I use the MF_MT_VIDEO_ROTATION attribute，but it does not take effect. The process is as follows:
1、hr = m_pReader->GetNativeMediaType(
(DWORD)MF_SOURCE_READER_FIRST_VIDEO_STREAM,
i,
&pType
);
2、hr = pType->SetUINT32(MF_MT_VIDEO_ROTATION, MFVideoRotationFormat_90);
3、hr = m_pReader->SetCurrentMediaType(
(DWORD)MF_SOURCE_READER_FIRST_VIDEO_STREAM,
NULL,
pType
);
4、hr = m_pReader->ReadSample(
(DWORD)MF_SOURCE_READER_FIRST_VIDEO_STREAM,
0,
NULL,
NULL,
NULL,
NULL
);
Where's the problem?
MF_MT_VIDEO_ROTATION gives you original rotation of the video. To use it in terms of video rotation it is insufficient to change the attribute value, you have to use APIs that actually rotate the frames, such as, for example, Video Processor MFT.
Related
Just wondering why this might be the case.
Looking over an entire media session between two WebRTC peers, it seems that some reports from the 'send' audio channel have null values for googRtt and packetsLost. Is there a reason for this?
Example:
"sendAudioChannel": {
"googCodecName": "opus",
"googRtt": null,
"bytesSent": 22636,
"packetsSent": 190,
"packetsLost": null,
"audioInputLevel": 0,
"googJitterReceived": null,
"googResidualEchoLikelihood": 0,
"googEchoCancellationReturnLoss": -100,
"googVoiceCaptureToPacketDelayMs": 0,
"googEchoCancellationReturnLossEnhancement": -100
}
This event is from half way through the call.
According to WWDC 2017, motionBlurIntensity was added as a property to SCNCamera. I've tried the following and failed to get SceneKit to blur my scene when the camera is moved:
Set wantsHDR to true
Add SCNDisableWideGamut as a Boolean with the value of YES in every Info.plist in my Xcode project
Move a SCNBox by changing its SCNNode's position in front of the camera with motionBlurIntensity set to 1.0
Move the camera itself by changing its SCNNode's position with motionBlurIntensity set to 1.0
Animate the camera using an SCNTransaction with motionBlurIntensity set to 1.0 instead of changing its position each frame
Do the above with motionBlurIntensity set to 500 or greater
I run the following code every rendered frame like so:
camNode.position = SCNVector3Make(cx, cy, cz);
camNode.eulerAngles = SCNVector3Make(rotx, roty, rotz);
camNode.camera.wantsDepthOfField = enableDOF;
camNode.camera.wantsHDR = enableHDR;
camNode.camera.zNear = camNearVal;
camNode.camera.zFar = camFarVal;
camNode.camera.focalLength = camFocalLength;
camNode.camera.usesOrthographicProjection = usingOrthoProjection;
if(!usingOrthoProjection)
{
camNode.camera.projectionTransform = SCNMatrix4FromGLKMatrix4(GLKMatrix4MakeWithArray(projection));
}
else
{
// Ortho options
camNode.camera.orthographicScale = orthoScale;
if(cam_projectionDir == 1)
camNode.camera.projectionDirection = SCNCameraProjectionDirectionHorizontal;
else
camNode.camera.projectionDirection = SCNCameraProjectionDirectionVertical;
}
// DOF
camNode.camera.sensorHeight = dof_sensorHeight;
camNode.camera.focusDistance = dof_focusDistance;
camNode.camera.fStop = dof_fStop;
camNode.camera.apertureBladeCount = dof_apertureBladeCount;
camNode.camera.focalBlurSampleCount = dof_focalBlurSampleCount;
// Motion blur
camNode.camera.motionBlurIntensity = motionBlurIntensity;
And here is where the SCNRenderer sets its pointOfView to the camera:
mainRenderer.scene = mainScene;
mainRenderer.pointOfView = camNode;
id<MTLCommandBuffer> myCommandBuffer = [_commandQueue commandBuffer];
[mainRenderer updateAtTime: currentFrame];
[mainRenderer renderWithViewport:CGRectMake(0,0,(CGFloat)_viewWidth, (CGFloat)_viewHeight) commandBuffer:myCommandBuffer passDescriptor:_renderPassDescriptor];
[myCommandBuffer commit];
HDR effects like Bloom and SSAO work properly, just not motion blur.
