MediaStreamSource createHttpStream(Stream stream)
{
var flv = new FlvParse(stream);
var audiodesc = flv.Audios[0].CreateAudioDesc(flv.MediaData);
var videodesc = flv.Videos[0].CreateVideoDesc();
var c = new MediaStreamSource(audiodesc, videodesc);
c.Duration = TimeSpan.FromSeconds(flv.MediaData.Duration);
c.CanSeek = true;
return(c);
}
/// <summary>
/// IInputStream:不支持Seek
/// Stream 可以
/// IRandomAccessStream 可以
/// </summary>
/// <param name="stream"></param>
/// <returns></returns>
MediaStreamSource createMediaStream(Stream stream)
{
var flv = new FlvParse(stream);
var audiodesc = flv.Audios[0].CreateAudioDesc(flv.MediaData);
var videodesc = flv.Videos[0].CreateVideoDesc();
var c = new MediaStreamSource(audiodesc, videodesc);
c.Duration = TimeSpan.FromSeconds(flv.MediaData.Duration);
c.CanSeek = true;
Debug.WriteLine("-----------------------");
Debug.WriteLine("flv.tags.Count:" + flv.tags.Count);
var ai = 1;
var at = new TimeSpan(0);
var vi = 1;
var vt = new TimeSpan(0);
c.Starting += (s, e) => {
var req = e.Request;
Debug.WriteLine("==Starting==");
if ((req.StartPosition != null) && req.StartPosition.Value <= c.Duration)
{
vi = ai = 1;
var time = req.StartPosition.GetValueOrDefault();
foreach (var item in flv.Audios)
{
if (item.TimeSpan >= time)
{
Debug.WriteLine(time + " " + ai);
break;
}
ai++;
}
foreach (var item in flv.Videos)
{
if (item.TimeSpan >= time)
{
Debug.WriteLine(time + " " + ai);
break;
}
vi++;
}
Debug.WriteLine(time + " " + ai);
Debug.WriteLine(time + " " + vi);
}
};
c.SampleRequested += async(s, e) => {
var req = e.Request;
var deferal = req.GetDeferral();
if (req.StreamDescriptor is AudioStreamDescriptor)
{
if (flv.Audios.Count > ai)
{
var flvTag = flv.Audios[ai];
req.Sample = await flvTag.CreateAudioSample();
at = flvTag.TimeSpan;
ai++;
}
}
if (req.StreamDescriptor is VideoStreamDescriptor)
{
if (flv.Videos.Count > vi)
{
var flvTag = flv.Videos[vi]; //每一段进度条移动距离
req.Sample = await flvTag.CreateVideoSample(flv.Videos[0], true); // vi == 1);
vt = flvTag.TimeSpan;
vi++;
}
}
deferal.Complete();
};
return(c);
}
