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In the suggested MSDN forum (searching for "audio video sync") I found a lot of people that had the same problem as me. The common denominator seems to be setups where the tv card does not have an audio input and where audio capture must occur on the sound card. I also have this setup.
One guy solved the problem by increasing the buffer size of the video capture output pin though...
2006-05-04 14:13:53 UTC in DirectShow .NET
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I created the IConfigAviMux object from the mux and set the master stream like this:
IBaseFilter mux;
IFileSinkFilter sink;
hr = captureGraphBuilder.SetOutputFileName(MediaSubType.Avi, @"c:\tvtest.avi", out mux, out sink);
...
IConfigAviMux muxConfig = null;
muxConfig = (IConfigAviMux)mux;
// Audio should be on the second pin
// since it was added after the video...
2006-05-04 09:53:42 UTC in DirectShow .NET
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Good morning!
How do I create an IConfigAviMux object? I can´t do it through the Filter Graph Manager nor the Capture Graph Bulder. I thought I´d test this before I update my drivers.
2006-05-04 07:18:40 UTC in DirectShow .NET
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I found some good reading :-P on MSDN regarding audio and video synchronization:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/directshow/htm/referenceclocks.asp
"One function of the Filter Graph Manager is to synchronize all of the filters in the graph to the same clock, called the reference clock.
Any object that exposes the IReferenceClock interface can act as...
2006-05-03 15:13:00 UTC in DirectShow .NET
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I managed to set height, width and framerate using IAMStreamConfig.SetFormat. Thanks!
"I can't think of any way to address this in a running graph."
Can you think of any other way of syncing the audio and video? Is there any chance I can run the captured avi file through another graph, splitting the audio and video and then syncing them?.
2006-05-03 11:46:02 UTC in DirectShow .NET
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Thanks for replying snarfle and thanks for the work you and your friends have put into this project.
Since my post I have investigated my problem some more. I have tried all of the different audio and video compression filters I have installed on my computer, to see if there is a difference in how much the audio and video gets out of sync. Nothing has served as a fix form my problem. But some...
2006-05-03 09:08:41 UTC in DirectShow .NET
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I am trying to capture audio and video from a tv tuner to a file. The audio and video gets out of sync in the avi file. The video runs faster than the audio. I am previewing at the same time as capturing to a file and the preview audio and video is in sync.
This is my graph: http://www.lagertech.com/graph.gif
I am using the indeo compression filter for simplicity and I set it to...
2006-05-02 14:24:52 UTC in DirectShow .NET
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Great stuff! Thanks! Fiddling with my graph I figured out that if I manually reset the crossbar properties I would get sound. And with IAMCrossbar I will hopefully be able to set the properties programatically.
2006-05-01 13:53:21 UTC in DirectShow .NET
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I am trying to get a tv capture graph running with audio and video. I have gone through all of the capture samples but since they all have no audio I took another approach.
I connected graphedit to a graph with audio and video created by virtualdub to use as a reference when creating a graph of my own. However, when I create a replica of the virtualdub graph, either in graphedit or...
2006-05-01 12:36:02 UTC in DirectShow .NET
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It seems it wasn´t the PlayWnd application that was at fault. It was the DivX Settings Manager (unfortuately included in the latest DivX 6 package) that somehow blocked any keyboard input. I could bring up the DivX Menu Navigator (who really needs it???) from the Settings Manager (which loads into the taskbar) and then close it again, to bring back the keyboard functionality to PlayWnd. A...
2005-08-19 12:05:38 UTC in DirectShow .NET
