// Software Production Line
Some version of Microsoft Windows OS have rather dangerous subsystem known as MP4 property sheet handler (“MF MPEG-4 Property Handler” to be exact). Programmatically, you would use API like SHGetPropertyStoreFromParsingName and use IPropertyStore from there to read (reading is OK) and update/write certain MP4 file properties like, for example, a comment or som other metadata.…
Ostatnio spedzilem dosc duzo czasu na sprawdzaniu problemu z nieoczekiwanie slaba wydajnoscia w… Oh wait I am writing in English here. So, recently I spent rather a lot of time checking a problem with unexpectedly poor performance in a legacy DirectShow real-time video encoding pipeline based on NVIDIA GPU hardware encoding. There was also a…
Just a quick hookup of my test Media Foundation media source into new Windows 11 MFCreateVirtualCamera API. Software video source is presented by Windows 11 as a video capture device. Finally, there is a nice way to create virtual cameras, even though Windows 11 (Windows Build 22000) is a minimal requirement. Application produced video stream…
I am replaying a pretty much regular MPEG TS recording taken from air, just with a MPEG TS rollover condition inside. Microsoft Media Foundation – ? FAIL Microsoft Movies & TV Application – ? FAIL (obviously because of #1 above, but let me double this down) Media Player Classic MPC-HC – ? FAIL VLC –…
I pushed a few commits to my fork of DirectShow Win7 Samples (BaseClasses library specifically). One of small problems I happened to deal with is that a filter built with current/recent toolset produces code incompatible with legacy operating systems, which are still widely present in the wild. This could be solved by using outdated versions…
Introducing another popular DirectShow project: Vivek’s source filter which emulates a video capture device. For a long time the code was hosted on P “The March Hare” W’s website, which was eventually taken down. I placed the recovered project, binaries, README and upgrade to Visual Studio 2019 on GitHub: roman380/tmhare.mvps.org-vcam: Original Vivek’s popular sample project…
Over 20+ years there have been a steady flow of questions “how to build these projects”. Back in time the problem was more about having exactly matching settings in the application/library projects and mandatory dependent static library. At some point Microsoft abandoned the samples, then removed from the SDK completely. Luckily, some point the samples…