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updated mpeg dash

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This commit is contained in:
Luke Pulverenti 2015-03-18 02:02:22 -04:00
parent 8c36adc6c3
commit 79d2f7efd7
4 changed files with 89 additions and 161 deletions
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2
MediaBrowser.Api/Playback/BaseStreamingService.cs
View File

@ -1095,7 +1095,7 @@ namespace MediaBrowser.Api.Playback
StartStreamingLog(transcodingJob, state, process.StandardError.BaseStream, state.LogFileStream);
// Wait for the file to exist before proceeeding
while (!File.Exists(outputPath) && !transcodingJob.HasExited)
while (!File.Exists(state.WaitForPath ?? outputPath) && !transcodingJob.HasExited)
{
await Task.Delay(100, cancellationTokenSource.Token).ConfigureAwait(false);
}

243
MediaBrowser.Api/Playback/Dash/MpegDashService.cs
View File

@ -55,7 +55,8 @@ namespace MediaBrowser.Api.Playback.Dash
public class MpegDashService : BaseHlsService
{
public MpegDashService(IServerConfigurationManager serverConfig, IUserManager userManager, ILibraryManager libraryManager, IIsoManager isoManager, IMediaEncoder mediaEncoder, IFileSystem fileSystem, ILiveTvManager liveTvManager, IDlnaManager dlnaManager, ISubtitleEncoder subtitleEncoder, IDeviceManager deviceManager, IProcessManager processManager, IMediaSourceManager mediaSourceManager, IZipClient zipClient, INetworkManager networkManager) : base(serverConfig, userManager, libraryManager, isoManager, mediaEncoder, fileSystem, liveTvManager, dlnaManager, subtitleEncoder, deviceManager, processManager, mediaSourceManager, zipClient)
public MpegDashService(IServerConfigurationManager serverConfig, IUserManager userManager, ILibraryManager libraryManager, IIsoManager isoManager, IMediaEncoder mediaEncoder, IFileSystem fileSystem, ILiveTvManager liveTvManager, IDlnaManager dlnaManager, ISubtitleEncoder subtitleEncoder, IDeviceManager deviceManager, IProcessManager processManager, IMediaSourceManager mediaSourceManager, IZipClient zipClient, INetworkManager networkManager)
: base(serverConfig, userManager, libraryManager, isoManager, mediaEncoder, fileSystem, liveTvManager, dlnaManager, subtitleEncoder, deviceManager, processManager, mediaSourceManager, zipClient)
{
NetworkManager = networkManager;
}
@ -118,7 +119,7 @@ namespace MediaBrowser.Api.Playback.Dash
var cancellationTokenSource = new CancellationTokenSource();
var cancellationToken = cancellationTokenSource.Token;
var index = string.Equals(segmentId, "init", StringComparison.OrdinalIgnoreCase) ?
var requestedIndex = string.Equals(segmentId, "init", StringComparison.OrdinalIgnoreCase) ?
-1 :
int.Parse(segmentId, NumberStyles.Integer, UsCulture);
@ -128,32 +129,35 @@ namespace MediaBrowser.Api.Playback.Dash
var segmentExtension = GetSegmentFileExtension(state);
var segmentPath = GetSegmentPath(playlistPath, representationId, segmentExtension, index);
var segmentPath = FindSegment(playlistPath, representationId, segmentExtension, requestedIndex);
var segmentLength = state.SegmentLength;
TranscodingJob job = null;
if (File.Exists(segmentPath))
if (!string.IsNullOrWhiteSpace(segmentPath))
{
job = ApiEntryPoint.Instance.GetTranscodingJob(playlistPath, TranscodingJobType);
return await GetSegmentResult(playlistPath, segmentPath, index, segmentLength, job, cancellationToken).ConfigureAwait(false);
return await GetSegmentResult(playlistPath, segmentPath, requestedIndex, segmentLength, job, cancellationToken).ConfigureAwait(false);
}
await ApiEntryPoint.Instance.TranscodingStartLock.WaitAsync(cancellationTokenSource.Token).ConfigureAwait(false);
try
{
if (File.Exists(segmentPath))
segmentPath = FindSegment(playlistPath, representationId, segmentExtension, requestedIndex);
if (!string.IsNullOrWhiteSpace(segmentPath))
{
job = ApiEntryPoint.Instance.GetTranscodingJob(playlistPath, TranscodingJobType);
return await GetSegmentResult(playlistPath, segmentPath, index, segmentLength, job, cancellationToken).ConfigureAwait(false);
return await GetSegmentResult(playlistPath, segmentPath, requestedIndex, segmentLength, job, cancellationToken).ConfigureAwait(false);
}
else
{
