FileAccess.Write, FileShare.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.ErrorException("Error starting ffmpeg", ex);
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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 (!File.Exists(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(Process process, EncodingJob job)
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{
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Logger.Info("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(Process process, EncodingJob job)
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{
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job.HasExited = true;
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Logger.Debug("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.Info("FFMpeg exited with code {0}", exitCode);
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isSuccesful = exitCode == 0;
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}
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catch
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{
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Logger.Error("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 ApplicationException("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.ErrorException("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);
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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.OutputDirectory) ?
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ConfigurationManager.ApplicationPaths.TranscodingTempPath :
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state.Options.OutputDirectory;
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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.OutputContainer))
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{
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return "." + state.Options.OutputContainer;
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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 number of threads.
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/// </summary>
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/// <returns>System.Int32.</returns>
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protected int GetNumberOfThreads(EncodingJob job, bool isWebm)
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{
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return job.Options.CpuCoreLimit ?? 0;
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}
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protected string GetInputModifier(EncodingJob job, bool genPts = true)
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{
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var inputModifier = string.Empty;
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var probeSize = GetProbeSizeArgument(job);
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inputModifier += " " + probeSize;
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inputModifier = inputModifier.Trim();
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var userAgentParam = GetUserAgentParam(job);
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if (!string.IsNullOrWhiteSpace(userAgentParam))
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{
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inputModifier += " " + userAgentParam;
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}
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inputModifier = inputModifier.Trim();
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inputModifier += " " + GetFastSeekCommandLineParameter(job.Options);
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inputModifier = inputModifier.Trim();
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if (job.IsVideoRequest && genPts)
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{
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inputModifier += " -fflags +genpts";
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}
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if (!string.IsNullOrEmpty(job.InputAudioSync))
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{
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inputModifier += " -async " + job.InputAudioSync;
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}
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if (!string.IsNullOrEmpty(job.InputVideoSync))
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{
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inputModifier += " -vsync " + job.InputVideoSync;
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}
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if (job.ReadInputAtNativeFramerate)
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{
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inputModifier += " -re";
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}
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return inputModifier;
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}
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private string GetUserAgentParam(EncodingJob job)
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{
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string useragent = null;
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job.RemoteHttpHeaders.TryGetValue("User-Agent", out useragent);
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if (!string.IsNullOrWhiteSpace(useragent))
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{
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return "-user-agent \"" + useragent + "\"";
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}
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return string.Empty;
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}
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/// <summary>
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/// Gets the probe size argument.
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/// </summary>
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/// <param name="job">The job.</param>
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/// <returns>System.String.</returns>
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private string GetProbeSizeArgument(EncodingJob job)
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{
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if (job.PlayableStreamFileNames.Count > 0)
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{
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return MediaEncoder.GetProbeSizeArgument(job.PlayableStreamFileNames.ToArray(), job.InputProtocol);
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}
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return MediaEncoder.GetProbeSizeArgument(new[] { job.MediaPath }, job.InputProtocol);
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}
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/// <summary>
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/// Gets the fast seek command line parameter.
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/// </summary>
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/// <param name="options">The options.</param>
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/// <returns>System.String.</returns>
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/// <value>The fast seek command line parameter.</value>
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protected string GetFastSeekCommandLineParameter(EncodingJobOptions options)
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{
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var time = options.StartTimeTicks;
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if (time.HasValue && time.Value > 0)
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{
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return string.Format("-ss {0}", MediaEncoder.GetTimeParameter(time.Value));
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}
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return string.Empty;
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}
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/// <summary>
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/// Gets the input argument.
