public async void SeparateThreadToSaveVideoStream()
{
while (isRecording == true)
{
//thread is counting
//sometimes stuck at thread at frame : 0, depending on the window chosen to record
//meaning OnFrameArrived is not called
if (parent != null)
{
DateTime currentTimeLocal = DateTime.Now;
TimeSpan elpasedTimeLocal = currentTimeLocal - initialRecordTime;
string debugstr = "At frame: " + counter.ToString() + " Threadcounter: " + threadcounter.ToString();
//debugstr += " StreamSize: " + ((int)(videostream.Size / 1024.0)).ToString() + "KB TimeElapsed: " + ((int)elpasedTimeLocal.TotalSeconds).ToString();
debugstr += " StreamSize: " + ((int)(totalMemoryUsed / 1024.0)).ToString() + " KB";
debugstr += " TimeElapsed: " + ((int)elpasedTimeLocal.TotalSeconds).ToString();
parent.msg(debugstr);
}
threadcounter++;
if (threadcounter > 200000)
{
threadcounter = 0;
}
if (currentFrame != null)
{
CanvasBitmap canvasBitmap = CanvasBitmap.CreateFromDirect3D11Surface(
canvasDevice,
currentFrame.Surface);
using (var inputstream = new InMemoryRandomAccessStream())
{
CancellationToken ct = new CancellationToken();
await canvasBitmap.SaveAsync(inputstream, CanvasBitmapFileFormat.Png, 1f).AsTask(ct);
ulong currentFrameLength = inputstream.Size;
_currentVideoStreamPos = 0;
totalMemoryUsed += currentFrameLength;
DateTime currentTimeLocal = DateTime.Now;
TimeSpan diff = currentTimeLocal - previousRecordTime;
previousRecordTime = currentTimeLocal;
UnpackItem unpackItem = new UnpackItem();
unpackItem.pos = _currentVideoStreamPos;
unpackItem.length = currentFrameLength;
unpackItem.frameTime = diff;
unpackItem.compressedBuffer = new Windows.Storage.Streams.Buffer((uint)inputstream.Size);
inputstream.Seek(0);
await inputstream.ReadAsync(unpackItem.compressedBuffer, (uint)inputstream.Size, InputStreamOptions.None); //read from stream to buffer
await inputstream.FlushAsync();
unpackList.Add(unpackItem);
}
currentFrame?.Dispose();
currentFrame = null; //need this line so this thread will continue loop when new frame is not yet ready
}
else
{
Thread.Sleep(10);
}
}
//await CloseVideoStream();
int len = unpackList.Count;
DateTime currentTime = DateTime.Now;
TimeSpan elpasedTime = currentTime - initialRecordTime;
string debugstrx = "Num frame: " + len.ToString() + " Threadcounter: " + threadcounter.ToString();
debugstrx += " TimeElapsed: " + ((int)elpasedTime.TotalSeconds).ToString();
if (elpasedTime.TotalSeconds > 0)
{
debugstrx += " Frame Rate (fps) : " + (len / (double)elpasedTime.TotalSeconds).ToString();
}
if (parent != null)
{
parent.StartWritingReport(debugstrx);
}
//await UnpackVideoStream();
}
/// <summary>
/// //Encoding a Win2D surface (CanvasRenderTarget) as a video frame
/// </summary>
private async void OnMSSSampleRequested(MediaStreamSource sender, MediaStreamSourceSampleRequestedEventArgs args)
{
if (parent != null)
{
parent.StartWritingOutput("OnSampleRequested " + frameCounter.ToString(), 0);
}
if (unpackList == null)
{
if (parent != null)
{
parent.StartWritingOutput("Unpack List Null Error!", 1);
}
//this will stop the encoding
args.Request.Sample = null;
return;
}
int len = unpackList.Count;
if (frameCounter >= len)
{
if (parent != null)
{
parent.StartWritingOutput("Encoding Completed.", 1);
}
//this will stop the encoding
args.Request.Sample = null;
return;
}
if ((frameCounter < 0) || (0 == len))
{
if (parent != null)
{
parent.StartWritingOutput("Invalid Frame", 1);
}
//this will stop the encoding
args.Request.Sample = null;
return;
}
//need deferral because CanvasBitmap.LoadAsync takes some time to complete ?