if (string.Equals(representationId, "0", StringComparison.OrdinalIgnoreCase))
{
job = ApiEntryPoint.Instance.GetTranscodingJob(playlistPath, TranscodingJobType);
var currentTranscodingIndex = GetCurrentTranscodingIndex(playlistPath, segmentExtension);
Logger.Debug("Current transcoding index is {0}", currentTranscodingIndex ?? -2);
if (currentTranscodingIndex == null || index < currentTranscodingIndex.Value || (index - currentTranscodingIndex.Value) > 4)
var segmentGapRequiringTranscodingChange = 24 / state.SegmentLength;
Logger.Debug("Current transcoding index is {0}. requestedIndex={1}. segmentGapRequiringTranscodingChange={2}", currentTranscodingIndex ?? -2, requestedIndex, segmentGapRequiringTranscodingChange);
if (currentTranscodingIndex == null || requestedIndex < currentTranscodingIndex.Value || (requestedIndex - currentTranscodingIndex.Value) > segmentGapRequiringTranscodingChange)
{
// If the playlist doesn't already exist, startup ffmpeg
try
@ -162,22 +166,25 @@ namespace MediaBrowser.Api.Playback.Dash
if (currentTranscodingIndex.HasValue)
{
DeleteTranscodedFiles(playlistPath, 0);
DeleteLastTranscodedFiles(playlistPath, 0);
}
var positionTicks = GetPositionTicks(state, index);
var positionTicks = GetPositionTicks(state, requestedIndex);
request.StartTimeTicks = positionTicks;
job = await StartFfMpeg(state, playlistPath, cancellationTokenSource, Path.GetDirectoryName(playlistPath)).ConfigureAwait(false);
Task.Run(() => MonitorDashProcess(playlistPath, positionTicks == 0, job, cancellationToken));
var startNumber = GetStartNumber(state);
var workingDirectory = Path.Combine(Path.GetDirectoryName(playlistPath), (startNumber == -1 ? 0 : startNumber).ToString(CultureInfo.InvariantCulture));
state.WaitForPath = Path.Combine(workingDirectory, Path.GetFileName(playlistPath));
Directory.CreateDirectory(workingDirectory);
job = await StartFfMpeg(state, playlistPath, cancellationTokenSource, workingDirectory).ConfigureAwait(false);
await WaitForMinimumDashSegmentCount(Path.Combine(workingDirectory, Path.GetFileName(playlistPath)), 1, cancellationTokenSource.Token).ConfigureAwait(false);
}
catch
{
state.Dispose();
throw;
}
await WaitForMinimumSegmentCount(playlistPath, 1, cancellationTokenSource.Token).ConfigureAwait(false);
}
}
}
@ -187,15 +194,14 @@ namespace MediaBrowser.Api.Playback.Dash
ApiEntryPoint.Instance.TranscodingStartLock.Release();
}
Logger.Info("waiting for {0}", segmentPath);
while (!File.Exists(segmentPath))
while (string.IsNullOrWhiteSpace(segmentPath))
{
segmentPath = FindSegment(playlistPath, representationId, segmentExtension, requestedIndex);
await Task.Delay(50, cancellationToken).ConfigureAwait(false);
}
Logger.Info("returning {0}", segmentPath);
return await GetSegmentResult(playlistPath, segmentPath, index, segmentLength, job ?? ApiEntryPoint.Instance.GetTranscodingJob(playlistPath, TranscodingJobType), cancellationToken).ConfigureAwait(false);
return await GetSegmentResult(playlistPath, segmentPath, requestedIndex, segmentLength, job ?? ApiEntryPoint.Instance.GetTranscodingJob(playlistPath, TranscodingJobType), cancellationToken).ConfigureAwait(false);
}
private void KillTranscodingJobs(string deviceId, string playlistPath)
@ -214,41 +220,9 @@ namespace MediaBrowser.Api.Playback.Dash
return TimeSpan.FromSeconds(startSeconds).Ticks;
}
protected override async Task WaitForMinimumSegmentCount(string playlist, int segmentCount, CancellationToken cancellationToken)
protected Task WaitForMinimumDashSegmentCount(string playlist, int segmentCount, CancellationToken cancellationToken)
{
var tmpPath = playlist + ".tmp";
Logger.Debug("Waiting for {0} segments in {1}", segmentCount, playlist);
while (true)
{
FileStream fileStream;
try
{
fileStream = FileSystem.GetFileStream(tmpPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite, true);
}
catch (IOException)
{
fileStream = FileSystem.GetFileStream(playlist, FileMode.Open, FileAccess.Read, FileShare.ReadWrite, true);
}
// Need to use FileShare.ReadWrite because we're reading the file at the same time it's being written
using (fileStream)
{
using (var reader = new StreamReader(fileStream))
{
while (!reader.EndOfStream)
{
var line = await reader.ReadLineAsync().ConfigureAwait(false);
