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Dump Filter Sample

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[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

Description

The Dump Filter is a renderer filter that writes the media samples it receives to a text file.

This sample illustrates how to use the base filter class CBaseFilter and the rendered input pin class CRenderedInputPin. It also demonstrates how to implement the IFileSinkFilter interface. The Dump filter has a single input pin, which writes every sample that it receives directly to a file.

Usage

This filter is a useful debugging tool. For example, you can verify, bit by bit, the results of a transform filter. You can build a graph manually by using GraphEdit, and connect the Dump filter to the output of a transform filter or any other output pin. You can also connect a tee filter and put the Dump filter on one leg of the tee filter and the typical output on another leg to monitor the results in a real-time scenario.

Downloading the Sample

To download the DirectShow SDK samples, install the latest version of the Windows SDK.

This sample is installed under the following path: [SDK Root]\Samples\Multimedia\DirectShow\Filters\Dump.

DirectShow Samples