Replies to This Discussion

Permalink Reply by Andrew Fernie on June 24, 2011 at 9:19am

I am running the planner on XP with a Diamond TVW750U USB dongle - this has both analog video and TV antenna inputs. Up until version 14 of the planner I got the "camera fail" error. With version 16 I don't get the error, but only get video noise, and the noise pattern changes if I touch the antenna input (no, I haven't attached a real antenna). If I then start AMCap, which I have configured to work with the video input of the Diamond, the picture comes through properly in APM planner. I can then close AMCAP and everything is fine. If I have to restart APM planner  I have to start up AmCap also to get the picture back.

 

I have made sure that I have the latest drivers for the Diamond.

 

I suspect that there is something missing in the APM planner initialization code that leaves it in a default TV antenna input mode.

 

The behavior is identical to what I get with HK GCS.

 

Andrew 

 

p.s. This is a great piece of code. I will be working on a sunshield to allow me to use it on my laptop at the field for my next flight.

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Permalink Reply by Andrew Fernie on June 24, 2011 at 9:40am

I downloaded the source this morning and have got it to build in VC2010 so if there are any changes you would like me to try please let me know.

 

The only issue I had with the build was that planetracker.png was missing from the repository so I had to create a temporary file to substitute.

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Permalink Reply by Andrew Fernie on June 24, 2011 at 2:15pm

O.K. after an afternoon in google learning (as little as I could get away with) about DirectShow it appears that a video crossbar is required in the filter graph. The following works for me - it checks to see if a video crossbar was created by the CaptureGraphBuilder2 constructor, and if so it tries to connect a composite video input pin to the video decoder output pin.

This replaces the routine SetConfigParms in capture.cs

I don't have any way of checking if it properly handles the case where there was no crossbar detected so that will need to be verified. I hope this helps.


// Set the Framerate, and video size
private void SetConfigParms(ICaptureGraphBuilder2 capGraph, IBaseFilter capFilter, int iFrameRate, int iWidth, int iHeight)
{
int hr;
object o;
AMMediaType media;

// NEW CODE STARTS HERE
IAMCrossbar crossbar = null;

hr = capGraph.FindInterface(PinCategory.Capture, MediaType.Video, capFilter, typeof(IAMCrossbar).GUID, out o);
if (hr >= 0)
{
crossbar = (IAMCrossbar)o;
int oPin, iPin;
int ovLink, ivLink;
ovLink = ivLink = 0;

crossbar.get_PinCounts(out oPin, out iPin);
int pIdxRel;
PhysicalConnectorType tp;
for (int i = 0; i < iPin; i++)
{
crossbar.get_CrossbarPinInfo(true, i, out pIdxRel, out tp);
if (tp == PhysicalConnectorType.Video_Composite) ivLink = i;
}

for (int i = 0; i < oPin; i++)
{
crossbar.get_CrossbarPinInfo(false, i, out pIdxRel, out tp);
if (tp == PhysicalConnectorType.Video_VideoDecoder) ovLink = i;
}

try
{
crossbar.Route(ovLink, ivLink);
o = null;
}

catch
{
throw new Exception("Failed to get IAMCrossbar");
}
}
else
{
throw new Exception("Failed to get IAMCrossbar");
}

// NEW CODE ENDS HERE

// Find the stream config interface
hr = capGraph.FindInterface(
PinCategory.Capture, MediaType.Video, capFilter, typeof(IAMStreamConfig).GUID, out o);

IAMStreamConfig videoStreamConfig = o as IAMStreamConfig;
if (videoStreamConfig == null)
{
throw new Exception("Failed to get IAMStreamConfig");
}

// Get the existing format block
hr = videoStreamConfig.GetFormat( out media);
DsError.ThrowExceptionForHR( hr );

// copy out the videoinfoheader
VideoInfoHeader v = new VideoInfoHeader();
Marshal.PtrToStructure( media.formatPtr, v );

// if overriding the framerate, set the frame rate
if (iFrameRate > 0)
{
v.AvgTimePerFrame = 10000000 / iFrameRate;
}

// if overriding the width, set the width
if (iWidth > 0)
{
v.BmiHeader.Width = iWidth;
}

// if overriding the Height, set the Height
if (iHeight > 0)
{
v.BmiHeader.Height = iHeight;
}

// Copy the media structure back
Marshal.StructureToPtr( v, media.formatPtr, false );

// Set the new format
hr = videoStreamConfig.SetFormat( media );
DsError.ThrowExceptionForHR( hr );

DsUtils.FreeAMMediaType(media);
media = null;
}

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Permalink Reply by Andrew Fernie on June 24, 2011 at 4:43pm

My other computer has a standard webcam so I managed to try the case that does not need a crossbar. Silly mistake - please delete the final "else" statement.

     else
     {
     throw new Exception("Failed to get IAMCrossbar");
     }

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DeveloperPermalink Reply by Michael Oborne on June 24, 2011 at 5:43pm

Andrew and others, i will add this code today, and upload a new exe later on.

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Permalink Reply by Andrew Fernie on June 26, 2011 at 10:24am

Just downloaded 1.0.18 and it works fine with my video capture device.

 

Thank you,

Andrew

Permalink Reply by Tassos Polichronopoulos on June 27, 2011 at 12:42am

Hi,

downloaded 1.0.18, but still getting the same msg with lifeview.

Tassos

DeveloperPermalink Reply by Michael Oborne on June 27, 2011 at 6:16pm

Tassos,

 

you will need to give me a screen shot of graphview i think

http://www.videohelp.com/tools/GraphEdit
you will need to add your capture device and then click on one of the pins and click render. and give me a screen shot.
thats about the only way i can think of doing it.

 

Michael

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DeveloperPermalink Reply by Michael Oborne on July 7, 2011 at 3:35am

i may have found an answer to this one. i got a easycap for myself, and odly enough it did not work. so the next planner version should work with those other devices that are not working currently.

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Permalink Reply by dudz on April 18, 2012 at 5:13am

Hi

Transmitting via gopro hd cam and 1.3ghz tx/rx. Rx plugged into the usb grabber (Easycap) to pc. 1 second delay on video stream, and if the receiver looses signal for more than a few seconds, an error message reads ''problem with capture device, grabbing frame took longer than 5 secs" , then I have to go into the config / planner tab to restart the video. Is this because this is a cheap grabber ?

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