if (line.IndexOf("stream0-" + segmentCount.ToString("00000", CultureInfo.InvariantCulture) + ".m4s", StringComparison.OrdinalIgnoreCase) != -1)
{
Logger.Debug("Finished waiting for {0} segments in {1}", segmentCount, playlist);
return;
}
}
await Task.Delay(100, cancellationToken).ConfigureAwait(false);
}
}
}
return WaitForSegment(playlist, "stream0-" + segmentCount.ToString("00000", CultureInfo.InvariantCulture) + ".m4s", cancellationToken);
}
private async Task<object> GetSegmentResult(string playlistPath,
@ -291,7 +265,7 @@ namespace MediaBrowser.Api.Playback.Dash
length = newLength;
await Task.Delay(100, cancellationToken).ConfigureAwait(false);
}
return GetSegmentResult(segmentPath, segmentIndex, segmentLength, transcodingJob);
}
@ -324,23 +298,24 @@ namespace MediaBrowser.Api.Playback.Dash
return null;
}
return GetIndex(file.Name);
return GetIndex(file.FullName);
}
public int GetIndex(string segmentFile)
public int GetIndex(string segmentPath)
{
var indexString = Path.GetFileNameWithoutExtension(segmentFile).Split('-').LastOrDefault();
var indexString = Path.GetFileNameWithoutExtension(segmentPath).Split('-').LastOrDefault();
if (string.Equals(indexString, "init", StringComparison.OrdinalIgnoreCase))
{
return -1;
}
return int.Parse(indexString, NumberStyles.Integer, UsCulture) - 1;
var startNumber = int.Parse(Path.GetFileNameWithoutExtension(Path.GetDirectoryName(segmentPath)), NumberStyles.Integer, UsCulture);
return startNumber + int.Parse(indexString, NumberStyles.Integer, UsCulture) - 1;
}
private void DeleteTranscodedFiles(string path, int retryCount)
private void DeleteLastTranscodedFiles(string playlistPath, int retryCount)
{
if (retryCount >= 5)
{
return;
@ -354,7 +329,7 @@ namespace MediaBrowser.Api.Playback.Dash
try
{
return new DirectoryInfo(folder)
.EnumerateFiles("*", SearchOption.TopDirectoryOnly)
.EnumerateFiles("*", SearchOption.AllDirectories)
.Where(i => string.Equals(i.Extension, segmentExtension, StringComparison.OrdinalIgnoreCase))
.OrderByDescending(fileSystem.GetLastWriteTimeUtc)
.Take(count)
@ -366,17 +341,35 @@ namespace MediaBrowser.Api.Playback.Dash
}
}
private string GetSegmentPath(string playlist, string representationId, string segmentExtension, int index)
private string FindSegment(string playlist, string representationId, string segmentExtension, int index)
{
var folder = Path.GetDirectoryName(playlist);
var number = index == -1 ?
"init" :
index.ToString("00000", CultureInfo.InvariantCulture);
if (index == -1)
{
var path = Path.Combine(folder, "0", "stream" + representationId + "-" + "init" + segmentExtension);
return File.Exists(path) ? path : null;
}
var filename = "stream" + representationId + "-" + number + segmentExtension;
try
{
foreach (var subfolder in new DirectoryInfo(folder).EnumerateDirectories().ToList())
{
int startNumber;
if (int.TryParse(Path.GetFileNameWithoutExtension(subfolder.FullName), NumberStyles.Any, UsCulture, out startNumber))
{
var segmentIndex = index - startNumber + 1;
var path = Path.Combine(folder, "0", "stream" + representationId + "-" + segmentIndex.ToString("00000", CultureInfo.InvariantCulture) + segmentExtension);
return File.Exists(path) ? path : null;
}
}
}
catch (DirectoryNotFoundException)
{
}
return Path.Combine(folder, "completed", filename);
return null;
}
protected override string GetAudioArguments(StreamState state)
@ -458,7 +451,6 @@ namespace MediaBrowser.Api.Playback.Dash
var threads = GetNumberOfThreads(state, false);
var inputModifier = GetInputModifier(state);
//var startNumber = GetStartNumber(state);
var initSegmentName = "stream$RepresentationID$-init.m4s";
var segmentName = "stream$RepresentationID$-$Number%05d$.m4s";
@ -473,7 +465,7 @@ namespace MediaBrowser.Api.Playback.Dash
initSegmentName,
segmentName,
(state.SegmentLength * 1000000).ToString(CultureInfo.InvariantCulture),
outputPath
state.WaitForPath
).Trim();
return args;
@ -520,109 +512,44 @@ namespace MediaBrowser.Api.Playback.Dash
}
}
private async void MonitorDashProcess(string playlist, bool moveInitSegment, TranscodingJob transcodingJob, CancellationToken cancellationToken)
private async Task WaitForSegment(string playlist, string segment, CancellationToken cancellationToken)
