jellyfin-server/MediaBrowser.Server.Implementations/MediaEncoder/MediaEncoder.cs

1117 lines
39 KiB
C#
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2013-04-10 02:28:24 +00:00
using System.Globalization;
using MediaBrowser.Common.Configuration;
using MediaBrowser.Common.IO;
using MediaBrowser.Common.MediaInfo;
using MediaBrowser.Model.Entities;
using MediaBrowser.Model.IO;
using MediaBrowser.Model.Logging;
using MediaBrowser.Model.Serialization;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
namespace MediaBrowser.Server.Implementations.MediaEncoder
{
/// <summary>
/// Class MediaEncoder
/// </summary>
public class MediaEncoder : IMediaEncoder, IDisposable
{
/// <summary>
/// Gets or sets the zip client.
/// </summary>
/// <value>The zip client.</value>
private readonly IZipClient _zipClient;
/// <summary>
/// The _logger
/// </summary>
private readonly ILogger _logger;
/// <summary>
/// The _app paths
/// </summary>
private readonly IApplicationPaths _appPaths;
/// <summary>
/// Gets the json serializer.
/// </summary>
/// <value>The json serializer.</value>
private readonly IJsonSerializer _jsonSerializer;
/// <summary>
/// The video image resource pool
/// </summary>
private readonly SemaphoreSlim _videoImageResourcePool = new SemaphoreSlim(1, 1);
/// <summary>
/// The audio image resource pool
/// </summary>
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private readonly SemaphoreSlim _audioImageResourcePool = new SemaphoreSlim(1, 1);
/// <summary>
/// The _subtitle extraction resource pool
/// </summary>
private readonly SemaphoreSlim _subtitleExtractionResourcePool = new SemaphoreSlim(2, 2);
/// <summary>
/// The FF probe resource pool
/// </summary>
private readonly SemaphoreSlim _ffProbeResourcePool = new SemaphoreSlim(2, 2);
/// <summary>
/// Gets or sets the versioned directory path.
/// </summary>
/// <value>The versioned directory path.</value>
private string VersionedDirectoryPath { get; set; }
/// <summary>
/// Initializes a new instance of the <see cref="MediaEncoder" /> class.
/// </summary>
/// <param name="logger">The logger.</param>
/// <param name="zipClient">The zip client.</param>
/// <param name="appPaths">The app paths.</param>
/// <param name="jsonSerializer">The json serializer.</param>
public MediaEncoder(ILogger logger, IZipClient zipClient, IApplicationPaths appPaths, IJsonSerializer jsonSerializer)
{
_logger = logger;
_zipClient = zipClient;
_appPaths = appPaths;
_jsonSerializer = jsonSerializer;
// Not crazy about this but it's the only way to suppress ffmpeg crash dialog boxes
SetErrorMode(ErrorModes.SEM_FAILCRITICALERRORS | ErrorModes.SEM_NOALIGNMENTFAULTEXCEPT | ErrorModes.SEM_NOGPFAULTERRORBOX | ErrorModes.SEM_NOOPENFILEERRORBOX);
Task.Run(() => VersionedDirectoryPath = GetVersionedDirectoryPath());
}
/// <summary>
/// The _media tools path
/// </summary>
private string _mediaToolsPath;
/// <summary>
/// Gets the folder path to tools
/// </summary>
/// <value>The media tools path.</value>
private string MediaToolsPath
{
get
{
if (_mediaToolsPath == null)
{
_mediaToolsPath = Path.Combine(_appPaths.ProgramDataPath, "ffmpeg");
if (!Directory.Exists(_mediaToolsPath))
{
Directory.CreateDirectory(_mediaToolsPath);
}
}
return _mediaToolsPath;
}
}
/// <summary>
/// Gets the encoder path.
/// </summary>
/// <value>The encoder path.</value>
public string EncoderPath
{
get { return FFMpegPath; }
}
/// <summary>
/// The _ FF MPEG path
/// </summary>
private string _FFMpegPath;
/// <summary>
/// Gets the path to ffmpeg.exe
/// </summary>
/// <value>The FF MPEG path.</value>
public string FFMpegPath
{
get
{
return _FFMpegPath ?? (_FFMpegPath = Path.Combine(VersionedDirectoryPath, "ffmpeg.exe"));
}
}
/// <summary>
/// The _ FF probe path
/// </summary>
private string _FFProbePath;
/// <summary>
/// Gets the path to ffprobe.exe
/// </summary>
/// <value>The FF probe path.</value>
private string FFProbePath
{
get
{
return _FFProbePath ?? (_FFProbePath = Path.Combine(VersionedDirectoryPath, "ffprobe.exe"));
}
}
/// <summary>
/// Gets the version.
