Directshow samples

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Directshow samples

The purpose of this library is to allow access to Microsoft's DirectShow functionality from within. NET applications. This library supports both Visual Basic.

NET and Cand theoretically, should work with any. NET language. Microsoft's managed solution to allowing access to DirectShow from. For developers who want the complete range of functionality of DirectShow in.

NET, this library provides the enums, structs, and interface definitions to access them. Reviewing the source code will show that there is very little executable code in this library. There are a few helper functions mostly in DsUtils. See ReadMe. There are a number of samples included to show how to perform various common tasks. Note that these samples should not be considered commercial quality, but can form the basis of your own code.

DxLogo — A sample application showing how to superimpose a logo on a data stream. It uses a capture device for the video source, and outputs the result to a file. Other than the tediousness of converting C to VB, this was a trivial exercise.

DxPropPages — Show how to add compression filters to video capture, and show how to invoke the property pages for capture devices, and video compressors. This application creates a preview window for the first video capture device that it locates on the user's system if any.

There is a help file IMediaObjectImpl. A help file DESCombine. DxScan — A sample application scanning a media file looking for black frames. You can adapt this sample for your uses if some filters are known to break your application.

DxWebCam — A poor man's web cam program. This application runs as a Win32 Service. If you have samples for example video frames from bitmap files that you want to use as a source in a graph, this filter will show you how.

directshow samples

DxText — A sample application showing how to superimpose text strings on a datastream. The stream is read from an avi file.

PlayWnd is a simple media player application with a minimal user interface. DvrMsCutter — This sample extracts a segment of a dvr-ms file into another dvr-ms file.

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DvrMsCutter2 — This sample extracts multiple segments of a dvr-ms file into another dvr-ms file. These interfaces are in the source code, but have not been tested. These interfaces are in the source code, but are deprecated, undocumented, intended for Ole Automation or otherwise untestable which means they are not, and will not be tested:.

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Toolkit — A collection of useful utilities.For instructions on how to build the samples, refer to the documentation provided in the Windows SDK. Some of the samples link to the DirectShow base class library. To build these samples, you must first build the base class library. For more information, see DirectShow Base Classes.

The base class library is required for all of the sample filters. If you copy a sample folder to another directory, make sure to copy the Common folder as well. Setting Up the Build Environment. Skip to main content. Contents Exit focus mode.

If there is additional documentation for a sample, the first column of this table links to it. AmCap Sample Capture Video capture application. PlayCap Sample Capture Simple capture application.

This sample demonstrates dynamic graph building. CutScene Sample Playback Plays a video file in full-screen mode. Note] Requires Windows Vista or later. Additional Dependencies Some of the samples link to the DirectShow base class library.

Yes No. Any additional feedback? Skip Submit. Is this page helpful? Demonstrates basic DVD playback and navigation, plus advanced features such as parental level management, bookmarks, karaoke, and command synchronization. Sample implementation of the Infinite Pin Tee filter. Push Source Filters Sample.

Source filters that provide the following data as a video stream: A single bitmap, a set of bitmaps, a copy of the current desktop image.

Shows how to use the Filter Mapper to find filters in the registry. Demonstrates using the System Device Enumerator to enumerate devices and filters.You seem to have CSS turned off. Please don't fill out this field. NET c directshow lib, capture and playback using c and directshow.

NET Web Site. Was a little complicated to figure out initially, but all of the samples helped out tremendously.

directshow samples

I used this to create a control that could be added from the Toolbox for a live video feed. Please provide the ad click URL, if possible:. Oh no! Some styles failed to load. Help Create Join Login. Operations Management. IT Management. Project Management. Resources Blog Articles Deals. Menu Help Create Join Login.

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Pure .NET DirectShow Filters in C#

JavaScript is required for this form. No, thanks. Project Activity. Follow DirectShow. NET DirectShow. Etcher is a powerful OS image flasher. It protects a user from accidentally overwriting hard-drives by making drive selection obvious; and with validated flashing there is no more writing images to corrupted drives.

It is also called balenaEtcher since it is developed by balena. In addition, Etcher can flash directly Raspberry Pi devices that support usbboot.

Use for. Learn More. User Ratings 5. User Reviews Filter Reviews: All. Great library with great the samples. Great stuff. NET Report inappropriate content.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. After some looking around I found out that DirectShow has much more exmples and even here on Stackoverflow it gets recommended over MMF. So I want to get started with some examples and for this I need strmbase. But getting the samples seems freaking impossible on Windows 8. According to this page it should be a part of Windows 8 SDK, but this is fully installed and no folder by the name of baseclass exists anywhere on my computer.

