private void btnJump_Click(object sender, EventArgs e)
{
// 跳到
if (_reader != null)
{
// 指定帧的编号
double time = ((double)_reader.FrameCount / _reader.FrameRate) * 2 / 3;
// 跳到指定帧附近的关键帧处，true 为跳到关键帧，false 为跳到任意帧
_reader.Seek(time, false);
}
ShowNextFrame();
}
public void Seek(float percentage)
{
int t = Convert.ToInt32((Duration / 1000d) * percentage);
if (Seekable)
{
_sw.Stop();
_initialSeek = t;
_vfr.Seek(t);
_sw.Reset();
_sw.Start();
}
}
private void FfmpegListener()
{
_reasonToStop = ReasonToFinishPlaying.StoppedByUser;
_vfr = null;
bool open = false;
string errmsg = "";
_realtime = !IsFileSource;
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 = _realtime;
_vfr.RTSPMode = RTSPMode;
_vfr.Open(_source);
open = true;
}
catch (Exception ex)
{
MainForm.LogErrorToFile(ex.Message + ": " + _source);
}
finally
{
try
{
Program.FFMPEGMutex.ReleaseMutex();
}
catch (ObjectDisposedException)
{
//can happen on shutdown
}
}
if (_vfr == null || !_vfr.IsOpen || !open)
{
ShutDown("Could not open stream" + ": " + _source);
return;
}
if (_stopEvent.WaitOne(0))
{
ShutDown("");
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;
if (HasAudioStream != null)
{
HasAudioStream(this, EventArgs.Empty);
}
}
HasAudioStream = null;
Duration = _vfr.Duration;
if (!_realtime)
{
_tOutput = new Thread(FrameEmitter)
{
Name = "ffmpeg frame emitter"
};
_tOutput.Start();
}
else
{
_tOutput = null;
}
_videoframes = new List <DelayedFrame>();
_audioframes = new List <DelayedAudio>();
double maxdrift = 0, firstmaxdrift = 0;
const int analyseInterval = 10;
DateTime dtAnalyse = DateTime.MinValue;
//LastFrame = Helper.Now;
if (_initialSeek > -1)
{
_vfr.Seek(_initialSeek);
}
try
{
while (!_stopEvent.WaitOne(5) && !MainForm.Reallyclose && NewFrame != null)
{
_bufferFull = !_realtime && (_videoframes.Count > MAXBuffer || _audioframes.Count > MAXBuffer);
if (!_paused && !_bufferFull)
{
if (DecodeFrame(analyseInterval, hasaudio, ref firstmaxdrift, ref maxdrift, ref dtAnalyse))
{
break;
}
if (_realtime && !_stopEvent.WaitOne(0))
{
if (_videoframes.Count > 0)
{
DelayedFrame q = _videoframes[0];
if (q.B != null)
{
if (NewFrame != null)
{
NewFrame(this, new NewFrameEventArgs(q.B));
}
q.B.Dispose();
}
_videoframes.RemoveAt(0);
}
if (_audioframes.Count > 0)
{
DelayedAudio q = _audioframes[0];
if (q.A != null)
{
ProcessAudio(q.A);
}
_audioframes.RemoveAt(0);
}
}
}
}
}
catch (Exception e)
{
MainForm.LogExceptionToFile(e);
errmsg = e.Message;
}
if (SampleChannel != null)
{
SampleChannel.PreVolumeMeter -= SampleChannelPreVolumeMeter;
SampleChannel = null;
}
if (_waveProvider != null)
{
if (_waveProvider.BufferedBytes > 0)
{
_waveProvider.ClearBuffer();
}
}
if (_tOutput != null)
{
try
{
if (!_tOutput.Join(TimeSpan.Zero))
{
_tOutput.Join();
}
}
catch {}
}
ShutDown(errmsg);
}
private void FfmpegListener()
{
_reasonToStop = ReasonToFinishPlaying.StoppedByUser;
_vfr = null;
bool open = false;
string errmsg = "";
_realtime = !IsFileSource;
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 = _realtime;
_vfr.RTSPMode = RTSPMode;
_vfr.Open(_source);
open = true;
}
catch (Exception ex)
{
MainForm.LogErrorToFile(ex.Message+": "+_source);
}
finally
{
try
{
Program.FFMPEGMutex.ReleaseMutex();
}
catch (ObjectDisposedException)
{
//can happen on shutdown
}
}
if (_vfr == null || !_vfr.IsOpen || !open)
{
ShutDown("Could not open stream" + ": " + _source);
return;
}
if (_stopEvent.WaitOne(0))
{
ShutDown("");
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;
if (HasAudioStream != null)
{
HasAudioStream(this, EventArgs.Empty);
}
}
HasAudioStream = null;
Duration = _vfr.Duration;
if (!_realtime)
{
_tOutput = new Thread(FrameEmitter) {Name="ffmpeg frame emitter"};
_tOutput.Start();
}
else
{
_tOutput = null;
}