/// </summary>
/// <value>The version.</value>
public string Version
{
get { return Path.GetFileNameWithoutExtension(VersionedDirectoryPath); }
}
/// <summary>
/// Gets the versioned directory path.
/// </summary>
/// <returns>System.String.</returns>
private string GetVersionedDirectoryPath()
{
var assembly = GetType().Assembly;
var prefix = GetType().Namespace + ".";
var srch = prefix + "ffmpeg";
var resource = assembly.GetManifestResourceNames().First(r => r.StartsWith(srch));
var filename = resource.Substring(resource.IndexOf(prefix, StringComparison.OrdinalIgnoreCase) + prefix.Length);
var versionedDirectoryPath = Path.Combine(MediaToolsPath, Path.GetFileNameWithoutExtension(filename));
if (!Directory.Exists(versionedDirectoryPath))
{
Directory.CreateDirectory(versionedDirectoryPath);
}
ExtractTools(assembly, resource, versionedDirectoryPath);
return versionedDirectoryPath;
}
/// <summary>
/// Extracts the tools.
/// </summary>
/// <param name="assembly">The assembly.</param>
/// <param name="zipFileResourcePath">The zip file resource path.</param>
/// <param name="targetPath">The target path.</param>
private void ExtractTools(Assembly assembly, string zipFileResourcePath, string targetPath)
{
using (var resourceStream = assembly.GetManifestResourceStream(zipFileResourcePath))
{
_zipClient.ExtractAll(resourceStream, targetPath, false);
}
ExtractFonts(assembly, targetPath);
}
/// <summary>
/// Extracts the fonts.
/// </summary>
/// <param name="assembly">The assembly.</param>
/// <param name="targetPath">The target path.</param>
private async void ExtractFonts(Assembly assembly, string targetPath)
{
var fontsDirectory = Path.Combine(targetPath, "fonts");
if (!Directory.Exists(fontsDirectory))
{
Directory.CreateDirectory(fontsDirectory);
}
const string fontFilename = "ARIALUNI.TTF";
var fontFile = Path.Combine(fontsDirectory, fontFilename);
if (!File.Exists(fontFile))
{
using (var stream = assembly.GetManifestResourceStream(GetType().Namespace + ".fonts." + fontFilename))
{
using (var fileStream = new FileStream(fontFile, FileMode.Create, FileAccess.Write, FileShare.Read, StreamDefaults.DefaultFileStreamBufferSize, FileOptions.Asynchronous))
{
await stream.CopyToAsync(fileStream).ConfigureAwait(false);
}
}
}
await ExtractFontConfigFile(assembly, fontsDirectory).ConfigureAwait(false);
}
/// <summary>
/// Extracts the font config file.
/// </summary>
/// <param name="assembly">The assembly.</param>
/// <param name="fontsDirectory">The fonts directory.</param>
/// <returns>Task.</returns>
private async Task ExtractFontConfigFile(Assembly assembly, string fontsDirectory)
{
const string fontConfigFilename = "fonts.conf";
var fontConfigFile = Path.Combine(fontsDirectory, fontConfigFilename);
if (!File.Exists(fontConfigFile))
{
using (var stream = assembly.GetManifestResourceStream(GetType().Namespace + ".fonts." + fontConfigFilename))
{
using (var streamReader = new StreamReader(stream))
{
var contents = await streamReader.ReadToEndAsync().ConfigureAwait(false);
contents = contents.Replace("<dir></dir>", "<dir>" + fontsDirectory + "</dir>");
var bytes = Encoding.UTF8.GetBytes(contents);
using (var fileStream = new FileStream(fontConfigFile, FileMode.Create, FileAccess.Write, FileShare.Read, StreamDefaults.DefaultFileStreamBufferSize, FileOptions.Asynchronous))
{
await fileStream.WriteAsync(bytes, 0, bytes.Length);
}
}
}
}
}
/// <summary>
/// Gets the media info.
