private static async Task <bool> SendSegmentAsync(string fileName, IOwinContext context, StreamItem streamItem)
{
if (!string.IsNullOrEmpty(fileName) && streamItem.StreamContext is TranscodeContext tc)
{
using (await streamItem.RequestBusyLockAsync(SendDataCancellation.Token))
{
var segment = await MediaConverter.GetSegmentFileAsync((VideoTranscoding)streamItem.TranscoderObject.TranscodingParameter, tc, fileName);
if (segment != null)
{
if (segment.Value.ContainerEnum is VideoContainer)
{
VideoTranscoding video = (VideoTranscoding)streamItem.TranscoderObject.TranscodingParameter;
List <string> profiles = ProfileMime.ResolveVideoProfile((VideoContainer)segment.Value.ContainerEnum, video.TargetVideoCodec, video.TargetAudioCodec, EncodingProfile.Unknown, 0, 0, 0, 0, 0, 0, Timestamp.None);
string mime = "video/unknown";
ProfileMime.FindCompatibleMime(streamItem.Profile, profiles, ref mime);
context.Response.ContentType = mime;
}
else if (segment.Value.ContainerEnum is SubtitleCodec)
{
context.Response.ContentType = SubtitleHelper.GetSubtitleMime((SubtitleCodec)segment.Value.ContainerEnum);
}
bool onlyHeaders = context.Request.Method == "HEAD" || context.Response.StatusCode == (int)HttpStatusCode.NotModified;
Logger.Debug("RetrieveStream: Sending file header only: {0}", onlyHeaders.ToString());
await SendWholeFileAsync(context, segment.Value.FileData, onlyHeaders);
// Close the Stream so that FFMpeg can replace the playlist file
segment.Value.FileData.Dispose();
return(true);
}
}
}
return(false);
}
public static bool UseSoftCodedSubtitle(EndPointSettings client, out SubtitleCodec targetCodec, out string targetMime)
{
targetCodec = SubtitleCodec.Unknown;
targetMime = "text/plain";
if (client.Profile.MediaTranscoding.SubtitleSettings.SubtitleMode == SubtitleSupport.SoftCoded)
{
targetCodec = client.Profile.MediaTranscoding.SubtitleSettings.SubtitlesSupported[0].Format;
if (string.IsNullOrEmpty(client.Profile.MediaTranscoding.SubtitleSettings.SubtitlesSupported[0].Mime) == false)
{
targetMime = client.Profile.MediaTranscoding.SubtitleSettings.SubtitlesSupported[0].Mime;
}
else
{
targetMime = SubtitleHelper.GetSubtitleMime(targetCodec);
}
return(true);
}
return(false);
}
protected override async Task <TranscodeContext> TranscodeVideoAsync(string clientId, VideoTranscoding video, double timeStart, double timeDuration, bool waitForBuffer)
{
FFMpegTranscodeContext context = new FFMpegTranscodeContext(_cacheEnabled, _cachePath);
context.TargetDuration = video.SourceMediaDuration;
if (timeStart == 0 && video.TargetIsLive == false && _cacheEnabled)
{
timeDuration = 0;
context.Partial = false;
}
else if (video.TargetVideoContainer == VideoContainer.Hls)
{
context.Partial = true;
}
else
{
video.TargetIsLive = true;
context.Partial = true;
}
if (video.TargetVideoContainer == VideoContainer.Unknown)
{
video.TargetVideoContainer = video.SourceVideoContainer;
}
bool embeddedSupported = false;
SubtitleCodec embeddedSubCodec = SubtitleCodec.Unknown;
if (video.TargetSubtitleSupport == SubtitleSupport.Embedded)
{
if (video.TargetVideoContainer == VideoContainer.Matroska)
{
embeddedSupported = true;
embeddedSubCodec = SubtitleCodec.Ass;
video.TargetSubtitleCodec = SubtitleCodec.Ass;
}
else if (video.TargetVideoContainer == VideoContainer.Mp4)
{
embeddedSupported = true;
embeddedSubCodec = SubtitleCodec.MovTxt;
video.TargetSubtitleCodec = SubtitleCodec.MovTxt;
}
else if (video.TargetVideoContainer == VideoContainer.Hls)
{
embeddedSupported = true;
embeddedSubCodec = SubtitleCodec.WebVtt;