{
var directory = new DirectoryInfo(Path.GetDirectoryName(playlist));
var completedDirectory = Path.Combine(Path.GetDirectoryName(playlist), "completed");
Directory.CreateDirectory(completedDirectory);
var tmpPath = playlist + ".tmp";
while (!cancellationToken.IsCancellationRequested)
var segmentFilename = Path.GetFileName(segment);
Logger.Debug("Waiting for {0} in {1}", segmentFilename, playlist);
while (true)
{
FileStream fileStream;
try
{
var files = directory.EnumerateFiles("*.m4s", SearchOption.TopDirectoryOnly)
.OrderBy(FileSystem.GetCreationTimeUtc)
.ToList();
foreach (var file in files)
{
var fileIndex = GetIndex(file.Name);
if (fileIndex == -1 && !moveInitSegment)
{
continue;
}
await WaitForFileToBeComplete(file.FullName, playlist, transcodingJob, cancellationToken).ConfigureAwait(false);
var newName = fileIndex == -1
? "init.m4s"
: fileIndex.ToString("00000", CultureInfo.InvariantCulture) + ".m4s";
var representationId = file.FullName.IndexOf("stream0", StringComparison.OrdinalIgnoreCase) != -1 ?
"0" :
"1";
newName = "stream" + representationId + "-" + newName;
File.Copy(file.FullName, Path.Combine(completedDirectory, newName), true);
cancellationToken.ThrowIfCancellationRequested();
}
await Task.Delay(250, cancellationToken).ConfigureAwait(false);
}
catch (OperationCanceledException)
{
break;
fileStream = FileSystem.GetFileStream(tmpPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite, true);
}
catch (IOException)
{
fileStream = FileSystem.GetFileStream(playlist, FileMode.Open, FileAccess.Read, FileShare.ReadWrite, true);
}
}
}
private async Task WaitForFileToBeComplete(string segmentPath, string playlistPath, TranscodingJob transcodingJob, CancellationToken cancellationToken)
{
// If all transcoding has completed, just return immediately
if (transcodingJob != null && transcodingJob.HasExited)
{
return;
}
var segmentFilename = Path.GetFileName(segmentPath);
using (var fileStream = FileSystem.GetFileStream(playlistPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite, true))
{
using (var reader = new StreamReader(fileStream))
// Need to use FileShare.ReadWrite because we're reading the file at the same time it's being written
using (fileStream)
{
var text = await reader.ReadToEndAsync().ConfigureAwait(false);
// If it appears in the playlist, it's done
if (text.IndexOf(segmentFilename, StringComparison.OrdinalIgnoreCase) != -1)
using (var reader = new StreamReader(fileStream))
{
return;
while (!reader.EndOfStream)
{
var line = await reader.ReadLineAsync().ConfigureAwait(false);
if (line.IndexOf(segmentFilename, StringComparison.OrdinalIgnoreCase) != -1)
{
Logger.Debug("Finished waiting for {0} in {1}", segmentFilename, playlist);
return;
}
}
await Task.Delay(100, cancellationToken).ConfigureAwait(false);
}
}
}
// Wait for the file to stop being written to, then stream it
var length = new FileInfo(segmentPath).Length;
var eofCount = 0;
while (eofCount < 10)
{
var info = new FileInfo(segmentPath);
if (!info.Exists)
{
break;
}
var newLength = info.Length;
if (newLength == length)
{
eofCount++;
}
else
{
eofCount = 0;
}
length = newLength;
await Task.Delay(100, cancellationToken).ConfigureAwait(false);
}
}
}
}

4
MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs
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@ -130,8 +130,8 @@ namespace MediaBrowser.Api.Playback.Hls
else
{
var currentTranscodingIndex = GetCurrentTranscodingIndex(playlistPath, segmentExtension);
if (currentTranscodingIndex == null || index < currentTranscodingIndex.Value || (index - currentTranscodingIndex.Value) > 4)
var segmentGapRequiringTranscodingChange = 24/state.SegmentLength;
if (currentTranscodingIndex == null || index < currentTranscodingIndex.Value || (index - currentTranscodingIndex.Value) > segmentGapRequiringTranscodingChange)
{
// If the playlist doesn't already exist, startup ffmpeg
try

1
MediaBrowser.Api/Playback/StreamState.cs
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@ -52,6 +52,7 @@ namespace MediaBrowser.Api.Playback
public IIsoMount IsoMount { get; set; }
public string MediaPath { get; set; }
public string WaitForPath { get; set; }
public MediaProtocol InputProtocol { get; set; }