/// </summary>
/// <param name="inputFiles">The input files.</param>
/// <param name="type">The type.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
public Task<MediaInfoResult> GetMediaInfo(string[] inputFiles, InputType type, CancellationToken cancellationToken)
{
return GetMediaInfoInternal(GetInputArgument(inputFiles, type), type != InputType.AudioFile, GetProbeSizeArgument(type), cancellationToken);
}
/// <summary>
/// Gets the input argument.
/// </summary>
/// <param name="inputFiles">The input files.</param>
/// <param name="type">The type.</param>
/// <returns>System.String.</returns>
/// <exception cref="System.ArgumentException">Unrecognized InputType</exception>
public string GetInputArgument(string[] inputFiles, InputType type)
{
string inputPath;
switch (type)
{
case InputType.Dvd:
case InputType.VideoFile:
case InputType.AudioFile:
inputPath = GetConcatInputArgument(inputFiles);
break;
case InputType.Bluray:
inputPath = GetBlurayInputArgument(inputFiles[0]);
break;
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case InputType.Url:
inputPath = GetHttpInputArgument(inputFiles);
break;
default:
throw new ArgumentException("Unrecognized InputType");
}
return inputPath;
}
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/// <summary>
/// Gets the HTTP input argument.
/// </summary>
/// <param name="inputFiles">The input files.</param>
/// <returns>System.String.</returns>
private string GetHttpInputArgument(string[] inputFiles)
{
var url = inputFiles[0];
return string.Format("\"{0}\"", url);
}
/// <summary>
/// Gets the probe size argument.
/// </summary>
/// <param name="type">The type.</param>
/// <returns>System.String.</returns>
public string GetProbeSizeArgument(InputType type)
{
return type == InputType.Dvd ? "-probesize 1G -analyzeduration 200M" : string.Empty;
}
/// <summary>
/// Gets the media info internal.
/// </summary>
/// <param name="inputPath">The input path.</param>
/// <param name="extractChapters">if set to <c>true</c> [extract chapters].</param>
/// <param name="probeSizeArgument">The probe size argument.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task{MediaInfoResult}.</returns>
/// <exception cref="System.ApplicationException"></exception>
private async Task<MediaInfoResult> GetMediaInfoInternal(string inputPath, bool extractChapters, string probeSizeArgument, CancellationToken cancellationToken)
{
var process = new Process
{
StartInfo = new ProcessStartInfo
{
CreateNoWindow = true,
UseShellExecute = false,
// Must consume both or ffmpeg may hang due to deadlocks. See comments below.
RedirectStandardOutput = true,
RedirectStandardError = true,
FileName = FFProbePath,
Arguments = string.Format("{0} -i {1} -threads 0 -v info -print_format json -show_streams -show_format", probeSizeArgument, inputPath).Trim(),
WindowStyle = ProcessWindowStyle.Hidden,
ErrorDialog = false
},
EnableRaisingEvents = true
};
_logger.Debug("{0} {1}", process.StartInfo.FileName, process.StartInfo.Arguments);
process.Exited += ProcessExited;
await _ffProbeResourcePool.WaitAsync(cancellationToken).ConfigureAwait(false);
MediaInfoResult result;
string standardError = null;
try
{
process.Start();
}
catch (Exception ex)
{
_ffProbeResourcePool.Release();
_logger.ErrorException("Error starting ffprobe", ex);
throw;
}
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try
{
Task<string> standardErrorReadTask = null;
// MUST read both stdout and stderr asynchronously or a deadlock may occurr
if (extractChapters)
{
standardErrorReadTask = process.StandardError.ReadToEndAsync();
}
else
{
process.BeginErrorReadLine();
}
result = _jsonSerializer.DeserializeFromStream<MediaInfoResult>(process.StandardOutput.BaseStream);
if (extractChapters)
{
standardError = await standardErrorReadTask.ConfigureAwait(false);
}
}
catch
{
// Hate having to do this
try
{
process.Kill();
}
catch (InvalidOperationException ex1)
{
_logger.ErrorException("Error killing ffprobe", ex1);
}
catch (Win32Exception ex1)
{
_logger.ErrorException("Error killing ffprobe", ex1);
}
throw;
}
finally
{
_ffProbeResourcePool.Release();
}
if (result == null)
{
throw new ApplicationException(string.Format("FFProbe failed for {0}", inputPath));
}
cancellationToken.ThrowIfCancellationRequested();
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if (result.streams != null)
{
// Normalize aspect ratio if invalid
foreach (var stream in result.streams)
{
if (string.Equals(stream.display_aspect_ratio, "0:1", StringComparison.OrdinalIgnoreCase))
{
stream.display_aspect_ratio = string.Empty;
}
if (string.Equals(stream.sample_aspect_ratio, "0:1", StringComparison.OrdinalIgnoreCase))
{
stream.sample_aspect_ratio = string.Empty;
}
}
}
if (extractChapters && !string.IsNullOrEmpty(standardError))
{
AddChapters(result, standardError);
}
return result;
}
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/// <summary>
/// The us culture
/// </summary>
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protected readonly CultureInfo UsCulture = new CultureInfo("en-US");
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/// <summary>
/// Adds the chapters.