video.TargetSubtitleCodec = SubtitleCodec.WebVtt;
}
else if (video.TargetVideoContainer == VideoContainer.Avi)
{
embeddedSupported = true;
embeddedSubCodec = SubtitleCodec.Srt;
video.TargetSubtitleCodec = SubtitleCodec.Srt;
}
//else if (video.TargetVideoContainer == VideoContainer.Mpeg2Ts)
//{
// embeddedSupported = true;
// embeddedSubCodec = SubtitleCodec.DvbSub;
// video.TargetSubtitleCodec = SubtitleCodec.VobSub;
//}
else
{
_logger.Debug("FFMpegMediaConverter: Container {0} does not support embedded subtitles", video.TargetVideoContainer);
}
}
video.TargetSubtitleMime = SubtitleHelper.GetSubtitleMime(video.TargetSubtitleCodec);
video.PreferredSourceSubtitles = await GetSubtitlesAsync(clientId, video, timeStart).ConfigureAwait(false);
string transcodingFile = GetTranscodingVideoFileName(video, timeStart, embeddedSupported);
transcodingFile = Path.Combine(_cachePath, transcodingFile);
if (File.Exists(transcodingFile))
{
//Use non-partial transcode if possible
TranscodeContext existingContext = await GetExistingTranscodeContextAsync(clientId, video.TranscodeId).ConfigureAwait(false);
if (existingContext != null)
{
existingContext.TargetFile = transcodingFile;
if (existingContext.Stream == null)
{
existingContext.AssignStream(await GetFileStreamAsync(transcodingFile).ConfigureAwait(false));
}
if (existingContext.CurrentDuration.TotalSeconds == 0)
{
double bitrate = 0;
if (video.TargetVideoBitrate.HasValue && video.TargetAudioBitrate.HasValue)
{
bitrate = video.TargetVideoBitrate.Value + video.TargetAudioBitrate.Value;
}
else if (video.SourceVideoStream.Bitrate.HasValue && video.SourceAudioStreams.Any(a => a.Bitrate > 0))
{
bitrate = video.SourceVideoStream.Bitrate.Value + video.SourceAudioStreams.Max(a => a.Bitrate ?? 0);
}
bitrate *= 1024; //Bitrate in bits/s
if (bitrate > 0)
{
long startByte = Convert.ToInt64((bitrate * timeStart) / 8.0);
if (existingContext.Stream.Length > startByte)
{
return(existingContext);
}
}
}
else
{
if (existingContext.CurrentDuration.TotalSeconds > timeStart)
{
return(existingContext);
}
}
}
else
{
//Presume that it is a cached file
TouchFile(transcodingFile);
context.Partial = false;
context.TargetFile = transcodingFile;
context.AssignStream(await GetFileStreamAsync(transcodingFile).ConfigureAwait(false));
return(context);
}
}
if (video.TargetVideoContainer == VideoContainer.Hls)
{
long requestedSegmentSequence = requestedSegmentSequence = Convert.ToInt64(timeStart / HLSSegmentTimeInSeconds);
if (requestedSegmentSequence > 0)
{
requestedSegmentSequence--; //1 segment file margin
}
string pathName = FFMpegPlaylistManifest.GetPlaylistFolderFromTranscodeFile(_cachePath, transcodingFile);
string playlist = Path.Combine(pathName, PlaylistManifest.PLAYLIST_MANIFEST_FILE_NAME);
string segmentFile = Path.Combine(pathName, requestedSegmentSequence.ToString("00000") + ".ts");
if (File.Exists(playlist) == true && File.Exists(segmentFile) == true)
{
//Use exisitng context if possible
TranscodeContext existingContext = await GetExistingTranscodeContextAsync(clientId, video.TranscodeId).ConfigureAwait(false);
if (existingContext != null)
{
if (existingContext.LastSegment > requestedSegmentSequence)
{
existingContext.TargetFile = playlist;
existingContext.SegmentDir = pathName;
if (existingContext.Stream == null)
{
existingContext.AssignStream(await GetFileStreamAsync(playlist).ConfigureAwait(false));
}
existingContext.HlsBaseUrl = video.HlsBaseUrl;
return(existingContext);
}
}
else
{
//Presume that it is a cached file
TouchDirectory(pathName);
context.Partial = false;
context.TargetFile = playlist;