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/// </summary>
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/// <param name="job">The job.</param>
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/// <returns>System.String.</returns>
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protected string GetInputArgument(EncodingJob job)
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{
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var arg = "-i " + GetInputPathArgument(job);
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if (job.SubtitleStream != null)
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{
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if (job.SubtitleStream.IsExternal && !job.SubtitleStream.IsTextSubtitleStream)
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{
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arg += " -i \"" + job.SubtitleStream.Path + "\"";
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}
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}
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return arg;
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}
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private string GetInputPathArgument(EncodingJob job)
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{
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var protocol = job.InputProtocol;
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var inputPath = new[] { job.MediaPath };
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if (job.IsInputVideo)
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{
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if (!(job.VideoType == VideoType.Iso && job.IsoMount == null))
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{
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inputPath = MediaEncoderHelpers.GetInputArgument(job.MediaPath, job.InputProtocol, job.IsoMount, job.PlayableStreamFileNames);
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}
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}
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return MediaEncoder.GetInputArgument(inputPath, protocol);
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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 ?? false)
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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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}, false, cancellationToken).ConfigureAwait(false);
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AttachMediaStreamInfo(state, liveStreamResponse.MediaSource, state.Options);
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if (state.IsVideoRequest)
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{
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EncodingJobFactory.TryStreamCopy(state, state.Options);
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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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private void AttachMediaStreamInfo(EncodingJob state,
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MediaSourceInfo mediaSource,
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EncodingJobOptions videoRequest)
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{
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EncodingJobFactory.AttachMediaStreamInfo(state, mediaSource, videoRequest);
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}
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/// <summary>
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/// Gets the internal graphical subtitle param.
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/// </summary>
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/// <param name="state">The state.</param>
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/// <param name="outputVideoCodec">The output video codec.</param>
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/// <returns>System.String.</returns>
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protected string GetGraphicalSubtitleParam(EncodingJob state, string outputVideoCodec)
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{
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var outputSizeParam = string.Empty;
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var request = state.Options;
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// Add resolution params, if specified
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if (request.Width.HasValue || request.Height.HasValue || request.MaxHeight.HasValue || request.MaxWidth.HasValue)
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{
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outputSizeParam = GetOutputSizeParam(state, outputVideoCodec).TrimEnd('"');
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outputSizeParam = "," + outputSizeParam.Substring(outputSizeParam.IndexOf("scale", StringComparison.OrdinalIgnoreCase));
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}
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var videoSizeParam = string.Empty;
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if (state.VideoStream != null && state.VideoStream.Width.HasValue && state.VideoStream.Height.HasValue)
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{
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videoSizeParam = string.Format(",scale={0}:{1}", state.VideoStream.Width.Value.ToString(UsCulture), state.VideoStream.Height.Value.ToString(UsCulture));
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}
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var mapPrefix = state.SubtitleStream.IsExternal ?
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1 :
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0;
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var subtitleStreamIndex = state.SubtitleStream.IsExternal
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? 0
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: state.SubtitleStream.Index;
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return string.Format(" -filter_complex \"[{0}:{1}]format=yuva444p{4},lut=u=128:v=128:y=gammaval(.3)[sub] ; [0:{2}] [sub] overlay{3}\"",
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mapPrefix.ToString(UsCulture),
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subtitleStreamIndex.ToString(UsCulture),
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state.VideoStream.Index.ToString(UsCulture),
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outputSizeParam,
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videoSizeParam);
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}
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/// <summary>