It is also part of Windows 7 sdk, but this refuses to install. Learn more. Asked 7 years, 1 month ago. Active 3 years, 10 months ago. Viewed 7k times.

directshow samples

How do I install the DirectShow samples on Windows 8? Cheiron Cheiron 3, 4 4 gold badges 24 24 silver badges 49 49 bronze badges. Before that, they were on extras and it dates back to although, the samples has minimal changes since then. If you have hard time getting them in Windows 8 now, maybe you can install Windows SDK onto virtual [older] system and then just copy from there.

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Aug 31 '13 at Active Oldest Votes. Chad 71 1 1 silver badge 10 10 bronze badges. Thanks for this. No other way I found online worked. Just trying the standard windows 7 sdk installer non-iso resulted in errors even if I just picked to install samples, so the link to the ISO is priceless. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name.

directshow samples

Email Required, but never shown. The Overflow Blog. Podcast Ben answers his first question on Stack Overflow. The Overflow Bugs vs. Featured on Meta. Responding to the Lavender Letter and commitments moving forward. Linked Related 0. Hot Network Questions. Question feed. Stack Overflow works best with JavaScript enabled.Filters deliver data across pin connections. Data moves from the output pin of one filter to the input pin of another filter.

The most common way for the output pin to deliver the data is by calling the IMemInputPin::Receive method on the input, although a few other mechanisms exist as well. Depending on the filter, memory for the media data can be allocated in various ways: on the heap, in a DirectDraw surface, using shared GDI memory, or using some other allocation mechanism. The object responsible for allocating the memory is called an allocatorwhich is a COM object that exposes the IMemAllocator interface.

When two pins connect, one of the pins must provide an allocator. DirectShow defines a sequence of method calls that is used to establish which pin provides the allocator. The pins also agree on the number of buffers that the allocator will create, and the size of the buffers.

Before streaming begins, the allocator creates a pool of buffers. During streaming, the upstream filter fills buffers with data and delivers them to the downstream filter.

But the upstream filter does not give the downstream filter raw pointers to the buffers. Instead, it uses COM objects called media sampleswhich the allocator creates to manage the buffers. Media samples expose the IMediaSample interface. A media sample contains:. The time stamp defines the presentation time, which the renderer filter uses to schedule rendering. The flags indicate things like whether there was a break in the data since the previous sample.

The media type provides a way for filters to change formats mid-stream. Usually, the sample has no media type, which indicates that the format has not changed since the previous sample. While a filter is using a buffer, it holds reference count on the sample. The allocator uses the reference count to determine when it can re-use the buffer. This prevents a filter from overwriting a buffer that another filter is still using. A sample does not return to the allocator's pool of available samples until every filter has released it.

The Filter Graph and Its Components. Skip to main content. Contents Exit focus mode. A media sample contains: a pointer to the underlying buffer a time stamp various flags optionally, a media type The time stamp defines the presentation time, which the renderer filter uses to schedule rendering.

For more information, see the following topics: The topic Samples and Allocators provides a more detailed description of how allocators work. Yes No. Any additional feedback? Skip Submit. Is this page helpful?In this post I describe how to make DirectShow filters in pure C. I made the BaseClasses library also in pure C and a few samples to show you how easily it can be used.

I think beginner multimedia developers can use my library, but for extending it, you should have knowledge of COM, marshaling, and threading.

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I suggest you check my previous posts as I will not repeat major things described in there. The source code of filters consist two projects: BaseClasses and ExampleFilters. The BaseClasses library consists of these classes:. Base classes also use some stuff in my class library and COM helper objects.

AmCap Sample

Those objects are partially described in my previous posts. Write and throwing exceptions - why not is described in the previous article. Plus I suggest reading my description regarding threading in my previous post just don't want to repeat it here. My implementation has similar methods as Microsoft native, so I'll describe only the differences. OK, if you are following all that aspects let's start reviewing. The filter registering process is similar to a.

The filter DLL should be signed. You can embed the type library as an unmanaged resource in the DLL but that's not mandatory. In sample filters the registration is performed automatically, see the install. You can specify the registration in the project settings but that may not work. I made the filter registration very simple.

For that there is a class attribute with different constructors:. That attribute should be specified to the class which should be registered as a DirectShow filter. In attribute you can specify filter name filter merit and filter category.

If name not specified then will be used name which is specified in a filter class. How performed registering and un-registering you can see in following routines of the BaseFilter class. Another difference from native BaseClasses is pin access. Along with pins initialization you can dynamically manipulation of the pins by next helper routines:. To make your own filter just inherit it from any base filter class specify required attributes and add functionality.

In some cases may require to perform custom registration of the filters along with or without base registration. For this purpose have been added few methods. And in AfterInstall method free that allocated memory.

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In case if BeforeInstall returns failure - filter does not register and AfterInstall not called.Any substantial amendment to the BetBull Rules shall be notified in advance by BetBull to the Account Holder, before coming into effect and will require your consent.

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