context.SegmentDir = pathName;
context.HlsBaseUrl = video.HlsBaseUrl;
context.AssignStream(await GetFileStreamAsync(playlist).ConfigureAwait(false));
return(context);
}
}
}
FFMpegTranscodeData data = new FFMpegTranscodeData(_cachePath)
{
TranscodeId = video.TranscodeId, ClientId = clientId
};
if (string.IsNullOrEmpty(video.TranscoderBinPath) == false)
{
data.TranscoderBinPath = video.TranscoderBinPath;
}
if (string.IsNullOrEmpty(video.TranscoderArguments) == false)
{
data.ConcatedFileInput = video.ConcatSourceMediaPaths;
data.TranscoderArguments = video.TranscoderArguments;
data.InputMediaFilePaths = video.SourceMediaPaths;
if (video.PreferredSourceSubtitles != null)
{
foreach (var mediaSourceIndex in video.PreferredSourceSubtitles.Keys)
{
foreach (var sub in video.PreferredSourceSubtitles[mediaSourceIndex])
{
if (string.IsNullOrEmpty(sub.SourcePath) == false)
{
data.AddSubtitle(mediaSourceIndex, sub.SourcePath);
context.TargetSubtitles.Add(sub.SourcePath);
}
}
}
}
data.OutputFilePath = transcodingFile;
context.TargetFile = transcodingFile;
}
else
{
data.Encoder = _ffMpegEncoderHandler.StartEncoding(video.TranscodeId, video.TargetVideoCodec);
_ffMpegCommandline.InitTranscodingParameters(video.ConcatSourceMediaPaths, video.SourceMediaPaths, ref data);
bool useX26XLib = video.TargetVideoCodec == VideoCodec.H264 || video.TargetVideoCodec == VideoCodec.H265;
_ffMpegCommandline.AddTranscodingThreadsParameters(!useX26XLib, ref data);
int subCopyStream = -1;
if (video.PreferredSourceSubtitles.Any())
{
if (video.FirstPreferredSourceSubtitle.IsEmbedded)
{
subCopyStream = video.FirstPreferredSourceSubtitle.StreamIndex;
_ffMpegCommandline.AddSubtitleCopyParameters(video.FirstPreferredSourceSubtitle, data);
}
else if (embeddedSupported)
{
foreach (int mediaSourceIndex in video.PreferredSourceSubtitles.Keys)
{
_ffMpegCommandline.AddSubtitleEmbeddingParameters(mediaSourceIndex, video.PreferredSourceSubtitles[mediaSourceIndex], embeddedSubCodec, timeStart, data);
}
}
else if (video.TargetSubtitleSupport != SubtitleSupport.SoftCoded)
{
video.TargetSubtitleSupport = SubtitleSupport.HardCoded; //Fallback to hardcoded subtitles
_logger.Debug("FFMpegMediaConverter: Soft subs not supported. Fallback to hardcoded subtitles");
}
}
else
{
embeddedSupported = false;
data.OutputArguments.Add("-sn");
}
_ffMpegCommandline.AddTimeParameters(video, timeStart, timeDuration, data);
_ffMpegCommandline.AddStreamMapParameters(video, data);
FFMpegEncoderConfig encoderConfig = _ffMpegEncoderHandler.GetEncoderConfig(data.Encoder);
_ffMpegCommandline.AddVideoParameters(video, data.TranscodeId, encoderConfig, data);
_ffMpegCommandline.AddVideoAudioParameters(video, data);
var result = await _ffMpegCommandline.AddTargetVideoFormatAndOutputFileParametersAsync(video, transcodingFile, timeStart, data).ConfigureAwait(false);
context.TargetFile = result.TranscodingFile;
context.CurrentSegment = result.StartSegment;
if (video.PreferredSourceSubtitles.Any())
{
foreach (var sub in video.PreferredSourceSubtitles.SelectMany(s => s.Value))
{
if (string.IsNullOrEmpty(sub.SourcePath) == false)
{
context.TargetSubtitles.Add(sub.SourcePath);
}
}
}
}
_logger.Info("FFMpegMediaConverter: Invoking transcoder to transcode video file '{0}' for transcode '{1}' with arguments '{2}'", video.SourceMediaPaths.First().Value, video.TranscodeId, String.Join(", ", data.OutputArguments.ToArray()));
context.Start();
context.AssignStream(await ExecuteTranscodingProcessAsync(data, context, waitForBuffer).ConfigureAwait(false));
return(context);
}