I'm using Xcode Version 10.1 on macOS Mojave.
I ran the Badger sample app and the motion blur in that project works on my computer.
Am I missing something here? Any insight would be greatly appreciated.
The default value of a motionBlurIntensity property is 0.0. It results in no motion blur effect. Higher values (toward a maximum of 1.0) create more pronounced motion blur effects. Motion blur is not supported when wide-gamut color rendering is enabled. Wide-gamut rendering is enabled by default on supported devices; to opt out, set the SCNDisableWideGamut key in your app's Info.plist file.
Test it with my code:
let cameraNode1 = SCNNode()
cameraNode1.camera = SCNCamera()
cameraNode1.camera?.motionBlurIntensity = 3 // MOTION BLUR
scene.rootNode.addChildNode(cameraNode1)
let move = CABasicAnimation(keyPath: "translation")
move.fromValue = NSValue(scnVector3: SCNVector3(x: 7, y: -5, z: 0))
move.toValue = NSValue(scnVector3: SCNVector3(x: 7, y: 5, z: 0))
move.duration = 0.5
move.repeatCount = 20
move.autoreverses = true
move.repeatCount = .infinity
let sphereNode1 = SCNNode()
sphereNode1.geometry = SCNSphere(radius: 2)
sphereNode1.addAnimation(move, forKey: "back and forth")
scene.rootNode.addChildNode(sphereNode1)
Works perfectly.
I have never scripted in photoshop before, so I am wondering if this is possible. The following is currently done manually for over than 300 files. The next time round is for 600 files, therefore I am looking into automating it.
Steps:
Make Image Size to 54pixels Hight and 500px Width -- Found that this is doable.
Align Image Left.
Create a text layer and insert text -- Found that this is doable.
Align Text layer 1px to the right of the image.
Trim empty space.
Would appreciate any help and pointers. Thanks.
This script will get you started: Note that in your request you didn't mention what what the original image was going to be and shrinking it to 500 x 54 is going to stretch it one way or another. Step 2, Align the image left, was omitted as you didn't mention what you are aligning this image to. I suspect you are dealing with a large image and what to shrink it down (as long as it's not smaller than 500 x 54) and work from there. I've also omitted stage 4 as I've hard coded the position of the text to be 1 px from the right hand edge (and it vertically centered with Arial font size 18)
Anhyoo.. you should be able to alter the script to your needs.
// set the source document
srcDoc = app.activeDocument;
//set preference units
var originalRulerPref = app.preferences.rulerUnits;
var originalTypePref = app.preferences.typeUnits;
app.preferences.rulerUnits = Units.POINTS;
app.preferences.typeUnits = TypeUnits.POINTS;
// resize image (ignoring the original aspect ratio)
var w = 500;
var h = 54;
var resizeRes = 72;
var resizeMethod = ResampleMethod.BICUBIC;
srcDoc.resizeImage(w, h, resizeRes, resizeMethod)
//create the text
var textStr = "Some text";
createText("Arial-BoldMT", 18.0, 0,0,0, textStr, w-1, 34)
srcDoc.activeLayer.textItem.justification = Justification.RIGHT
//set preference units back to normal
app.preferences.rulerUnits = originalRulerPref;
app.preferences.typeUnits = originalTypePref;
//trim image to transparent width
app.activeDocument.trim(TrimType.TRANSPARENT, true, true, true, true);
// function CREATE TEXT(typeface, size, R, G, B, text content, text X pos, text Y pos)
// --------------------------------------------------------
function createText(fface, size, colR, colG, colB, content, tX, tY)
{
// Add a new layer in the new document
var artLayerRef = srcDoc.artLayers.add()
// Specify that the layer is a text layer
artLayerRef.kind = LayerKind.TEXT
//This section defines the color of the hello world text
textColor = new SolidColor();
textColor.rgb.red = colR;
textColor.rgb.green = colG;
textColor.rgb.blue = colB;
//Get a reference to the text item so that we can add the text and format it a bit
textItemRef = artLayerRef.textItem
textItemRef.font = fface;
textItemRef.contents = content;
textItemRef.color = textColor;
textItemRef.size = size
textItemRef.position = new Array(tX, tY) //pixels from the left, pixels from the top
}
Everything you listed is doable in a script. I suggest you start by reading 'Adobe Intro To Scripting' in your ExtendScript Toolkit program files directory (e.g. C:\Program Files (x86)\Adobe\Adobe Utilities - CS6\ExtendScript Toolkit CS6\SDK\English)
Me again, trying to use directShow.