/// </summary>
/// <param name="result">The result.</param>
/// <param name="standardError">The standard error.</param>
private void AddChapters(MediaInfoResult result, string standardError)
{
var lines = standardError.Split('\n').Select(l => l.TrimStart());
var chapters = new List<ChapterInfo>();
ChapterInfo lastChapter = null;
foreach (var line in lines)
{
if (line.StartsWith("Chapter", StringComparison.OrdinalIgnoreCase))
{
// Example:
// Chapter #0.2: start 400.534, end 4565.435
const string srch = "start ";
var start = line.IndexOf(srch, StringComparison.OrdinalIgnoreCase);
if (start == -1)
{
continue;
}
var subString = line.Substring(start + srch.Length);
subString = subString.Substring(0, subString.IndexOf(','));
double seconds;
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if (double.TryParse(subString, NumberStyles.Any, UsCulture, out seconds))
{
lastChapter = new ChapterInfo
{
StartPositionTicks = TimeSpan.FromSeconds(seconds).Ticks
};
chapters.Add(lastChapter);
}
}
else if (line.StartsWith("title", StringComparison.OrdinalIgnoreCase))
{
if (lastChapter != null && string.IsNullOrEmpty(lastChapter.Name))
{
var index = line.IndexOf(':');
if (index != -1)
{
lastChapter.Name = line.Substring(index + 1).Trim().TrimEnd('\r');
}
}
}
}
result.Chapters = chapters;
}
/// <summary>
/// Processes the exited.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="EventArgs" /> instance containing the event data.</param>
void ProcessExited(object sender, EventArgs e)
{
((Process)sender).Dispose();
}
/// <summary>
/// Converts the text subtitle to ass.
/// </summary>
/// <param name="inputPath">The input path.</param>
/// <param name="outputPath">The output path.</param>
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/// <param name="offset">The offset.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
/// <exception cref="System.ArgumentNullException">inputPath
/// or
/// outputPath</exception>
/// <exception cref="System.ApplicationException"></exception>
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public async Task ConvertTextSubtitleToAss(string inputPath, string outputPath, TimeSpan offset, CancellationToken cancellationToken)
{
if (string.IsNullOrEmpty(inputPath))
{
throw new ArgumentNullException("inputPath");
}
if (string.IsNullOrEmpty(outputPath))
{
throw new ArgumentNullException("outputPath");
}
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var offsetParam = offset.Ticks > 0 ? "-ss " + offset.TotalSeconds + " " : string.Empty;
var process = new Process
{
StartInfo = new ProcessStartInfo
{
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RedirectStandardOutput = false,
RedirectStandardError = true,
CreateNoWindow = true,
UseShellExecute = false,
FileName = FFMpegPath,
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Arguments = string.Format("{0}-i \"{1}\" \"{2}\"", offsetParam, inputPath, outputPath),
WindowStyle = ProcessWindowStyle.Hidden,
ErrorDialog = false
}
};
_logger.Debug("{0} {1}", process.StartInfo.FileName, process.StartInfo.Arguments);
await _subtitleExtractionResourcePool.WaitAsync(cancellationToken).ConfigureAwait(false);
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var logFilePath = Path.Combine(_appPaths.LogDirectoryPath, "ffmpeg-sub-convert-" + Guid.NewGuid() + ".txt");
var logFileStream = new FileStream(logFilePath, FileMode.Create, FileAccess.Write, FileShare.Read, StreamDefaults.DefaultFileStreamBufferSize, FileOptions.Asynchronous);
try
{
process.Start();
}
catch (Exception ex)
{
_subtitleExtractionResourcePool.Release();
logFileStream.Dispose();
_logger.ErrorException("Error starting ffmpeg", ex);
throw;
}
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var logTask = process.StandardError.BaseStream.CopyToAsync(logFileStream);
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var ranToCompletion = process.WaitForExit(60000);
if (!ranToCompletion)
{
try
{
_logger.Info("Killing ffmpeg process");
process.Kill();
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process.WaitForExit(1000);
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await logTask.ConfigureAwait(false);
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}
catch (Win32Exception ex)
{
_logger.ErrorException("Error killing process", ex);
}
catch (InvalidOperationException ex)
{
_logger.ErrorException("Error killing process", ex);
}
catch (NotSupportedException ex)
{
_logger.ErrorException("Error killing process", ex);
}
finally
{
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logFileStream.Dispose();
_subtitleExtractionResourcePool.Release();
}
}
