// Oprogramowanie Roman Ryltsov
DirectShow Video Mixing Renderer (VMR-7) filter exhibits a (regression?) bug in Windows 10 systems. When aspect ratio preservation is enabled in VMR_ARMODE_LETTER_BOX mode, which makes overall sense as default mode quote so often, the letterboxing does not work as expected. The problem is easy to reproduce with a well known DShowPlayerSDK sample application, with an…
Some time ago I shared an application which I have been using to embed git reference into binary resources, especially as a post-build event in automated manner: Embedding a Git reference at build time. This time I needed a small amendment related to use of a git repository as a sub-module of another repository. To…
The screenshot above shows Surface Pro tablet’s infrared camera (known as “Microsoft IR Camera Front” on the device) captured live, encoded and streamed (everything is hosted by Microsoft Media Foundation Media Session by this point) over network using WebSockets into Chrome’s HTML5 video tag by means of Media Source Extensions (MSE). Why? Because why not.…
It appears there is a sort of a limitation (read: “a bug”) in Media Foundation MPEG-4 File Source implementation when it comes to reading long fragmented MP4 files. When respective media source is used to read a file (for which, by the way, it does not offer seeking), the source issues a MF_SOURCE_READERF_ENDOFSTREAM before reaching…
It appears that re-initialization of encoding session with NVIDIA Video Codec SDK is or might be producing an unexpected memory leak. So, how does it work exactly? The root case problem is secondary nvEncInitializeEncoder call. Alright, it might be not exactly how API is designed to work, but returned statuses all indicate success, so it…
IMFTrackedSample interface is available/allowed in UWP applications. The interface is a useful one when one implements a pool of samples and needs a notification when certain instance can be recycled. Use this interface to determine whether it is safe to delete or re-use the buffer contained in a sample. One object assigns itself as the…
Some time ago I wrote about a bug in AMD’s H.264 Video Encoder MFT, where implementation fails to synchronize access to Direct3D 11 texture. So Intel’s implementation has exactly the same problem. Intel® Quick Sync Video H.264 Encoder MFT processes input textures/frames without acquiring synchroization and can lose actual content. It is pretty hard to reproduce…