// Oprogramowanie Roman Ryltsov
Given a DirectShow filter graph, what media samples are being sent through particular graph point? DumpMediaSamples utility gives a fast answer to this question. It prints out connection media type details (with details of VIDEOINFOHEADER, VIDEOINFOHEADER2 and WAVEFORMATEX structures corresponding to FORMAT_VideoInfo, FORMAT_VideoInfo2 and FORMAT_WaveFormatEx format types) and IMediaSample details obtained through AM_SAMPLE2_PROPERTIES structure. First…
See beginning in microsoft.public.win32.programmer.directx.video newsgroup. This sample is demonstrating COM aggregation to embed an existing filter an re-expose it as a new filter having inner filter pre-initialized. The Visual Studio C++.NET 2008 projects contains a DirectShow filter class that registers itself under Video Capture Sources category and embeds File Source (Async) Filter inside initialized to…
Previously on the topic: Part 1: Starting the Project Part 2: Video Processing Part 3: Persistence, Automation and Property Pages Part 4: Merit Due to the nature of the brightness and constract correction processing, it would make sense to combine and simplify processing to apply correction “in-place”, that is without copying data from input to…
Previously on the topic: Part 1: Starting the Project Part 2: Video Processing Part 3: Persistence, Automation and Property Pages The implemented so far filter/DMO shown a problem related to its unexpectedly high “importance” in the system with the symptom of “auto-insertion” the filter when it is not necessary. For example, let us render an…
This seems to be undocumented (Google does not know anything on this): ATL server executables may be run with /RegServerPerUser and /UnregServerPerUser switches to hopefully (this what would expect this to do without checking) register contained COM classes under HKEY_CURRENT_USER rather than HKEY_LOCAL_MACHINE and thus allow COM server run under credentials of non-administrative user. See…
Previously on the topic: Part 1: Starting the Project Part 2: Video Processing The principal task of video processing is done but there are still things mandatory for the filter to be usable. First of all, a custom interface is required to be able to control the filter from higher level application and to adjust…
Previously on the topic: Part 1: Starting the Project We have the DMO filter project compilable and registered with the system and it is right time to start putting code in that allows connecting the filter to other DirectShow filters, such as video capture or video file source on the input and video renderer on…