public static int GetNumberOfThreads(InternalEncodingTask state, bool isWebm)
{
// Use more when this is true. -re will keep cpu usage under control
if (state.ReadInputAtNativeFramerate)
{
if (isWebm)
{
return(Math.Max(Environment.ProcessorCount - 1, 2));
}
return(0);
}
// Webm: http://www.webmproject.org/docs/encoder-parameters/
// The decoder will usually automatically use an appropriate number of threads according to how many cores are available but it can only use multiple threads
// for the coefficient data if the encoder selected --token-parts > 0 at encode time.
switch (state.QualitySetting)
{
case EncodingQuality.HighSpeed:
return(2);
case EncodingQuality.HighQuality:
return(2);
case EncodingQuality.MaxQuality:
return(isWebm ? Math.Max(Environment.ProcessorCount - 1, 2) : 0);
default:
throw new Exception("Unrecognized MediaEncodingQuality value.");
}
}
private string GetOutputModifier(InternalEncodingTask task)
{
var options = task.Request;
var audioTranscodeParams = new List <string>
{
"-threads " + EncodingUtils.GetNumberOfThreads(task, false).ToString(_usCulture),
"-vn"
};
var bitrate = EncodingUtils.GetAudioBitrateParam(task);
if (bitrate.HasValue)
{
audioTranscodeParams.Add("-ab " + bitrate.Value.ToString(_usCulture));
}
var channels = EncodingUtils.GetNumAudioChannelsParam(options, task.AudioStream);
if (channels.HasValue)
{
audioTranscodeParams.Add("-ac " + channels.Value);
}
if (options.AudioSampleRate.HasValue)
{
audioTranscodeParams.Add("-ar " + options.AudioSampleRate.Value);
}
return(string.Join(" ", audioTranscodeParams.ToArray()));
}
private string GetOutputModifier(InternalEncodingTask task)
{
var options = task.Request;
var audioTranscodeParams = new List<string>
{
"-threads " + EncodingUtils.GetNumberOfThreads(task, false).ToString(_usCulture),
"-vn"
};
var bitrate = EncodingUtils.GetAudioBitrateParam(task);
if (bitrate.HasValue)
{
audioTranscodeParams.Add("-ab " + bitrate.Value.ToString(_usCulture));
}
var channels = EncodingUtils.GetNumAudioChannelsParam(options, task.AudioStream);
if (channels.HasValue)
{
audioTranscodeParams.Add("-ac " + channels.Value);
}
if (options.AudioSampleRate.HasValue)
{
audioTranscodeParams.Add("-ar " + options.AudioSampleRate.Value);
}
return string.Join(" ", audioTranscodeParams.ToArray());
}
private string GetArguments(InternalEncodingTask task, string mountedPath)
{
var options = task.Request;
return(string.Format("{0} -i {1} {2} -id3v2_version 3 -write_id3v1 1 \"{3}\"",
GetInputModifier(task),
GetInputArgument(task),
GetOutputModifier(task),
options.OutputPath).Trim());
}
private string GetArguments(InternalEncodingTask task, string mountedPath)
{
var options = task.Request;
return string.Format("{0} -i {1} {2} -id3v2_version 3 -write_id3v1 1 \"{3}\"",
GetInputModifier(task),
GetInputArgument(task),
GetOutputModifier(task),
options.OutputPath).Trim();
}
public static int?GetAudioBitrateParam(InternalEncodingTask task)
{
if (task.Request.AudioBitRate.HasValue)
{
// Make sure we don't request a bitrate higher than the source
var currentBitrate = task.AudioStream == null ? task.Request.AudioBitRate.Value : task.AudioStream.BitRate ?? task.Request.AudioBitRate.Value;
return(Math.Min(currentBitrate, task.Request.AudioBitRate.Value));
}
return(null);
}
private void ApplyDeviceProfileSettings(InternalEncodingTask state)
{
var profile = state.Request.DeviceProfile;
if (profile == null)
{
// Don't use settings from the default profile.
