Directshow Samplegrabber Audio

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Using the Sample Grabber - Win32 apps | Microsoft Docs

https://docs.microsoft.com/en-us/windows/win32/directshow/using-the-sample-grabber

The Sample Grabber filter is a transform filter that can be used to grab media samples from a stream as they pass through the filter graph. If you simply want to grab a bitmap from a video file, it is easier to use the Media Detector (MediaDet) object. See Grabbing a Poster Frame for details. The Sample Grabber is more flexible, however ...

Audio/Video synchronization issues using samplegrabber …

https://stackoverflow.com/questions/23275035/audio-video-synchronization-issues-using-samplegrabber-filter

I am using DirectShow for a movie playback. I modify video/audio data and render everything myself in my app. Therefore, I am using SampleGrabber filters and NULL renderers. The problem arises when I rewind the movie (using IMediaSeeking interface) - audio significantly lags behind the video (a few seconds lag).

c++ - Directshow audio capture filter generates only 1 ...

https://stackoverflow.com/questions/70237930/directshow-audio-capture-filter-generates-only-1-sample-per-second

Directshow "sample" is a term for buffer with data: When a pin delivers media data to another pin, it does not pass a direct pointer to the memory buffer. Instead, it delivers a pointer to a COM object that manages the memory. This object, called a media sample, exposes the IMediaSample interface. Then ... size should be 176400 bytes per sec.

Sample Grabber Filter (Qedit.h) - Win32 apps | Microsoft …

https://docs.microsoft.com/en-us/windows/win32/directshow/sample-grabber-filter

The Sample Grabber filter provides a way to retrieve samples as they pass through the filter graph. It is a transform filter with one input pin and one output pin. It passes all samples downstream unchanged, so you can insert it into a filter graph without altering the data stream. Your application can then retrieve individual samples from the ...

SampleGrabber: Audio samples spaced 0.5 seconds apart

https://social.msdn.microsoft.com/Forums/en-US/5d11ebda-fc4e-4675-b309-de9a31d4f96a/samplegrabber-audio-samples-spaced-05-seconds-apart

SampleGrabber: Audio samples spaced 0.5 seconds apart. Archived Forums > DirectShow Development. ... If I remember correctly, 500 ms is the default granularity for audio capture buffers/latency in DirectShow. You can change this via the IID_IAMBufferNegotiation interface of the output pin.

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