_videoframes = new List<DelayedFrame>();
_audioframes = new List<DelayedAudio>();
double maxdrift = 0, firstmaxdrift = 0;
const int analyseInterval = 10;
DateTime dtAnalyse = DateTime.MinValue;
//LastFrame = Helper.Now;
if (_initialSeek>-1)
_vfr.Seek(_initialSeek);
try
{
while (!_stopEvent.WaitOne(5) && !MainForm.Reallyclose && NewFrame!=null)
{
_bufferFull = !_realtime && (_videoframes.Count > MAXBuffer || _audioframes.Count > MAXBuffer);
if (!_paused && !_bufferFull)
{
if (DecodeFrame(analyseInterval, hasaudio, ref firstmaxdrift, ref maxdrift, ref dtAnalyse)) break;
if (_realtime && !_stopEvent.WaitOne(0))
{
if (_videoframes.Count > 0)
{
DelayedFrame q = _videoframes[0];
if (q.B != null)
{
if (NewFrame != null)
{
NewFrame(this, new NewFrameEventArgs(q.B));
}
q.B.Dispose();
}
_videoframes.RemoveAt(0);
}
if (_audioframes.Count > 0)
{
DelayedAudio q = _audioframes[0];
if (q.A != null)
{
ProcessAudio(q.A);
}
_audioframes.RemoveAt(0);
}
}
}
}
}
catch (Exception e)
{
MainForm.LogExceptionToFile(e);
errmsg = e.Message;
}
if (SampleChannel != null)
{
SampleChannel.PreVolumeMeter -= SampleChannelPreVolumeMeter;
SampleChannel = null;
}
if (_waveProvider != null)
{
if (_waveProvider.BufferedBytes > 0)
_waveProvider.ClearBuffer();
}
if (_tOutput != null)
{
try
{
if (!_tOutput.Join(TimeSpan.Zero))
_tOutput.Join();
}
catch {}
}
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)
{
MainForm.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;
}
if (_stopEvent.WaitOne(0))
{
ShutDown("");
return;
}
bool hasaudio = false;
if (_vfr.Channels > 0)
{
hasaudio = true;
RecordingFormat = new WaveFormat(_vfr.SampleRate, 16, _vfr.Channels);
_waveProvider = new BufferedWaveProvider(RecordingFormat);
_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();
if (_initialSeek > -1)
_vfr.Seek(_initialSeek);
try
{
while (!_stopEvent.WaitOne(5) && !MainForm.ShuttingDown)
{
var nf = NewFrame;
if (nf == null)
break;
if (!_paused)
{
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 != null)
{
if (data.Length > 0)
{
ProcessAudio(data);
}
}
}
break;
case 2:
LastFrame = DateTime.UtcNow;
if (frame != null)
{
var bmp = frame as Bitmap;
if (bmp != null)
{
if (_videoQueue.Count < 20)
_videoQueue.Enqueue(bmp);
}
}
break;
}
}
}
}
catch (Exception e)
{
MainForm.LogExceptionToFile(e, "FFMPEG");
errmsg = e.Message;
}
_eventing.Join();
if (_sampleChannel != null)
{
_sampleChannel.PreVolumeMeter -= SampleChannelPreVolumeMeter;
_sampleChannel = null;
}
if (_waveProvider != 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)
{
MainForm.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;
}
if (_stopEvent.WaitOne(0))
{
ShutDown("");
return;
}
bool hasaudio = false;
if (_vfr.Channels > 0)
{
hasaudio = true;
RecordingFormat = new WaveFormat(_vfr.SampleRate, 16, _vfr.Channels);
_waveProvider = new BufferedWaveProvider(RecordingFormat);
_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();
if (_initialSeek > -1)
{
_vfr.Seek(_initialSeek);
}
try
{
while (!_stopEvent.WaitOne(5) && !MainForm.ShuttingDown)
{
var nf = NewFrame;
if (nf == null)
{
break;
}
if (!_paused)
{
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 != null)
{
if (data.Length > 0)
{
ProcessAudio(data);
}
}
}
break;
case 2:
LastFrame = DateTime.UtcNow;
if (frame != null)
{
var bmp = frame as Bitmap;
if (bmp != null)
{
if (_videoQueue.Count < 20)
{
_videoQueue.Enqueue(bmp);
}
}
}
break;
}
}
}
}
catch (Exception e)
{
MainForm.LogExceptionToFile(e, "FFMPEG");
errmsg = e.Message;
}
_eventing.Join();
if (_sampleChannel != null)
{
_sampleChannel.PreVolumeMeter -= SampleChannelPreVolumeMeter;
_sampleChannel = null;
}
if (_waveProvider != null)
{
if (_waveProvider.BufferedBytes > 0)
{
_waveProvider.ClearBuffer();
}
}
ShutDown(errmsg);
}