// Only use a specific profile if it was requested.
return;
}
var container = state.Request.Container;
var audioCodec = state.Request.AudioCodec;
if (string.Equals(audioCodec, "copy", StringComparison.OrdinalIgnoreCase) && state.AudioStream != null)
{
audioCodec = state.AudioStream.Codec;
}
var videoCodec = state.VideoRequest == null ? null : state.VideoRequest.VideoCodec;
if (string.Equals(videoCodec, "copy", StringComparison.OrdinalIgnoreCase) && state.VideoStream != null)
{
videoCodec = state.VideoStream.Codec;
}
//var mediaProfile = state.VideoRequest == null ?
// profile.GetAudioMediaProfile(container, audioCodec) :
// profile.GetVideoMediaProfile(container, audioCodec, videoCodec, state.AudioStream, state.VideoStream);
//if (mediaProfile != null)
//{
// state.MimeType = mediaProfile.MimeType;
// state.OrgPn = mediaProfile.OrgPn;
//}
//var transcodingProfile = state.VideoRequest == null ?
// profile.GetAudioTranscodingProfile(container, audioCodec) :
// profile.GetVideoTranscodingProfile(container, audioCodec, videoCodec);
//if (transcodingProfile != null)
//{
// //state.EstimateContentLength = transcodingProfile.EstimateContentLength;
// state.EnableMpegtsM2TsMode = transcodingProfile.EnableMpegtsM2TsMode;
// //state.TranscodeSeekInfo = transcodingProfile.TranscodeSeekInfo;
// if (state.VideoRequest != null && string.IsNullOrWhiteSpace(state.VideoRequest.VideoProfile))
// {
// state.VideoRequest.VideoProfile = transcodingProfile.VideoProfile;
// }
//}
}
private static string GetCommonInputModifier(InternalEncodingTask options)
{
var inputModifier = string.Empty;
if (options.EnableDebugLogging)
{
inputModifier += "-loglevel debug";
}
var probeSize = GetProbeSizeArgument(options.InputVideoType.HasValue && options.InputVideoType.Value == VideoType.Dvd);
inputModifier += " " + probeSize;
inputModifier = inputModifier.Trim();
if (!string.IsNullOrWhiteSpace(options.UserAgent))
{
inputModifier += " -user-agent \"" + options.UserAgent + "\"";
}
inputModifier += " " + GetFastSeekValue(options.Request);
inputModifier = inputModifier.Trim();
if (!string.IsNullOrEmpty(options.InputFormat))
{
inputModifier += " -f " + options.InputFormat;
}
if (!string.IsNullOrEmpty(options.InputAudioCodec))
{
inputModifier += " -acodec " + options.InputAudioCodec;
}
if (!string.IsNullOrEmpty(options.InputAudioSync))
{
inputModifier += " -async " + options.InputAudioSync;
}
if (options.ReadInputAtNativeFramerate)
{
inputModifier += " -re";
}
return(inputModifier);
}
public static string GetInputModifier(InternalEncodingTask options)
{
var inputModifier = GetCommonInputModifier(options);
//if (state.VideoRequest != null)
//{
// inputModifier += " -fflags genpts";
//}
//if (!string.IsNullOrEmpty(state.InputVideoCodec))
//{
// inputModifier += " -vcodec " + state.InputVideoCodec;
//}
//if (!string.IsNullOrEmpty(state.InputVideoSync))
//{
// inputModifier += " -vsync " + state.InputVideoSync;
//}
return inputModifier;
}
public static string GetInputModifier(InternalEncodingTask options)
{
var inputModifier = GetCommonInputModifier(options);