I tried to implement an example from a camera-distributor to read the camera (I would like to get frames in Form of an Byte-Array) and am getting a VFW_E_NOT_IN_GRAPH-Error when trying to connect the pins.
I already searched and now know, that that means, I didn't add a specific Filter to the graphbuilder (or the filter I used isn't compatible?), but I added a Filter and can't see any differences to the sample... however, the sample isn't a project, but only code-scraps, so I think I may have forgotten any initialization...
Could you please take a look at this and tell me whether you find an error?
Everything works find without error, just the last hr is filled with 0x8004025F and nothing happens (I made a stop-point within DoRenderSample-method):
HRESULT hr = S_OK;
IBaseFilter* pFilter=0;
hr=CreateKernelFilter(
CLSID_VideoInputDeviceCategory,
L"Videology USB-C Camera",
&pFilter
);
CoInitialize(NULL);
// CComQIPtr<IVideology20K1XX> pKs(pFilter);
CComQIPtr<IVideologyCommon> pKs( pFilter );
if(pFilter==0)return;
// hr=pKs->SetWhiteBalanceMode(wbAuto);
CBitmapRenderer *m_pSnapshotter = new CBitmapRenderer( _T("Bitmap renderer"), NULL, &hr );
if( FAILED(hr) )
{
ASSERT("Couldn't create bitmap renderer.");
return;
}
m_pSnapshotter->SetCallback( (IBitmapCallback*) this );
CComQIPtr< IBaseFilter > pGrabBase( m_pSnapshotter );
IGraphBuilder* m_pGraphBuilder=0;
hr = CoCreateInstance(CLSID_FilterGraph, NULL,
CLSCTX_INPROC_SERVER, IID_IGraphBuilder, (void **)&m_pGraphBuilder);
hr = m_pGraphBuilder->AddFilter( pGrabBase, L"Snapshot" );
CComPtr<IPin> pOutPin;
hr= pFilter->FindPin( L"1", &pOutPin );
CBasePin* pInPin = m_pSnapshotter->GetPin( 0 );
hr = m_pGraphBuilder->Connect( pOutPin, pInPin );
I hope I didn't forget any important informations...
(Using C++-Builder from embarcadero XE2 16 and DirectShow9 from 2005 I think)
The error code tells you what is wrong. VFW_E_NOT_IN_GRAPH, something is not in graph. You connect two pins, which belong to two filters. One of the filters is not in graph. As you add pGrabBase a few lines above, then the other filter is not in the graph. Add it as well prior to connecting pins.
Whether I use XTextFormatter or not, I get the same error about the LayoutRectangle having to have a height of 0 or something like this.
new PdfSharp.Drawing.Layout.XTextFormatter(_gfx).DrawString(text
, new PdfSharp.Drawing.XFont(fontName, fontSize, (PdfSharp.Drawing.XFontStyle)fontStyle)
, new PdfSharp.Drawing.XSolidBrush(PdfSharp.Drawing.XColor.FromArgb(foreColour))
, new PdfSharp.Drawing.XRect(new PdfSharp.Drawing.XPoint(xPos, yPos), new PdfSharp.Drawing.XPoint(xLimit, yLimit))
, PdfSharp.Drawing.XStringFormats.Default);
fontStyle is of type System.Drawing.FontStyle
foreColour is of type System.Drawing.Color
I have already predefined _gfx from a PdfPage with Orientation = Landscape, Size = Letter
xPos and yPos are parameters of type double, the same with xLimit and yLimit.