var deferral = args.Request.GetDeferral();
///
UnpackItem unpackItem = unpackList[frameCounter];
Windows.Storage.Streams.Buffer buffer = unpackItem.compressedBuffer;
InMemoryRandomAccessStream inMemoryRandomAccessStream = null;
using (inMemoryRandomAccessStream = new InMemoryRandomAccessStream())
{
await inMemoryRandomAccessStream.WriteAsync(buffer);
await inMemoryRandomAccessStream.FlushAsync();
inMemoryRandomAccessStream.Seek(0);
CanvasBitmap tempBitmap = null;
try
{
tempBitmap = await CanvasBitmap.LoadAsync(CanvasDevice.GetSharedDevice(), inMemoryRandomAccessStream);
}
catch (Exception e)
{
if (parent != null)
{
parent.StartWritingOutput("CBM Error : " + e.Message, 1);
}
}
if (tempBitmap != null)
{
CanvasRenderTarget canvasRenderTarget = new CanvasRenderTarget(CanvasDevice.GetSharedDevice(), tempBitmap.SizeInPixels.Width, tempBitmap.SizeInPixels.Height, tempBitmap.Dpi);
using (CanvasDrawingSession session = canvasRenderTarget.CreateDrawingSession())
{
session.Clear(Colors.Black);
//session.DrawEllipse(new System.Numerics.Vector2(120 + frameCounter * 2, 100), 30, 20, Colors.White);
session.DrawImage(tempBitmap);
}
TimeSpan timeLapsed = unpackItem.frameTime;
Timestamp += timeLapsed;
//set sample after defferal ? nope ....stop at 1st frame...
MediaStreamSample sample = MediaStreamSample.CreateFromDirect3D11Surface(canvasRenderTarget, Timestamp);
args.Request.Sample = sample;
deferral.Complete();
}
else
{
args.Request.Sample = null;
deferral.Complete();
}
frameCounter++;
}
}
public async Task UnpackToMp4()
{
MediaComposition mediacomposition = new MediaComposition();
StorageFolder pictureFolder = KnownFolders.SavedPictures;
{
int len = simpleRecorder.unpackList.Count;
for (int i = 0; i < len; i++)
{
UnpackItem unpackItem = simpleRecorder.unpackList[i];
Windows.Storage.Streams.Buffer buffer = unpackItem.compressedBuffer;
InMemoryRandomAccessStream inMemoryRandomAccessStream = null;
using (inMemoryRandomAccessStream = new InMemoryRandomAccessStream())
{
await inMemoryRandomAccessStream.WriteAsync(buffer);
await inMemoryRandomAccessStream.FlushAsync();
inMemoryRandomAccessStream.Seek(0);
CanvasBitmap tempBitmap = await CanvasBitmap.LoadAsync(CanvasDevice.GetSharedDevice(), inMemoryRandomAccessStream);
if (tempBitmap != null)
{
CanvasRenderTarget canvasRenderTarget = new CanvasRenderTarget(CanvasDevice.GetSharedDevice(), tempBitmap.SizeInPixels.Width, tempBitmap.SizeInPixels.Height, 96);
using (CanvasDrawingSession session = canvasRenderTarget.CreateDrawingSession())
{
session.Clear(Colors.Black);
session.DrawImage(tempBitmap);
TimeSpan frameTime30Mil = TimeSpan.FromMilliseconds(30f);
TimeSpan frameTime = unpackItem.frameTime;
//if (frameTime < frameTime30Mil)
// frameTime = frameTime30Mil;
MediaClip mediaclip = MediaClip.CreateFromSurface(canvasRenderTarget, frameTime);
mediacomposition.Clips.Add(mediaclip);
}
string str = "Adding Clips " + (i + 1).ToString() + " / " + len.ToString();
if (i == len - 1)
{
str += " ... Please wait for file rendering ...";
}
TextOutput.Text = str;
}
}
//free up memory recources as each frame is unpacked
if (unpackItem.compressedBuffer != null)
{
unpackItem.compressedBuffer = null;
}
} //for
}
StorageFile mp4file = null;
if (simpleRecorder.savefile != null)
{
mp4file = simpleRecorder.savefile;
}
else
{
string mp4filename = "SavedVideo" + ".mp4";
mp4file = await pictureFolder.CreateFileAsync(
mp4filename,
CreationCollisionOption.ReplaceExisting);
}
//await mediacomposition.RenderToFileAsync(mp4file, MediaTrimmingPreference.Precise, MediaEncodingProfile.CreateMp4(VideoEncodingQuality.HD720p));
var rendering = mediacomposition.RenderToFileAsync(mp4file, MediaTrimmingPreference.Precise, MediaEncodingProfile.CreateMp4(VideoEncodingQuality.HD720p));
rendering.Progress += ProgressReport;
rendering.Completed += CompletedReport;
}