//if (state.VideoRequest != null)
//{
// inputModifier += " -fflags genpts";
//}
//if (!string.IsNullOrEmpty(state.InputVideoCodec))
//{
// inputModifier += " -vcodec " + state.InputVideoCodec;
//}
//if (!string.IsNullOrEmpty(state.InputVideoSync))
//{
// inputModifier += " -vsync " + state.InputVideoSync;
//}
return(inputModifier);
}
public static int? GetAudioBitrateParam(InternalEncodingTask task)
{
if (task.Request.AudioBitRate.HasValue)
{
// Make sure we don't request a bitrate higher than the source
var currentBitrate = task.AudioStream == null ? task.Request.AudioBitRate.Value : task.AudioStream.BitRate ?? task.Request.AudioBitRate.Value;
return Math.Min(currentBitrate, task.Request.AudioBitRate.Value);
}
return null;
}
public async Task Start(InternalEncodingTask task, Func <InternalEncodingTask, string, string> argumentsFactory)
{
_task = task;
if (!File.Exists(_ffmpegPath))
{
throw new InvalidOperationException("ffmpeg was not found at " + _ffmpegPath);
}
Directory.CreateDirectory(Path.GetDirectoryName(task.Request.OutputPath));
string mountedPath = null;
if (task.InputVideoType.HasValue && task.InputVideoType == VideoType.Iso && task.IsoType.HasValue)
{
if (_isoManager.CanMount(task.MediaPath))
{
_isoMount = await _isoManager.Mount(task.MediaPath, CancellationToken.None).ConfigureAwait(false);
mountedPath = _isoMount.MountedPath;
}
}
var process = new Process
{
StartInfo = new ProcessStartInfo
{
CreateNoWindow = true,
UseShellExecute = false,
// Must consume both stdout and stderr or deadlocks may occur
RedirectStandardOutput = true,
RedirectStandardError = true,
FileName = _ffmpegPath,
WorkingDirectory = Path.GetDirectoryName(_ffmpegPath),
Arguments = argumentsFactory(task, mountedPath),
WindowStyle = ProcessWindowStyle.Hidden,
ErrorDialog = false
},
EnableRaisingEvents = true
};
_logger.Info(process.StartInfo.FileName + " " + process.StartInfo.Arguments);
var logFilePath = Path.Combine(_appPaths.LogDirectoryPath, "ffmpeg-" + task.Id + ".txt");
Directory.CreateDirectory(Path.GetDirectoryName(logFilePath));
// FFMpeg writes debug/error info to stderr. This is useful when debugging so let's put it in the log directory.
_logFileStream = _fileSystem.GetFileStream(logFilePath, FileMode.Create, FileAccess.Write, FileShare.Read, true);
process.Exited += process_Exited;
try
{
process.Start();
}
catch (Exception ex)
{
_logger.ErrorException("Error starting ffmpeg", ex);
task.OnError();
DisposeLogFileStream();
process.Dispose();
throw;
}
task.OnBegin();
// MUST read both stdout and stderr asynchronously or a deadlock may occurr
process.BeginOutputReadLine();
#pragma warning disable 4014
// Important - don't await the log task or we won't be able to kill ffmpeg when the user stops playback
process.StandardError.BaseStream.CopyToAsync(_logFileStream);
#pragma warning restore 4014
}
public async Task<InternalEncodingTask> Create(EncodingOptions request, CancellationToken cancellationToken)
{
ValidateInput(request);
var state = new InternalEncodingTask
{
Request = request
};
var item = string.IsNullOrEmpty(request.MediaSourceId) ?
