// Oprogramowanie Roman Ryltsov
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:…
A DirectShow developer complained on sudden failure of Core Audio IMMDevice::Activate call supposed to instantiate a DirectShow filter for a given device. The problem appeared to be related to installed DirectShowSpy and its interference with the API calls. The symptom was of the following kind: when Activate was called for different types of objects, the…
A really nasty problem coming from MainConcept AVC/H.264 SDK Encoder was destroying media streaming pipeline. SDK is somewhat old (9.7.9.5738) and the problem might be already fixed, or might be not. The problem is a good example of how a small bug could become a big pain. The problem was coming up in 64-bit Release…
There were a few reports that in Windows 10 it is unable to play AVI files, which played fine in earlier versions of Windows, AVI files specifically. Windows 10 DirectShow problem Windows 10 DirectShow problem with AVI OK, the problem does exist. More to say, the problem exist in Windows component that implements AVI Splitter…
As MSDN says, The PolyTextOut function draws several strings using the font and text colors currently selected in the specified device context. The article also mentions ExtTextOut as a simpler sister function: To draw a single string of text, the application should call the ExtTextOut function. It looks like the API is not so Unicode friendly. Code as simple as PolyTextOut(L”Мама мыла раму”); PolyTextOut(L”Mother…
To follow up previous post with Media Foundation bug, here goes another one related to property handler for MPEG-4 files (.MP4) and specific property PKEY_Video_FrameRate which reports frame rate for given media file. This is the object responsible for filling columns in explorer, or otherwise visually the bug might look like this: The values of the properties are…
Unfortunately, 64-bit version of Windows Media Video 9 Decoder is not as good as its 32-bit sister. 32-bit version is user an order of magnitude more frequently and does not give troubles, nevertheless 64-bit version offers similar feature set it is pretty hard to see it in action since it takes a 64-bit media application to host…