private void FfmpegListener()
{
_reasonToStop = ReasonToFinishPlaying.StoppedByUser;
_vfr = null;
bool open = false;
string errmsg = "";
_eventing = null;
_stopping = false;
try
{
Program.FfmpegMutex.WaitOne();
_vfr = new VideoFileReader();
//ensure http/https is lower case for string compare in ffmpeg library
int i = _source.IndexOf("://", StringComparison.Ordinal);
if (i > -1)
{
_source = _source.Substring(0, i).ToLower() + _source.Substring(i);
}
_vfr.Timeout = Timeout;
_vfr.AnalyzeDuration = AnalyzeDuration;
_vfr.Cookies = Cookies;
_vfr.UserAgent = UserAgent;
_vfr.Headers = Headers;
_vfr.Flags = -1;
_vfr.NoBuffer = true;
_vfr.RTSPMode = RTSPMode;
_vfr.Open(_source);
open = true;
}
catch (Exception ex)
{
Logger.LogExceptionToFile(ex, "FFMPEG");
}
finally
{
try
{
Program.FfmpegMutex.ReleaseMutex();
}
catch (ObjectDisposedException)
{
//can happen on shutdown
}
}
if (_vfr == null || !_vfr.IsOpen || !open)
{
ShutDown("Could not open stream" + ": " + _source);
return;
}
bool hasaudio = false;
if (_vfr.Channels > 0)
{
hasaudio = true;
RecordingFormat = new WaveFormat(_vfr.SampleRate, 16, _vfr.Channels);
_waveProvider = new BufferedWaveProvider(RecordingFormat) { DiscardOnBufferOverflow = true, BufferDuration = TimeSpan.FromMilliseconds(500) };
SampleChannel = new SampleChannel(_waveProvider);
SampleChannel.PreVolumeMeter += SampleChannelPreVolumeMeter;
}
Duration = _vfr.Duration;
_videoQueue = new ConcurrentQueue<Bitmap>();
_audioQueue = new ConcurrentQueue<byte[]>();
_eventing = new Thread(EventManager) { Name = "ffmpeg eventing", IsBackground = true };
_eventing.Start();
try
{
while (!_stopEvent.WaitOne(5) && !MainForm.ShuttingDown)
{
var nf = NewFrame;
if (nf == null)
break;
object frame = _vfr.ReadFrame();
switch (_vfr.LastFrameType)
{
case 0:
//null packet
if ((DateTime.UtcNow - LastFrame).TotalMilliseconds > Timeout)
throw new TimeoutException("Timeout reading from video stream");
break;
case 1:
LastFrame = DateTime.UtcNow;
if (hasaudio)
{
var data = frame as byte[];
if (data?.Length > 0)
{
ProcessAudio(data);
}
}
break;
case 2:
LastFrame = DateTime.UtcNow;
var bmp = frame as Bitmap;
if (bmp != null)
{
if (_videoQueue.Count<20)
_videoQueue.Enqueue(bmp);
}
break;
}
}
}
catch (Exception e)
{
Logger.LogExceptionToFile(e, "FFMPEG");
errmsg = e.Message;
}
_stopEvent.Set();
_eventing.Join();
if (SampleChannel != null)
{
SampleChannel.PreVolumeMeter -= SampleChannelPreVolumeMeter;
SampleChannel = null;
}
if (_waveProvider?.BufferedBytes > 0)
_waveProvider?.ClearBuffer();
ShutDown(errmsg);
}
private void FfmpegListener()
{
_reasonToStop = ReasonToFinishPlaying.StoppedByUser;
_vfr = null;
bool open = false;
string errmsg = "";
_eventing = null;
_stopping = false;
try
{
Program.FfmpegMutex.WaitOne();
_vfr = new VideoFileReader();
//ensure http/https is lower case for string compare in ffmpeg library
int i = _source.IndexOf("://", StringComparison.Ordinal);
if (i > -1)
{
_source = _source.Substring(0, i).ToLower() + _source.Substring(i);
}
_vfr.Timeout = Timeout;
_vfr.AnalyzeDuration = AnalyzeDuration;
_vfr.Cookies = Cookies;
_vfr.UserAgent = UserAgent;
_vfr.Headers = Headers;
_vfr.Flags = -1;
_vfr.NoBuffer = true;
_vfr.RTSPMode = RTSPMode;
_vfr.Open(_source);
open = true;
}
catch (Exception ex)
{
Logger.LogExceptionToFile(ex, "FFMPEG");
}
finally
{
try
{
Program.FfmpegMutex.ReleaseMutex();
}
catch (ObjectDisposedException)
{
//can happen on shutdown
}
}
if (_vfr == null || !_vfr.IsOpen || !open)
{
ShutDown("Could not open stream" + ": " + _source);
return;
}
bool hasaudio = false;
if (_vfr.Channels > 0)
{
hasaudio = true;
RecordingFormat = new WaveFormat(_vfr.SampleRate, 16, _vfr.Channels);
_waveProvider = new BufferedWaveProvider(RecordingFormat)
{
DiscardOnBufferOverflow = true, BufferDuration = TimeSpan.FromMilliseconds(500)