_libraryManager.GetItemById(new Guid(request.ItemId)) :
_libraryManager.GetItemById(new Guid(request.MediaSourceId));
if (item is ILiveTvRecording)
{
var recording = await _liveTvManager.GetInternalRecording(request.ItemId, cancellationToken).ConfigureAwait(false);
if (string.Equals(recording.MediaType, MediaType.Video, StringComparison.OrdinalIgnoreCase))
{
state.InputVideoType = VideoType.VideoFile;
}
var path = recording.RecordingInfo.Path;
var mediaUrl = recording.RecordingInfo.Url;
if (string.IsNullOrWhiteSpace(path) && string.IsNullOrWhiteSpace(mediaUrl))
{
var streamInfo = await _liveTvManager.GetRecordingStream(request.ItemId, cancellationToken).ConfigureAwait(false);
state.LiveTvStreamId = streamInfo.Id;
path = streamInfo.Path;
mediaUrl = streamInfo.Url;
}
if (!string.IsNullOrEmpty(path) && File.Exists(path))
{
state.MediaPath = path;
state.IsInputRemote = false;
}
else if (!string.IsNullOrEmpty(mediaUrl))
{
state.MediaPath = mediaUrl;
state.IsInputRemote = true;
}
state.InputRunTimeTicks = recording.RunTimeTicks;
if (recording.RecordingInfo.Status == RecordingStatus.InProgress && !state.IsInputRemote)
{
await Task.Delay(1000, cancellationToken).ConfigureAwait(false);
}
state.ReadInputAtNativeFramerate = recording.RecordingInfo.Status == RecordingStatus.InProgress;
state.AudioSync = "1000";
state.DeInterlace = true;
state.InputVideoSync = "-1";
state.InputAudioSync = "1";
}
else if (item is LiveTvChannel)
{
var channel = _liveTvManager.GetInternalChannel(request.ItemId);
if (string.Equals(channel.MediaType, MediaType.Video, StringComparison.OrdinalIgnoreCase))
{
state.InputVideoType = VideoType.VideoFile;
}
var streamInfo = await _liveTvManager.GetChannelStream(request.ItemId, cancellationToken).ConfigureAwait(false);
state.LiveTvStreamId = streamInfo.Id;
if (!string.IsNullOrEmpty(streamInfo.Path) && File.Exists(streamInfo.Path))
{
state.MediaPath = streamInfo.Path;
state.IsInputRemote = false;
await Task.Delay(1000, cancellationToken).ConfigureAwait(false);
}
else if (!string.IsNullOrEmpty(streamInfo.Url))
{
state.MediaPath = streamInfo.Url;
state.IsInputRemote = true;
}
state.ReadInputAtNativeFramerate = true;
state.AudioSync = "1000";
state.DeInterlace = true;
state.InputVideoSync = "-1";
state.InputAudioSync = "1";
}
else
{
state.MediaPath = item.Path;
state.IsInputRemote = item.LocationType == LocationType.Remote;
var video = item as Video;
if (video != null)
{
state.InputVideoType = video.VideoType;
state.IsoType = video.IsoType;
state.StreamFileNames = video.PlayableStreamFileNames.ToList();
}
state.InputRunTimeTicks = item.RunTimeTicks;
}
var videoRequest = request as VideoEncodingOptions;
var mediaStreams = _itemRepo.GetMediaStreams(new MediaStreamQuery
{
ItemId = item.Id
}).ToList();
if (videoRequest != null)
{
state.VideoStream = GetMediaStream(mediaStreams, videoRequest.VideoStreamIndex, MediaStreamType.Video);
state.SubtitleStream = GetMediaStream(mediaStreams, videoRequest.SubtitleStreamIndex, MediaStreamType.Subtitle, false);
state.AudioStream = GetMediaStream(mediaStreams, videoRequest.AudioStreamIndex, MediaStreamType.Audio);
if (state.VideoStream != null && state.VideoStream.IsInterlaced)
{
state.DeInterlace = true;
}
}
else
{
state.AudioStream = GetMediaStream(mediaStreams, null, MediaStreamType.Audio, true);
}
state.HasMediaStreams = mediaStreams.Count > 0;
state.SegmentLength = state.ReadInputAtNativeFramerate ? 5 : 10;
state.HlsListSize = state.ReadInputAtNativeFramerate ? 100 : 1440;
state.QualitySetting = GetQualitySetting();
ApplyDeviceProfileSettings(state);
return state;
}
private string GetInputArgument(InternalEncodingTask task)
{
return(EncodingUtils.GetInputArgument(new List <string> {
task.MediaPath
}, task.IsInputRemote));
}
private string GetInputModifier(InternalEncodingTask task)
{
return(EncodingUtils.GetInputModifier(task));
}
public static string GetAudioInputModifier(InternalEncodingTask options)
{
return(GetCommonInputModifier(options));
}
public Task BeginEncoding(InternalEncodingTask task)
{
return new FFMpegProcess(_ffmpegPath, _logger, _fileSystem, _appPaths, _isoManager, _liveTvManager).Start(task, GetArguments);
}
public async Task <InternalEncodingTask> Create(EncodingOptions request, CancellationToken cancellationToken)
{
ValidateInput(request);
var state = new InternalEncodingTask
{
Request = request
};
var item = string.IsNullOrEmpty(request.MediaSourceId) ?
