// 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…
This continues the topic raised by previous post. As fairly noticed by The March Hare, video renderer is using hardware overlay and the benchmark is incorrect if we are to extrapolate the performance to scenario with multiple video renderers. So, an updated test application creates 16 video renderers with 16 threads pumping two meida samples…
Started here: How can I overlay timestamp on the image? on microsoft.public.win32.programmer.directx.video Let us see if RGB conversion adds any noticeable effect on streaming YUY2 video, typical output of video decompressor. As a reference I am taking a simple YUY2 source -> Video Mixing Render Filter (VMR) graph, where source filter streams the same pre-allocated…
I wonder what was the reason to change and basically disable well known behavior on multipart/x-mixed-replace MIME type with the release of FireFox 3? It never worked with Internet Explorer but it has been working with Mozilla Netscape through FireFox 2. Why the hell this was to be changed? GET /cgi-bin/zzz HTTP/1.1 Host: xxx:yyy User-Agent:…
What is this, a picture of a box or a piece of user interface? It keeps surprising that software vendors keep investing in creating custom user interfaces (GUI) for the sake of… just nice visual appearance? Yes, it is visually attractive, but in a daily usage this is only important factor from the very start.…
A customer complained that he was unable to get things working with Y-Cam Black camera. Naming models using colors is already a sign that problems are inevitable. The camera either had old firmware and implemented a different protocol (other than documented) or the documentation sucked but I would like to mention a different thing. I…
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…