// Oprogramowanie Roman Ryltsov
I wrote a few posts on hardware H.264 encoding (e.g. this and the latest one Applying Hardsubs to H.264 Video with GPU). A blog reader asked a question regarding availability of the mentioned Intel Quick Sync Video support with low end Intel x5-Z8300 CPU. […] Intel has advertised that the Cherry Trail CPUs support H264…
Some recent update in Media Foundation platform introduced a new bug related to fragmented MP4 files and H.264 video. The bug shows up consistently with file versions: mfplat.dll – 10.0.14393.351 (rs1_release_inmarket.161014-1755)Â Â Â 15-Oct-16 05:48 mfmp4srcsnk.dll – 10.0.14393.351 (rs1_release_inmarket.161014-1755)Â Â Â 15-Oct-16 05:45 The nature of the problem is that MPEG-4 File Source is incorrectly time stamping the data:…
Video adapters currently offer a range of services which enables transcoding of H.264 content with certain modifications (including but not limited to flexible overlays, scaling, mirroring, effects and filters) end-to end on GPU keeping data as DirectX Graphics Infrastructure resource at all processing stages. Such specialized processing capabilities are pretty powerful compared to traditional CPU…
Virtual DirectShow sources have been a long time synonym of software-only camera implementation exposed to applications along with physical cameras in a way that applications consume the sources without making a difference whether the camera is real or virtual. Vivek’s template was a starting point for many: Capture Source Filter filter (version 0.1) 86 KB…
I already wrote earlier on 32/64-bit issues with Visual Studio. The problems are not frequent but when they happen they are pretty confusing. Here is another one today. C++ code is simple: #import “libid:59941706-0000-1111-2222-7EE5C88402D2” raw_interfaces_only no_namespace CComPtr<IObject> pObject; ATLENSURE_SUCCEEDED(pObject.CoCreateInstance(__uuidof(Object))); BYTE* pnData; ATLENSURE_SUCCEEDED(pObject->Method((ULONG_PTR) (BYTE*) pnData)); A COM method returns a pointer to data – pretty straightforward,…
False assertion failure in DirectShow BaseClasses transip.cpp, in CTransInPlaceFilter::Copy: ASSERT(lDestSize >= lSourceSize && lDestSize >= lDataLength); […] CopyMemory((PVOID) pDestBuffer, (PVOID) pSourceBuffer, lDataLength); The code asserts on “lDestSize >= lSourceSize” which is true in most cases, but it does not have or need to be true. The code below copies just lDataLength bytes and assertion on…
The application takes advantage of three powerful Windows APIs at a time: Desktop Duplication API Media Foundation Hardware H.264 Video Encoders MediaFoundationDesktopRecorder initializes a desktop duplication session and sends obtained desktop images to H.264 video encoder producing a standard MP4 recording. Optionally, it can add an audio track capturing data from one of the standard…