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/// Gets the video bitrate to specify on the command line
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/// </summary>
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/// <param name="state">The state.</param>
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/// <param name="videoCodec">The video codec.</param>
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/// <param name="isHls">if set to <c>true</c> [is HLS].</param>
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/// <returns>System.String.</returns>
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protected string GetVideoQualityParam(EncodingJob state, string videoCodec, bool isHls)
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{
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var param = string.Empty;
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var isVc1 = state.VideoStream != null &&
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string.Equals(state.VideoStream.Codec, "vc1", StringComparison.OrdinalIgnoreCase);
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var qualitySetting = state.Quality;
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if (string.Equals(videoCodec, "libx264", StringComparison.OrdinalIgnoreCase))
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{
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param = "-preset superfast";
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switch (qualitySetting)
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{
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case EncodingQuality.HighSpeed:
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param += " -crf 28";
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break;
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case EncodingQuality.HighQuality:
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param += " -crf 25";
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break;
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case EncodingQuality.MaxQuality:
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param += " -crf 21";
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break;
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}
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}
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else if (string.Equals(videoCodec, "libx265", StringComparison.OrdinalIgnoreCase))
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{
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param = "-preset fast";
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switch (qualitySetting)
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{
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case EncodingQuality.HighSpeed:
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param += " -crf 28";
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break;
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case EncodingQuality.HighQuality:
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param += " -crf 25";
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break;
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case EncodingQuality.MaxQuality:
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param += " -crf 21";
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break;
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}
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}
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// webm
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else if (string.Equals(videoCodec, "libvpx", StringComparison.OrdinalIgnoreCase))
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{
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// Values 0-3, 0 being highest quality but slower
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var profileScore = 0;
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string crf;
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var qmin = "0";
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var qmax = "50";
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switch (qualitySetting)
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{
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case EncodingQuality.HighSpeed:
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|
crf = "10";
|
|
break;
|
|
case EncodingQuality.HighQuality:
|
|
crf = "6";
|
|
break;
|
|
case EncodingQuality.MaxQuality:
|
|
crf = "4";
|
|
break;
|
|
default:
|
|
throw new ArgumentException("Unrecognized quality setting");
|
|
}
|
|
|
|
if (isVc1)
|
|
{
|
|
profileScore++;
|
|
}
|
|
|
|
// Max of 2
|
|
profileScore = Math.Min(profileScore, 2);
|
|
|
|
// http://www.webmproject.org/docs/encoder-parameters/
|
|
param = string.Format("-speed 16 -quality good -profile:v {0} -slices 8 -crf {1} -qmin {2} -qmax {3}",
|
|
profileScore.ToString(UsCulture),
|
|
crf,
|
|
qmin,
|
|
qmax);
|
|
}
|
|
|
|
else if (string.Equals(videoCodec, "mpeg4", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
param = "-mbd rd -flags +mv4+aic -trellis 2 -cmp 2 -subcmp 2 -bf 2";
|
|
}
|
|
|
|
// asf/wmv
|
|
else if (string.Equals(videoCodec, "wmv2", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
param = "-qmin 2";
|
|
}
|
|
|
|
else if (string.Equals(videoCodec, "msmpeg4", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
param = "-mbd 2";
|
|
}
|
|
|
|
param += GetVideoBitrateParam(state, videoCodec, isHls);
|
|
|
|
var framerate = GetFramerateParam(state);
|
|
if (framerate.HasValue)
|
|
{
|
|
param += string.Format(" -r {0}", framerate.Value.ToString(UsCulture));
|
|
}
|
|
|
|
if (!string.IsNullOrEmpty(state.OutputVideoSync))
|
|
{
|
|
param += " -vsync " + state.OutputVideoSync;
|
|
}
|
|
|
|
if (!string.IsNullOrEmpty(state.Options.Profile))
|
|
{
|
|
param += " -profile:v " + state.Options.Profile;
|
|
}
|
|
|
|
if (state.Options.Level.HasValue)
|
|
{
|
|
param += " -level " + state.Options.Level.Value.ToString(UsCulture);
|
|
}
|
|
|
|
return "-pix_fmt yuv420p " + param;
|
|
}
|
|
|
|
protected string GetVideoBitrateParam(EncodingJob state, string videoCodec, bool isHls)
|
|
{
|
|
var bitrate = state.OutputVideoBitrate;
|
|
|
|
if (bitrate.HasValue)
|
|
{
|
|
var hasFixedResolution = state.Options.HasFixedResolution;
|
|
|
|
if (string.Equals(videoCodec, "libvpx", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
if (hasFixedResolution)
|
|
{
|
|
return string.Format(" -minrate:v ({0}*.90) -maxrate:v ({0}*1.10) -bufsize:v {0} -b:v {0}", bitrate.Value.ToString(UsCulture));
|
|
}
|
|
|
|
// With vpx when crf is used, b:v becomes a max rate
|
|
// https://trac.ffmpeg.org/wiki/vpxEncodingGuide. But higher bitrate source files -b:v causes judder so limite the bitrate but dont allow it to "saturate" the bitrate. So dont contrain it down just up.
