1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
using MediaBrowser.Common.IO;
using MediaBrowser.Controller;
using MediaBrowser.Controller.Library;
using System;
namespace MediaBrowser.Api.Playback.Hls
{
public class VideoHlsService : BaseHlsService
{
public VideoHlsService(IServerApplicationPaths appPaths, IUserManager userManager, ILibraryManager libraryManager, IIsoManager isoManager)
: base(appPaths, userManager, libraryManager, isoManager)
{
}
/// <summary>
/// Gets the audio arguments.
/// </summary>
/// <param name="state">The state.</param>
/// <returns>System.String.</returns>
protected override string GetAudioArguments(StreamState state)
{
if (!state.Request.AudioCodec.HasValue)
{
return "-codec:a:0 copy";
}
var codec = GetAudioCodec(state.Request);
var args = "-codec:a:0 " + codec;
if (state.AudioStream != null)
{
var channels = GetNumAudioChannelsParam(state.Request, state.AudioStream);
if (channels.HasValue)
{
args += " -ac " + channels.Value;
}
if (state.Request.AudioSampleRate.HasValue)
{
args += " -ar " + state.Request.AudioSampleRate.Value;
}
if (state.Request.AudioBitRate.HasValue)
{
args += " -ab " + state.Request.AudioBitRate.Value;
}
return args;
}
return args;
}
/// <summary>
/// Gets the video arguments.
/// </summary>
/// <param name="state">The state.</param>
/// <returns>System.String.</returns>
protected override string GetVideoArguments(StreamState state)
{
var codec = GetVideoCodec(state.Request);
// Right now all we support is either h264 or copy
if (!codec.Equals("copy", StringComparison.OrdinalIgnoreCase) && !codec.Equals("libx264", StringComparison.OrdinalIgnoreCase))
{
codec = "libx264";
}
// See if we can save come cpu cycles by avoiding encoding
if (codec.Equals("copy", StringComparison.OrdinalIgnoreCase))
{
return IsH264(state.VideoStream) ? "-codec:v:0 copy -bsf h264_mp4toannexb" : "-codec:v:0 copy";
}
var args = "-codec:v:0 " + codec + " -preset superfast";
if (state.Request.VideoBitRate.HasValue)
{
args += string.Format(" -b:v {0}", state.Request.VideoBitRate.Value);
}
// Add resolution params, if specified
if (state.Request.Width.HasValue || state.Request.Height.HasValue || state.Request.MaxHeight.HasValue || state.Request.MaxWidth.HasValue)
{
args += GetOutputSizeParam(state, codec);
}
// Get the output framerate based on the FrameRate param
double framerate = state.Request.Framerate ?? 0;
// We have to supply a framerate for hls, so if it's null, account for that here
if (framerate.Equals(0))
{
framerate = state.VideoStream.AverageFrameRate ?? 0;
}
if (framerate.Equals(0))
{
framerate = state.VideoStream.RealFrameRate ?? 0;
}
if (framerate.Equals(0))
{
framerate = 23.976;
}
args += string.Format(" -r {0}", framerate);
// Needed to ensure segments stay under 10 seconds
args += string.Format(" -g {0}", framerate);
return args;
}
/// <summary>
/// Gets the segment file extension.
/// </summary>
/// <param name="state">The state.</param>
/// <returns>System.String.</returns>
protected override string GetSegmentFileExtension(StreamState state)
{
return ".ts";
}
}
}
|