var exitCode = ranToCompletion ? process.ExitCode : -1;
process.Dispose();
var failed = false;
if (exitCode == -1)
{
failed = true;
if (File.Exists(outputPath))
{
try
{
_logger.Info("Deleting converted subtitle due to failure: ", outputPath);
File.Delete(outputPath);
}
catch (IOException ex)
{
_logger.ErrorException("Error deleting converted subtitle {0}", ex, outputPath);
}
}
}
else if (!File.Exists(outputPath))
{
failed = true;
}
if (failed)
{
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var msg = string.Format("ffmpeg subtitle converted failed for {0}", inputPath);
_logger.Error(msg);
throw new ApplicationException(msg);
}
}
/// <summary>
/// Extracts the text subtitle.
/// </summary>
/// <param name="inputFiles">The input files.</param>
/// <param name="type">The type.</param>
/// <param name="subtitleStreamIndex">Index of the subtitle stream.</param>
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/// <param name="offset">The offset.</param>
/// <param name="outputPath">The output path.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
/// <exception cref="System.ArgumentException">Must use inputPath list overload</exception>
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public Task ExtractTextSubtitle(string[] inputFiles, InputType type, int subtitleStreamIndex, TimeSpan offset, string outputPath, CancellationToken cancellationToken)
{
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return ExtractTextSubtitleInternal(GetInputArgument(inputFiles, type), subtitleStreamIndex, offset, outputPath, cancellationToken);
}
/// <summary>
/// Extracts the text subtitle.
/// </summary>
/// <param name="inputPath">The input path.</param>
/// <param name="subtitleStreamIndex">Index of the subtitle stream.</param>
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/// <param name="offset">The offset.</param>
/// <param name="outputPath">The output path.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
/// <exception cref="System.ArgumentNullException">inputPath
/// or
/// outputPath
/// or
/// cancellationToken</exception>
/// <exception cref="System.ApplicationException"></exception>
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private async Task ExtractTextSubtitleInternal(string inputPath, int subtitleStreamIndex, TimeSpan offset, string outputPath, CancellationToken cancellationToken)
{
if (string.IsNullOrEmpty(inputPath))
{
throw new ArgumentNullException("inputPath");
}
if (string.IsNullOrEmpty(outputPath))
{
throw new ArgumentNullException("outputPath");
}
if (cancellationToken == null)
{
throw new ArgumentNullException("cancellationToken");
}
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var offsetParam = offset.Ticks > 0 ? "-ss " + offset.TotalSeconds + " " : string.Empty;
var process = new Process
{
StartInfo = new ProcessStartInfo
{
CreateNoWindow = true,
UseShellExecute = false,
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RedirectStandardOutput = false,
RedirectStandardError = true,
FileName = FFMpegPath,
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Arguments = string.Format("{0}-i {1} -map 0:{2} -an -vn -c:s ass \"{3}\"", offsetParam, inputPath, subtitleStreamIndex, outputPath),
WindowStyle = ProcessWindowStyle.Hidden,
ErrorDialog = false
}
};
_logger.Debug("{0} {1}", process.StartInfo.FileName, process.StartInfo.Arguments);
await _subtitleExtractionResourcePool.WaitAsync(cancellationToken).ConfigureAwait(false);
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var logFilePath = Path.Combine(_appPaths.LogDirectoryPath, "ffmpeg-sub-extract-" + Guid.NewGuid() + ".txt");
var logFileStream = new FileStream(logFilePath, FileMode.Create, FileAccess.Write, FileShare.Read, StreamDefaults.DefaultFileStreamBufferSize, FileOptions.Asynchronous);
try
{
process.Start();
}
catch (Exception ex)
{
_subtitleExtractionResourcePool.Release();
logFileStream.Dispose();
_logger.ErrorException("Error starting ffmpeg", ex);
throw;
}
process.StandardError.BaseStream.CopyToAsync(logFileStream);
var ranToCompletion = process.WaitForExit(60000);
if (!ranToCompletion)
{
try
{
_logger.Info("Killing ffmpeg process");
process.Kill();
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process.WaitForExit(1000);
}
catch (Win32Exception ex)
{
_logger.ErrorException("Error killing process", ex);
}
catch (InvalidOperationException ex)
{
_logger.ErrorException("Error killing process", ex);
}
catch (NotSupportedException ex)
{
_logger.ErrorException("Error killing process", ex);
}
finally
{
logFileStream.Dispose();
_subtitleExtractionResourcePool.Release();
}
}
var exitCode = ranToCompletion ? process.ExitCode : -1;