|
|
return string.Format(" -maxrate:v {0} -bufsize:v ({0}*2) -b:v {0}", bitrate.Value.ToString(UsCulture));
|
|
}
|
|
|
|
if (string.Equals(videoCodec, "msmpeg4", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
return string.Format(" -b:v {0}", bitrate.Value.ToString(UsCulture));
|
|
}
|
|
|
|
// H264
|
|
if (hasFixedResolution)
|
|
{
|
|
if (isHls)
|
|
{
|
|
return string.Format(" -b:v {0} -maxrate ({0}*.80) -bufsize {0}", bitrate.Value.ToString(UsCulture));
|
|
}
|
|
|
|
return string.Format(" -b:v {0}", bitrate.Value.ToString(UsCulture));
|
|
}
|
|
|
|
return string.Format(" -maxrate {0} -bufsize {1}",
|
|
bitrate.Value.ToString(UsCulture),
|
|
(bitrate.Value * 2).ToString(UsCulture));
|
|
}
|
|
|
|
return string.Empty;
|
|
}
|
|
|
|
protected double? GetFramerateParam(EncodingJob state)
|
|
{
|
|
if (state.Options.Framerate.HasValue)
|
|
{
|
|
return state.Options.Framerate.Value;
|
|
}
|
|
|
|
var maxrate = state.Options.MaxFramerate;
|
|
|
|
if (maxrate.HasValue && state.VideoStream != null)
|
|
{
|
|
var contentRate = state.VideoStream.AverageFrameRate ?? state.VideoStream.RealFrameRate;
|
|
|
|
if (contentRate.HasValue && contentRate.Value > maxrate.Value)
|
|
{
|
|
return maxrate;
|
|
}
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the map args.
|
|
/// </summary>
|
|
/// <param name="state">The state.</param>
|
|
/// <returns>System.String.</returns>
|
|
protected virtual string GetMapArgs(EncodingJob state)
|
|
{
|
|
// If we don't have known media info
|
|
// If input is video, use -sn to drop subtitles
|
|
// Otherwise just return empty
|
|
if (state.VideoStream == null && state.AudioStream == null)
|
|
{
|
|
return state.IsInputVideo ? "-sn" : string.Empty;
|
|
}
|
|
|
|
// We have media info, but we don't know the stream indexes
|
|
if (state.VideoStream != null && state.VideoStream.Index == -1)
|
|
{
|
|
return "-sn";
|
|
}
|
|
|
|
// We have media info, but we don't know the stream indexes
|
|
if (state.AudioStream != null && state.AudioStream.Index == -1)
|
|
{
|
|
return state.IsInputVideo ? "-sn" : string.Empty;
|
|
}
|
|
|
|
var args = string.Empty;
|
|
|
|
if (state.VideoStream != null)
|
|
{
|
|
args += string.Format("-map 0:{0}", state.VideoStream.Index);
|
|
}
|
|
else
|
|
{
|
|
args += "-map -0:v";
|
|
}
|
|
|
|
if (state.AudioStream != null)
|
|
{
|
|
args += string.Format(" -map 0:{0}", state.AudioStream.Index);
|
|
}
|
|
|
|
else
|
|
{
|
|
args += " -map -0:a";
|
|
}
|
|
|
|
if (state.SubtitleStream == null)
|
|
{
|
|
args += " -map -0:s";
|
|
}
|
|
else if (state.SubtitleStream.IsExternal && !state.SubtitleStream.IsTextSubtitleStream)
|
|
{
|
|
args += " -map 1:0 -sn";
|
|
}
|
|
|
|
return args;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Determines whether the specified stream is H264.