_libraryManager.GetItemById(new Guid(request.ItemId)) :
_libraryManager.GetItemById(new Guid(request.MediaSourceId));
if (item is ILiveTvRecording)
{
var recording = await _liveTvManager.GetInternalRecording(request.ItemId, cancellationToken).ConfigureAwait(false);
if (string.Equals(recording.MediaType, MediaType.Video, StringComparison.OrdinalIgnoreCase))
{
state.InputVideoType = VideoType.VideoFile;
}
var path = recording.RecordingInfo.Path;
var mediaUrl = recording.RecordingInfo.Url;
if (string.IsNullOrWhiteSpace(path) && string.IsNullOrWhiteSpace(mediaUrl))
{
var streamInfo = await _liveTvManager.GetRecordingStream(request.ItemId, cancellationToken).ConfigureAwait(false);
state.LiveTvStreamId = streamInfo.Id;
path = streamInfo.Path;
mediaUrl = streamInfo.Url;
}
if (!string.IsNullOrEmpty(path) && File.Exists(path))
{
state.MediaPath = path;
state.IsInputRemote = false;
}
else if (!string.IsNullOrEmpty(mediaUrl))
{
state.MediaPath = mediaUrl;
state.IsInputRemote = true;
}
state.InputRunTimeTicks = recording.RunTimeTicks;
if (recording.RecordingInfo.Status == RecordingStatus.InProgress && !state.IsInputRemote)
{
await Task.Delay(1000, cancellationToken).ConfigureAwait(false);
}
state.ReadInputAtNativeFramerate = recording.RecordingInfo.Status == RecordingStatus.InProgress;
state.AudioSync = "1000";
state.DeInterlace = true;
state.InputVideoSync = "-1";
state.InputAudioSync = "1";
}
else if (item is LiveTvChannel)
{
var channel = _liveTvManager.GetInternalChannel(request.ItemId);
if (string.Equals(channel.MediaType, MediaType.Video, StringComparison.OrdinalIgnoreCase))
{
state.InputVideoType = VideoType.VideoFile;
}
var streamInfo = await _liveTvManager.GetChannelStream(request.ItemId, cancellationToken).ConfigureAwait(false);
state.LiveTvStreamId = streamInfo.Id;
if (!string.IsNullOrEmpty(streamInfo.Path) && File.Exists(streamInfo.Path))
{
state.MediaPath = streamInfo.Path;
state.IsInputRemote = false;
await Task.Delay(1000, cancellationToken).ConfigureAwait(false);
}
else if (!string.IsNullOrEmpty(streamInfo.Url))
{
state.MediaPath = streamInfo.Url;
state.IsInputRemote = true;
}
state.ReadInputAtNativeFramerate = true;
state.AudioSync = "1000";
state.DeInterlace = true;
state.InputVideoSync = "-1";
state.InputAudioSync = "1";
}
else
{
state.MediaPath = item.Path;
state.IsInputRemote = item.LocationType == LocationType.Remote;
var video = item as Video;
if (video != null)
{
state.InputVideoType = video.VideoType;
state.IsoType = video.IsoType;
state.StreamFileNames = video.PlayableStreamFileNames.ToList();
}
state.InputRunTimeTicks = item.RunTimeTicks;
}
var videoRequest = request as VideoEncodingOptions;
var mediaStreams = _itemRepo.GetMediaStreams(new MediaStreamQuery
{
ItemId = item.Id
}).ToList();
if (videoRequest != null)
{
state.VideoStream = GetMediaStream(mediaStreams, videoRequest.VideoStreamIndex, MediaStreamType.Video);
state.SubtitleStream = GetMediaStream(mediaStreams, videoRequest.SubtitleStreamIndex, MediaStreamType.Subtitle, false);
state.AudioStream = GetMediaStream(mediaStreams, videoRequest.AudioStreamIndex, MediaStreamType.Audio);
if (state.VideoStream != null && state.VideoStream.IsInterlaced)
{
state.DeInterlace = true;
}
}
else
{
state.AudioStream = GetMediaStream(mediaStreams, null, MediaStreamType.Audio, true);
}
state.HasMediaStreams = mediaStreams.Count > 0;
state.SegmentLength = state.ReadInputAtNativeFramerate ? 5 : 10;
state.HlsListSize = state.ReadInputAtNativeFramerate ? 100 : 1440;
state.QualitySetting = GetQualitySetting();
ApplyDeviceProfileSettings(state);
return(state);
}
private void ApplyDeviceProfileSettings(InternalEncodingTask state)
{
var profile = state.Request.DeviceProfile;
if (profile == null)
{
// Don't use settings from the default profile.