process.Dispose();
var failed = false;
if (exitCode == -1)
{
failed = true;
if (File.Exists(outputPath))
{
try
{
_logger.Info("Deleting extracted subtitle due to failure: ", outputPath);
File.Delete(outputPath);
}
catch (IOException ex)
{
_logger.ErrorException("Error deleting extracted subtitle {0}", ex, outputPath);
}
}
}
else if (!File.Exists(outputPath))
{
failed = true;
}
if (failed)
{
var msg = string.Format("ffmpeg subtitle extraction failed for {0}", inputPath);
_logger.Error(msg);
throw new ApplicationException(msg);
}
}
/// <summary>
/// Extracts the image.
/// </summary>
/// <param name="inputFiles">The input files.</param>
/// <param name="type">The type.</param>
/// <param name="offset">The offset.</param>
/// <param name="outputPath">The output path.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
/// <exception cref="System.ArgumentException">Must use inputPath list overload</exception>
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public async Task ExtractImage(string[] inputFiles, InputType type, TimeSpan? offset, string outputPath, CancellationToken cancellationToken)
{
var resourcePool = type == InputType.AudioFile ? _audioImageResourcePool : _videoImageResourcePool;
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var inputArgument = GetInputArgument(inputFiles, type);
if (type != InputType.AudioFile)
{
try
{
await ExtractImageInternal(inputArgument, type, offset, outputPath, true, resourcePool, cancellationToken).ConfigureAwait(false);
return;
}
catch
{
_logger.Error("I-frame image extraction failed, will attempt standard way. Input: {0}", inputArgument);
}
}
await ExtractImageInternal(inputArgument, type, offset, outputPath, false, resourcePool, cancellationToken).ConfigureAwait(false);
}
/// <summary>
/// Extracts the image.
/// </summary>
/// <param name="inputPath">The input path.</param>
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/// <param name="type">The type.</param>
/// <param name="offset">The offset.</param>
/// <param name="outputPath">The output path.</param>
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/// <param name="useIFrame">if set to <c>true</c> [use I frame].</param>
/// <param name="resourcePool">The resource pool.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
/// <exception cref="System.ArgumentNullException">inputPath
/// or
/// outputPath</exception>
/// <exception cref="System.ApplicationException"></exception>
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private async Task ExtractImageInternal(string inputPath, InputType type, TimeSpan? offset, string outputPath, bool useIFrame, SemaphoreSlim resourcePool, CancellationToken cancellationToken)
{
if (string.IsNullOrEmpty(inputPath))
{
throw new ArgumentNullException("inputPath");
}
if (string.IsNullOrEmpty(outputPath))
{
throw new ArgumentNullException("outputPath");
}
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var args = useIFrame ? string.Format("-i {0} -threads 0 -v quiet -vframes 1 -filter:v select=\"eq(pict_type\\,I)\" -vf \"scale=iw*sar:ih, scale=600:-1\" -f image2 \"{1}\"", inputPath, outputPath) :
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string.Format("-i {0} -threads 0 -v quiet -vframes 1 -vf \"scale=iw*sar:ih, scale=600:-1\" -f image2 \"{1}\"", inputPath, outputPath);
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var probeSize = GetProbeSizeArgument(type);
if (!string.IsNullOrEmpty(probeSize))
{
args = probeSize + " " + args;
}
if (offset.HasValue)
{
args = string.Format("-ss {0} ", Convert.ToInt32(offset.Value.TotalSeconds)) + args;
}
var process = new Process
{
StartInfo = new ProcessStartInfo
{
CreateNoWindow = true,
UseShellExecute = false,
FileName = FFMpegPath,
Arguments = args,
WindowStyle = ProcessWindowStyle.Hidden,
ErrorDialog = false
}
};
await resourcePool.WaitAsync(cancellationToken).ConfigureAwait(false);
var ranToCompletion = StartAndWaitForProcess(process);
resourcePool.Release();
var exitCode = ranToCompletion ? process.ExitCode : -1;
process.Dispose();
var failed = false;
if (exitCode == -1)
{
failed = true;
if (File.Exists(outputPath))
{
try
{
_logger.Info("Deleting extracted image due to failure: ", outputPath);
File.Delete(outputPath);
}
catch (IOException ex)
{
_logger.ErrorException("Error deleting extracted image {0}", ex, outputPath);
}
}
}
else if (!File.Exists(outputPath))
{
failed = true;
}
if (failed)
{
var msg = string.Format("ffmpeg image extraction failed for {0}", inputPath);
_logger.Error(msg);
throw new ApplicationException(msg);
}
}
/// <summary>
/// Starts the and wait for process.