|
|
/// </summary>
|
|
/// <param name="stream">The stream.</param>
|
|
/// <returns><c>true</c> if the specified stream is H264; otherwise, <c>false</c>.</returns>
|
|
protected bool IsH264(MediaStream stream)
|
|
{
|
|
var codec = stream.Codec ?? string.Empty;
|
|
|
|
return codec.IndexOf("264", StringComparison.OrdinalIgnoreCase) != -1 ||
|
|
codec.IndexOf("avc", StringComparison.OrdinalIgnoreCase) != -1;
|
|
}
|
|
|
|
/// <summary>
|
|
/// If we're going to put a fixed size on the command line, this will calculate it
|
|
/// </summary>
|
|
/// <param name="state">The state.</param>
|
|
/// <param name="outputVideoCodec">The output video codec.</param>
|
|
/// <param name="allowTimeStampCopy">if set to <c>true</c> [allow time stamp copy].</param>
|
|
/// <returns>System.String.</returns>
|
|
protected string GetOutputSizeParam(EncodingJob state,
|
|
string outputVideoCodec,
|
|
bool allowTimeStampCopy = true)
|
|
{
|
|
// http://sonnati.wordpress.com/2012/10/19/ffmpeg-the-swiss-army-knife-of-internet-streaming-part-vi/
|
|
|
|
var request = state.Options;
|
|
|
|
var filters = new List<string>();
|
|
|
|
if (state.DeInterlace)
|
|
{
|
|
filters.Add("yadif=0:-1:0");
|
|
}
|
|
|
|
// If fixed dimensions were supplied
|
|
if (request.Width.HasValue && request.Height.HasValue)
|
|
{
|
|
var widthParam = request.Width.Value.ToString(UsCulture);
|
|
var heightParam = request.Height.Value.ToString(UsCulture);
|
|
|
|
filters.Add(string.Format("scale=trunc({0}/2)*2:trunc({1}/2)*2", widthParam, heightParam));
|
|
}
|
|
|
|
// If Max dimensions were supplied, for width selects lowest even number between input width and width req size and selects lowest even number from in width*display aspect and requested size
|
|
else if (request.MaxWidth.HasValue && request.MaxHeight.HasValue)
|
|
{
|
|
var maxWidthParam = request.MaxWidth.Value.ToString(UsCulture);
|
|
var maxHeightParam = request.MaxHeight.Value.ToString(UsCulture);
|
|
|
|
filters.Add(string.Format("scale=trunc(min(max(iw\\,ih*dar)\\,min({0}\\,{1}*dar))/2)*2:trunc(min(max(iw/dar\\,ih)\\,min({0}/dar\\,{1}))/2)*2", maxWidthParam, maxHeightParam));
|
|
}
|
|
|
|
// If a fixed width was requested
|
|
else if (request.Width.HasValue)
|
|
{
|
|
var widthParam = request.Width.Value.ToString(UsCulture);
|
|
|
|
filters.Add(string.Format("scale={0}:trunc(ow/a/2)*2", widthParam));
|
|
}
|
|
|
|
// If a fixed height was requested
|
|
else if (request.Height.HasValue)
|
|
{
|
|
var heightParam = request.Height.Value.ToString(UsCulture);
|
|
|
|
filters.Add(string.Format("scale=trunc(oh*a/2)*2:{0}", heightParam));
|
|
}
|
|
|
|
// If a max width was requested
|
|
else if (request.MaxWidth.HasValue)
|
|
{
|
|
var maxWidthParam = request.MaxWidth.Value.ToString(UsCulture);
|
|
|
|
filters.Add(string.Format("scale=min(iw\\,{0}):trunc(ow/dar/2)*2", maxWidthParam));
|
|
}
|
|
|
|
// If a max height was requested
|
|
else if (request.MaxHeight.HasValue)
|
|
{
|
|
var maxHeightParam = request.MaxHeight.Value.ToString(UsCulture);
|
|
|
|
filters.Add(string.Format("scale=trunc(oh*a/2)*2:min(ih\\,{0})", maxHeightParam));
|
|
}
|
|
|
|
var output = string.Empty;
|
|
|
|
if (state.SubtitleStream != null && state.SubtitleStream.IsTextSubtitleStream)
|
|
{
|
|
var subParam = GetTextSubtitleParam(state);
|
|
|
|
filters.Add(subParam);
|
|
|
|
if (allowTimeStampCopy)
|
|
{
|
|
output += " -copyts";
|
|
}
|
|
}
|
|
|
|
if (filters.Count > 0)
|
|
{
|
|
output += string.Format(" -vf \"{0}\"", string.Join(",", filters.ToArray()));
|
|
}
|
|
|
|
return output;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the text subtitle param.
