public void StartChunking(
FFMPEGConfig ffmpegConfig,
StreamConfig streamConfig)
{
var procInfo = new ProcessStartInfo();
procInfo.FileName = ffmpegConfig.BinaryPath;
streamConfig.Name = streamConfig.Name;
var segmentFilename =
ffmpegConfig.ChunkStorageDir + "/" +
streamConfig.Name + "/" +
ffmpegConfig.SegmentFilename;
var m3u8File =
ffmpegConfig.ChunkStorageDir + "/" +
streamConfig.Name + "/" +
"index.m3u8";
procInfo.Arguments = string.Join(" ", new[]
{
"-y -re",
"-i " + streamConfig.Link,
"-map 0",
"-codec:v copy -codec:a copy",
"-f hls",
"-hls_time " + streamConfig.ChunkTime,
"-use_localtime 1 -use_localtime_mkdir 1",
"-hls_flags second_level_segment_duration+second_level_segment_index",
"-hls_segment_filename " + segmentFilename,
m3u8File
});
var proc = new Process();
proc.StartInfo = procInfo;
proc.Start();
processes.Add(proc);
}
public static string GeneratePlaylist(
string chanel,
DateTime time,
FFMPEGConfig ffmpegCfg,
IEnumerable <StreamConfig> streamsCfgs,
int hlsLstSize = 5)
{
var streamCfg = streamsCfgs.FirstOrDefault(x => x.Name == chanel);
if (streamCfg == null)
{
throw new Exception("No such chanel");
}
var chanelRoot = $"{ffmpegCfg.ChunkStorageDir}/{chanel}/";
var timer1 = new Stopwatch();
var timer2 = new Stopwatch();
timer2.Start();
var targetTime = GetMinChunkTimeSpan(
hlsLstSize, streamCfg.ChunkTime, time, chanelRoot);
timer2.Stop();
var targetTimeS = targetTime.Add(-DateTimeOffset.Now.Offset)
.ToUnixTimeSeconds();
timer1.Start();
var chunks =
Directory.GetFiles(chanelRoot, "*.ts", SearchOption.AllDirectories)
.Select(x => new ChunkFile(x))
.Where(x =>
x.timeSeconds >= targetTimeS - streamCfg.ChunkTime &&
x.millsDuration > 0)
.OrderBy(x => x.timeSeconds)
.Take(hlsLstSize);
var fileChunks = GetContinuousChunks(chunks).ToArray();
if (fileChunks.Length == 0)
{
throw new Exception("No available files");
}
timer1.Stop();
var content = String.Join("\n", new[]
{
"#EXTM3U",
"#EXT-X-VERSION:3",
$"#EXT-X-TARGETDURATION:{streamCfg.ChunkTime}",
$"#EXT-X-MEDIA-SEQUENCE:{fileChunks[0].index}",
$"#Stopwatch:{timer1.Elapsed.TotalMilliseconds}/{timer2.Elapsed.TotalMilliseconds}",
$"#RequestTime:{targetTimeS},"
});
content += "\n";
foreach (var file in fileChunks)
{
content += $"#EXTINF:{file.GetMillisecondsStr()}," + "\n";
content += file.fullPath.Replace(chanelRoot, "") + "\n";
}
return(content);
}