};
SampleChannel = new SampleChannel(_waveProvider);
SampleChannel.PreVolumeMeter += SampleChannelPreVolumeMeter;
}
Duration = _vfr.Duration;
_videoQueue = new ConcurrentQueue <Bitmap>();
_audioQueue = new ConcurrentQueue <byte[]>();
_eventing = new Thread(EventManager)
{
Name = "ffmpeg eventing", IsBackground = true
};
_eventing.Start();
try
{
while (!_stopEvent.WaitOne(5) && !MainForm.ShuttingDown)
{
var nf = NewFrame;
if (nf == null)
{
break;
}
object frame = _vfr.ReadFrame();
switch (_vfr.LastFrameType)
{
case 0:
//null packet
if ((DateTime.UtcNow - LastFrame).TotalMilliseconds > Timeout)
{
throw new TimeoutException("Timeout reading from video stream");
}
break;
case 1:
LastFrame = DateTime.UtcNow;
if (hasaudio)
{
var data = frame as byte[];
if (data?.Length > 0)
{
ProcessAudio(data);
}
}
break;
case 2:
LastFrame = DateTime.UtcNow;
var bmp = frame as Bitmap;
if (bmp != null)
{
if (_videoQueue.Count < 20)
{
_videoQueue.Enqueue(bmp);
}
}
break;
}
}
}
catch (Exception e)
{
Logger.LogExceptionToFile(e, "FFMPEG");
errmsg = e.Message;
}
_stopEvent.Set();
_eventing.Join();
if (SampleChannel != null)
{
SampleChannel.PreVolumeMeter -= SampleChannelPreVolumeMeter;
SampleChannel = null;
}
if (_waveProvider?.BufferedBytes > 0)
{
_waveProvider?.ClearBuffer();
}
ShutDown(errmsg);
}
private void btnTest_Click(object sender, EventArgs e)
{
btnTest.Enabled = false;
string res = "OK";
try
{
Program.FfmpegMutex.WaitOne();
string source = cmbFile.Text;
using (var vfr = new VideoFileReader())
{
int i = source.IndexOf("://", StringComparison.Ordinal);
if (i > -1)
{
source = source.Substring(0, i).ToLower() + source.Substring(i);
}
vfr.Timeout = CameraControl.Camobject.settings.timeout;
vfr.AnalyzeDuration = (int) numAnalyseDuration.Value;
vfr.Cookies = CameraControl.Camobject.settings.cookies;
vfr.UserAgent = CameraControl.Camobject.settings.useragent;
vfr.Headers = CameraControl.Camobject.settings.headers;
vfr.RTSPMode = ddlRTSP.SelectedIndex;
vfr.Flags = -1;
vfr.NoBuffer = true;
vfr.Open(source);
var f = vfr.ReadFrame();
if (f == null)
throw new Exception("Could not read from url");
}
}
catch (Exception ex)
{
res = ex.Message;
}
finally
{
try
{
Program.FfmpegMutex.ReleaseMutex();
}
catch (ObjectDisposedException)
{
//can happen on shutdown
}
}
MessageBox.Show(res);
btnTest.Enabled = true;
}
private bool DecodeFrame(int analyseInterval, bool hasaudio, ref double firstmaxdrift, ref double maxdrift,
ref DateTime dtAnalyse)
{
object frame = _vfr.ReadFrame();
if (_stopEvent.WaitOne(0))
{
return(false);
}
switch (_vfr.LastFrameType)
{
case 0:
//null packet
if (!_realtime)
{
//end of file
//wait for all frames to be emitted
while (!_stopEvent.WaitOne(2))
{
if (_videoframes.Count == 0 && _audioframes.Count == 0)
{
break;
}
}
return(true);
}
if ((Helper.Now - LastFrame).TotalMilliseconds > Timeout)
{
throw new TimeoutException("Timeout reading from video stream");
}
break;
case 1:
LastFrame = Helper.Now;
if (hasaudio)
{
var data = frame as byte[];
if (data != null)
{
if (data.Length > 0)
{
double t = _vfr.AudioTime;
_audioframes.Add(new DelayedAudio(data, t, _delay));
}
}
}
break;
case 2:
LastFrame = Helper.Now;
if (frame != null)
{
var bmp = frame as Bitmap;
if (dtAnalyse == DateTime.MinValue)
{
dtAnalyse = Helper.Now.AddSeconds(analyseInterval);
}
double t = _vfr.VideoTime;
if (_realtime)
{
double drift = _vfr.VideoTime - _sw.ElapsedMilliseconds;
if (dtAnalyse > Helper.Now)
{
if (Math.Abs(drift) > Math.Abs(maxdrift))
{
maxdrift = drift;
}
}
else
{
if (firstmaxdrift > 0)
{
_delay = 0 - (maxdrift - firstmaxdrift);
}
else
{
firstmaxdrift = maxdrift;
}
maxdrift = 0;
dtAnalyse = Helper.Now.AddSeconds(analyseInterval);
}
}
_videoframes.Add(new DelayedFrame(bmp, t, _delay));
}
break;
}
return(false);
}
