LEAD Support Forum   Resource to find answers and post technical questions about LEAD products. Search       Forums Home

Re: Apparent callback filter timeout when ReceiveProc is called Started by twhif at 01-18-2008 1:27. Topic has 4 replies. LEAD Support Fo... » Developer » Multimedia Filt... » Re: Apparent callback filter timeout when ReceiveProc is called

Search

01-18-2008, 1:27 twhif Joined on 12-30-2007 Posts 11 Apparent callback filter timeout when ReceiveProc is called When using a callback filter with the ltmmConvertCtrl object in .NET (C#), I run into a situation where there appears to be a timeout if the ILMVUserCallback.ReceiveProc method takes too long (i.e. over 550 milliseconds). When this happens the ltmmConvertCtrl.Complete event gets fired without all frames being sent through the ReceiveProc method. Is there a timeout when the ReceiveProc method is called and if so can it be adjusted to allow for a longer time?    Report

01-20-2008, 11:24 Qasem Lubani Joined on 08-13-2006 Posts 1,187 Re: Apparent callback filter timeout when ReceiveProc is called When you run a filter graph, DirectShow controls the timeout process if the filter is suspended for too long. Unfortunately, there is no function in LEADTOOLS to control the timeout period when using the Video Callback filter in a conversion graph. However, there is another approach you could use that might work even with longer delays. Instead of using the callback filter, try to split the video stream into individual frames in a way similar to what the 'Splitting an AVI File into Multiple Bitmaps Using ltmmSampleTarget' help file code sample does. Qasem Al-Lubani LEAD Technical Support www.leadtools.com    Report

01-22-2008, 10:51 twhif Joined on 12-30-2007 Posts 11 Re: Apparent callback filter timeout when ReceiveProc is called I have tried the ltmmSampleTarget approach and ran into the same problem described in another thread (defect 6420AMN, http://support.leadtools.com/SupportPortal/cs/forums/17972/ShowPost.aspx) where the second time I call ltmmSampleTarget.GetSample it allways times out. According to this thread this is still an open issue. Any update on resolving this issue would be useful to know moving forward.    Report

01-23-2008, 2:46 Qasem Lubani Joined on 08-13-2006 Posts 1,187 Re: Apparent callback filter timeout when ReceiveProc is called The was assigned to an engineer but is still marked as "Open". I have added this forum post to be notified when the issue is addressed. I will notify you as soon as I hear back form our engineers. Qasem Al-Lubani LEAD Technical Support www.leadtools.com    Report

02-15-2010, 10:20 Walter Joined on 04-14-2008 Charlotte, NC Posts 278 Re: Apparent callback filter timeout when ReceiveProc is called For those experiencing this same issue, incident number 6420AMN was determined to not be a bug for the following reason: The problem is the garbage collector. It does not release the sample in a timely manner, and the video renderer has no more to give. This can be solved with the following code: Private Sub Timer1_Tick(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles Timer1.Tick ' get a sample and pass it along Dim sample As LTMMLib.IltmmMediaSampleDisp sample = SampleTarget.GetSample(1000) SampleSource.DeliverSample(1000, sample) System.Runtime.InteropServices.Marshal.ReleaseComObject(sample) End Sub If after this you continue to have issue regarding this, please send a small sample project (not your entire application) which isolates this issue to support@leadtools.com, so that we may look into the matter further. Please also include a link referencing this forum posting, as well as a detailed description of exactly the problem you're having so that we can assist you further. Walter Technical Support LEADTOOLS support@leadtools.com    Report

LEAD Support Fo... » Developer » Multimedia Filt... » Re: Apparent callback filter timeout when ReceiveProc is called

(please select) Forums Home |- Search Forums |- Active Topics |- Unanswered Posts User Options |- Sign In |- Create a New Account |- Forgot Password General |- Feature Requests |- Example Requests |- Support Site Suggestions Enduser |- ePrint |-- FAQ |- Multimedia Codec's |- Capture & Convert |- Capture & Present |- Photoshop Plugins |- LEADViEW LEAD/Axtel Barcode SDK |- LEAD/Axtel FAQ |- Barcode Developer |- FAQ |- General |- Image Processing |- Image Compression |-- Examples |- Color Conversion |- Image Display |- Special Effects |- Multimedia |- Internet |-- Examples |- File Formats |- Scanning/Capture |- Common Dialogs |- Printing |- Annotations |- Database |- DICOM/Medical Imaging |- OCR |- JBIG |- Vector |- PDF |- ePrint API |- Multimedia Filter Pack API |- DotNet |-- Winform controls on the web |-- Silverlight |-- Windows Workflow Foundation |-- WCF |-- COM Interop |-- WPF |- Deployment |- Forms Recognition |- JPIP |- Virtual Printer |- CD/DVD Writing