// Only use a specific profile if it was requested.
return;
}
var container = state.Request.Container;
var audioCodec = state.Request.AudioCodec;
if (string.Equals(audioCodec, "copy", StringComparison.OrdinalIgnoreCase) && state.AudioStream != null)
{
audioCodec = state.AudioStream.Codec;
}
var videoCodec = state.VideoRequest == null ? null : state.VideoRequest.VideoCodec;
if (string.Equals(videoCodec, "copy", StringComparison.OrdinalIgnoreCase) && state.VideoStream != null)
{
videoCodec = state.VideoStream.Codec;
}
var mediaProfile = state.VideoRequest == null ?
profile.GetAudioMediaProfile(container, audioCodec, state.AudioStream) :
profile.GetVideoMediaProfile(container, audioCodec, videoCodec, state.AudioStream, state.VideoStream);
if (mediaProfile != null)
{
state.MimeType = mediaProfile.MimeType;
state.OrgPn = mediaProfile.OrgPn;
}
var transcodingProfile = state.VideoRequest == null ?
profile.GetAudioTranscodingProfile(container, audioCodec) :
profile.GetVideoTranscodingProfile(container, audioCodec, videoCodec);
if (transcodingProfile != null)
{
//state.EstimateContentLength = transcodingProfile.EstimateContentLength;
state.EnableMpegtsM2TsMode = transcodingProfile.EnableMpegtsM2TsMode;
//state.TranscodeSeekInfo = transcodingProfile.TranscodeSeekInfo;
if (state.VideoRequest != null && string.IsNullOrWhiteSpace(state.VideoRequest.VideoProfile))
{
state.VideoRequest.VideoProfile = transcodingProfile.VideoProfile;
}
}
}
private string GetInputArgument(InternalEncodingTask task)
{
return EncodingUtils.GetInputArgument(new List<string> { task.MediaPath }, task.IsInputRemote);
}
private string GetInputModifier(InternalEncodingTask task)
{
return EncodingUtils.GetInputModifier(task);
}
public static int GetNumberOfThreads(InternalEncodingTask state, bool isWebm)
{
// Use more when this is true. -re will keep cpu usage under control
if (state.ReadInputAtNativeFramerate)
{
if (isWebm)
{
return Math.Max(Environment.ProcessorCount - 1, 2);
}
return 0;
}
// Webm: http://www.webmproject.org/docs/encoder-parameters/
// The decoder will usually automatically use an appropriate number of threads according to how many cores are available but it can only use multiple threads
// for the coefficient data if the encoder selected --token-parts > 0 at encode time.
