// Oprogramowanie Roman Ryltsov
It looks like as primitive call as IMFPresentationClock::GetCorrelatedTime can deadlock entire pipeline due to an issue in Media Foundation core. There are no symbols available for mfcore.dll so I would assume they have a global critical section there which is inaccurately used. In any event the problem looks like an API bug, and severe one…
Another problem (bug) with Microsoft Media Foundation MPEG-4 Media Source H.265/HEVC handler is that it ignores conformance_window_flagflag and values from H.265’s seq_parameter_set_rbsp (see H.265 spec, F.7.3.2.2.1 General sequence parameter set RBSP syntax). The problem might or might not be limited to fragmented MP4 variants. It is overall questionable whether it has been a good idea…
MPEG-4 Media Foundation Source stubbornly keeps marking a second video sample with a MFSampleExtension_CleanPoint flag even though nothing suggests that the video frame is an IDR frame. The actual video frame is a P frame both in terms of MP4 box formatting and contained NAL units (the video is in fact an “infinite GOP” flavor…
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…
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…
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…
It might be an “old†version of Intel Media SDK runtime but still it is expected that software is running fine in older environments as well. MFXVideoVPP_Reset API is available since SDK API 1.0, there is nothing new with it. In certain scenario I use the API to change resolution of the processed video and…