I get the runtime error that the
LayoutRectangle must have a height of
zero (0)...
Per definition a rectangle is meant to have a height, otherwise call it a line! I don't get it!...
I tried with the XGraphics.DrawString() method directly, and I get the same error. It seems that I can't use the LayoutRectangle but have to manage that the text fit within the desired area manually.
var textFont = new PdfSharp.Drawing.XFont(fontName, fontSize, (PdfSharp.Drawing.XFontStyle)fontStyle);
while (xPos + _gfx.MeasureString(text, textFont).Width > xLimit)
textFont = new PdfSharp.Drawing.XFont(fontName, --fontSize, (PdfSharp.Drawing.XFontStyle)fontStyle);
while (yPos + _gfx.MeasureString(text, textFont).Height > yLimit && fontSize > 0)
textFont = new PdfSharp.Drawing.XFont(fontName, --fontSize, (PdfSharp.Drawing.XFontStyle)fontStyle);
_gfx.DrawString(text
, textFont
, new PdfSharp.Drawing.XSolidBrush(PdfSharp.Drawing.XColor.FromArgb(foreColour))
, new PdfSharp.Drawing.XPoint(xPos, yPos));
Though the yPos variable value is the exact same value!
*yPos = Page.Height * .4093, either 40,93% of the page's height.*
Herewith an example of what I try to do:
"Hello World!" "Hello
World!"
And here is what I get:
"Hello World!"
"Hello World!"
And because of different printing area limits and size of the font and the different font style, I can't just write these into one simple sentence including the correct number of spaces.
Quoting error messages exactly helps others to help you.
The error message reads:
DrawString: With XLineAlignment.BaseLine the height of the layout rectangle must be 0.
The text will be aligned at a line, therefore height must be 0. Yes, that's a line.
Use a different alignment if you specify a rectangle.
The TextLayout sample shows how to format text.
The Graphics sample also shows how to layout text (single lines of text, no automatic line breaks; the technique shown in the TextLayout sample handles line breaks automatically using the XTextFormatter class).
While trying to figure out how text positioning works with PdfSharp, I noticed that the DrawString() method writes on top of the Y coordinate that we specify.
If I wish to write at (0, 100)(x, y), this points to the lower-left corner while I thought this was the top-left corner coordinates. As a result, the text string Y coordinate that I should have specified is 100 + string.Height * .6.
PdfDocument pdfDoc = new PdfDocument();
PdfPage pdfPage = new pdfPage();
pdfPage.Size = PageSize.Letter;
pdfPage.Orientation = Orientation.Landscape;
pdfDoc.Pages.Add(pdfPage);
double posX = 0;
double posY = pdfPage.Height * .4093;
string helloString = "Hello"
string worldString = "World!"
XFont helloFont = new XFont("Helvetica", 25, XFontStyle.Regular);
XFont worldFont = new XFont("Helvetica", 270, XFontStyle.Bold);
using(var pdfGfx = XGraphics.FromPdfPage(pdfPage)) { // assuming the default Point UOM
XSize helloStringSize = pdfGfx.MeasureString(helloString, helloFont);
XSize worldStringSize = pdfGfx.MeasureString(worldString, worldFont);
pdfGfx.DrawString(helloString
, helloFont
, XBrushes.Black
, posX
, posY + helloStringSize.Height * .6
, XStringFormats.Default);
pdfGfx.DrawString(worldString
, worldFont
, XBrushes.Black
, pdfPage.Width * .3978
, posY + (worldStringSize.Height + helloStringSize.Height) * .6
, XStringFormats.Default);
}
You'll perhaps wonder why I only add 60% of the string size when I want to get my string written below my Y coordinate? That is because the full height of the font includes somekind of leap on top. So, the computing result will not be what is expected. On the other hand, you don't have to care about a leap if you need one. In my particular case, I don't require leap, so I must take it off the string's height.
If you feel like my explanation needs more accurate details, please feel free to either add them as comments or keep me informed so that I may include them.
Thanks!