switch (state.QualitySetting)
{
case EncodingQuality.HighSpeed:
return 2;
case EncodingQuality.HighQuality:
return isWebm ? Math.Max(Environment.ProcessorCount - 1, 2) : 0;
case EncodingQuality.MaxQuality:
return isWebm ? Math.Max(Environment.ProcessorCount - 1, 2) : 0;
default:
throw new Exception("Unrecognized MediaEncodingQuality value.");
}
}
public static string GetAudioInputModifier(InternalEncodingTask options)
{
return GetCommonInputModifier(options);
}
public Task BeginEncoding(InternalEncodingTask task)
{
return(new FFMpegProcess(_ffmpegPath, _logger, _fileSystem, _appPaths, _isoManager, _liveTvManager).Start(task, GetArguments));
}
private static string GetCommonInputModifier(InternalEncodingTask options)
{
var inputModifier = string.Empty;
if (options.EnableDebugLogging)
{
inputModifier += "-loglevel debug";
}
var probeSize = GetProbeSizeArgument(options.InputVideoType.HasValue && options.InputVideoType.Value == VideoType.Dvd);
inputModifier += " " + probeSize;
inputModifier = inputModifier.Trim();
if (!string.IsNullOrWhiteSpace(options.UserAgent))
{
inputModifier += " -user-agent \"" + options.UserAgent + "\"";
}
inputModifier += " " + GetFastSeekValue(options.Request);
inputModifier = inputModifier.Trim();
if (!string.IsNullOrEmpty(options.InputFormat))
{
inputModifier += " -f " + options.InputFormat;
}
if (!string.IsNullOrEmpty(options.InputAudioCodec))
{
inputModifier += " -acodec " + options.InputAudioCodec;
}
if (!string.IsNullOrEmpty(options.InputAudioSync))
{
inputModifier += " -async " + options.InputAudioSync;
}
if (options.ReadInputAtNativeFramerate)
{
inputModifier += " -re";
}
return inputModifier;
}
public async Task Start(InternalEncodingTask task, Func<InternalEncodingTask,string,string> argumentsFactory)
{
_task = task;
if (!File.Exists(_ffmpegPath))
{
throw new InvalidOperationException("ffmpeg was not found at " + _ffmpegPath);
}
Directory.CreateDirectory(Path.GetDirectoryName(task.Request.OutputPath));
string mountedPath = null;
if (task.InputVideoType.HasValue && task.InputVideoType == VideoType.Iso && task.IsoType.HasValue)
{
if (_isoManager.CanMount(task.MediaPath))
{
_isoMount = await _isoManager.Mount(task.MediaPath, CancellationToken.None).ConfigureAwait(false);
mountedPath = _isoMount.MountedPath;
}
}
var process = new Process
{
StartInfo = new ProcessStartInfo
{
CreateNoWindow = true,
UseShellExecute = false,
// Must consume both stdout and stderr or deadlocks may occur
RedirectStandardOutput = true,
RedirectStandardError = true,
FileName = _ffmpegPath,
WorkingDirectory = Path.GetDirectoryName(_ffmpegPath),
Arguments = argumentsFactory(task, mountedPath),
WindowStyle = ProcessWindowStyle.Hidden,
ErrorDialog = false
},
EnableRaisingEvents = true
};
_logger.Info(process.StartInfo.FileName + " " + process.StartInfo.Arguments);
var logFilePath = Path.Combine(_appPaths.LogDirectoryPath, "ffmpeg-" + task.Id + ".txt");
Directory.CreateDirectory(Path.GetDirectoryName(logFilePath));
// FFMpeg writes debug/error info to stderr. This is useful when debugging so let's put it in the log directory.
_logFileStream = _fileSystem.GetFileStream(logFilePath, FileMode.Create, FileAccess.Write, FileShare.Read, true);
process.Exited += process_Exited;
try
{
process.Start();
}
catch (Exception ex)
{
_logger.ErrorException("Error starting ffmpeg", ex);
task.OnError();
DisposeLogFileStream();
process.Dispose();
throw;
}
task.OnBegin();
// MUST read both stdout and stderr asynchronously or a deadlock may occurr
process.BeginOutputReadLine();
#pragma warning disable 4014
// Important - don't await the log task or we won't be able to kill ffmpeg when the user stops playback
process.StandardError.BaseStream.CopyToAsync(_logFileStream);
#pragma warning restore 4014
}