|
|
/// </summary>
|
|
/// <param name="state">The state.</param>
|
|
/// <returns>System.String.</returns>
|
|
protected string GetTextSubtitleParam(EncodingJob state)
|
|
{
|
|
var seconds = Math.Round(TimeSpan.FromTicks(state.Options.StartTimeTicks ?? 0).TotalSeconds);
|
|
|
|
if (state.SubtitleStream.IsExternal)
|
|
{
|
|
var subtitlePath = state.SubtitleStream.Path;
|
|
|
|
var charsetParam = string.Empty;
|
|
|
|
if (!string.IsNullOrEmpty(state.SubtitleStream.Language))
|
|
{
|
|
var charenc = SubtitleEncoder.GetSubtitleFileCharacterSet(subtitlePath, state.MediaSource.Protocol, CancellationToken.None).Result;
|
|
|
|
if (!string.IsNullOrEmpty(charenc))
|
|
{
|
|
charsetParam = ":charenc=" + charenc;
|
|
}
|
|
}
|
|
|
|
// TODO: Perhaps also use original_size=1920x800 ??
|
|
return string.Format("subtitles=filename='{0}'{1},setpts=PTS -{2}/TB",
|
|
subtitlePath.Replace('\\', '/').Replace(":/", "\\:/"),
|
|
charsetParam,
|
|
seconds.ToString(UsCulture));
|
|
}
|
|
|
|
return string.Format("subtitles='{0}:si={1}',setpts=PTS -{2}/TB",
|
|
state.MediaPath.Replace('\\', '/').Replace(":/", "\\:/"),
|
|
state.InternalSubtitleStreamOffset.ToString(UsCulture),
|
|
seconds.ToString(UsCulture));
|
|
}
|
|
|
|
protected string GetAudioFilterParam(EncodingJob state, bool isHls)
|
|
{
|
|
var volParam = string.Empty;
|
|
var audioSampleRate = string.Empty;
|
|
|
|
var channels = state.OutputAudioChannels;
|
|
|
|
// Boost volume to 200% when downsampling from 6ch to 2ch
|
|
if (channels.HasValue && channels.Value <= 2)
|
|
{
|
|
if (state.AudioStream != null && state.AudioStream.Channels.HasValue && state.AudioStream.Channels.Value > 5)
|
|
{
|
|
volParam = ",volume=" + GetEncodingOptions().DownMixAudioBoost.ToString(UsCulture);
|
|
}
|
|
}
|
|
|
|
if (state.OutputAudioSampleRate.HasValue)
|
|
{
|
|
audioSampleRate = state.OutputAudioSampleRate.Value + ":";
|
|
}
|
|
|
|
var adelay = isHls ? "adelay=1," : string.Empty;
|
|
|
|
var pts = string.Empty;
|
|
|
|
if (state.SubtitleStream != null && state.SubtitleStream.IsTextSubtitleStream)
|
|
{
|
|
var seconds = TimeSpan.FromTicks(state.Options.StartTimeTicks ?? 0).TotalSeconds;
|
|
|
|
pts = string.Format(",asetpts=PTS-{0}/TB", Math.Round(seconds).ToString(UsCulture));
|
|
}
|
|
|
|
return string.Format("-af \"{0}aresample={1}async={4}{2}{3}\"",
|
|
|
|
adelay,
|
|
audioSampleRate,
|
|
volParam,
|
|
pts,
|
|
state.OutputAudioSync);
|
|
}
|
|
}
|
|
}
|