/// </summary>
/// <param name="process">The process.</param>
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/// <param name="timeout">The timeout.</param>
/// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
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private bool StartAndWaitForProcess(Process process, int timeout = 10000)
{
process.Start();
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var ranToCompletion = process.WaitForExit(timeout);
if (!ranToCompletion)
{
try
{
_logger.Info("Killing ffmpeg process");
process.Kill();
process.WaitForExit(1000);
}
catch (Win32Exception ex)
{
_logger.ErrorException("Error killing process", ex);
}
catch (InvalidOperationException ex)
{
_logger.ErrorException("Error killing process", ex);
}
catch (NotSupportedException ex)
{
_logger.ErrorException("Error killing process", ex);
}
}
return ranToCompletion;
}
/// <summary>
/// Gets the file input argument.
/// </summary>
/// <param name="path">The path.</param>
/// <returns>System.String.</returns>
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private string GetFileInputArgument(string path)
{
return string.Format("file:\"{0}\"", path);
}
/// <summary>
/// Gets the concat input argument.
/// </summary>
/// <param name="playableStreamFiles">The playable stream files.</param>
/// <returns>System.String.</returns>
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private string GetConcatInputArgument(string[] playableStreamFiles)
{
// Get all streams
// If there's more than one we'll need to use the concat command
if (playableStreamFiles.Length > 1)
{
var files = string.Join("|", playableStreamFiles);
return string.Format("concat:\"{0}\"", files);
}
// Determine the input path for video files
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return GetFileInputArgument(playableStreamFiles[0]);
}
/// <summary>
/// Gets the bluray input argument.
/// </summary>
/// <param name="blurayRoot">The bluray root.</param>
/// <returns>System.String.</returns>
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private string GetBlurayInputArgument(string blurayRoot)
{
return string.Format("bluray:\"{0}\"", blurayRoot);
}
/// <summary>
/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
/// </summary>
public void Dispose()
{
Dispose(true);
}
/// <summary>
/// Releases unmanaged and - optionally - managed resources.
/// </summary>
/// <param name="dispose"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
protected virtual void Dispose(bool dispose)
{
if (dispose)
{
_videoImageResourcePool.Dispose();
}
SetErrorMode(ErrorModes.SYSTEM_DEFAULT);
}
/// <summary>
/// Sets the error mode.
/// </summary>
/// <param name="uMode">The u mode.</param>
/// <returns>ErrorModes.</returns>
[DllImport("kernel32.dll")]
static extern ErrorModes SetErrorMode(ErrorModes uMode);
/// <summary>
/// Enum ErrorModes
/// </summary>
[Flags]
public enum ErrorModes : uint
{
/// <summary>
/// The SYSTE m_ DEFAULT
/// </summary>
SYSTEM_DEFAULT = 0x0,
/// <summary>
/// The SE m_ FAILCRITICALERRORS
/// </summary>
SEM_FAILCRITICALERRORS = 0x0001,
/// <summary>
/// The SE m_ NOALIGNMENTFAULTEXCEPT
/// </summary>
SEM_NOALIGNMENTFAULTEXCEPT = 0x0004,
/// <summary>
/// The SE m_ NOGPFAULTERRORBOX
/// </summary>
SEM_NOGPFAULTERRORBOX = 0x0002,
/// <summary>
/// The SE m_ NOOPENFILEERRORBOX
/// </summary>
SEM_NOOPENFILEERRORBOX = 0x8000
}
}
}