Category: Video

Video related stuff

Windows Media Player encountered a problem while playing ASF/WMV file with multiple audio tracks

This is not really obvious: Windows Media Player refuses to open a Windows Media (ASF) file with an undescriptive error message: “Windows Media Player encountered a problem while playing the file”. The problem, however, is that the file is actually good, more or less. The file plays well in DirectShow and Media Foundation APIs. There…

Read the full article

Media Foundation MPEG-4 Property Handler might report incorrect Video Frame Rate

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…

Read the full article

The case of incorrect behavior of stock DirectX Media Objects

Since Microsoft Windows Vista, Media Foundation API offers a set of convenient Digital Signal Processors for video and audio processing. These include conversion helpers for video and audio, dual interfaced as Media Foundation Transforms (MFTs) and DirectX Media Objects (DMOs). Earlier posts shed some light on DMO interfaces, and use of DMOs in DirectShow graphs…

Read the full article

DeckLinkCapabilities: A Printout of Capabilities of Blackmagic Design/DeckLink Hardware

The tool provides a user- (well, actually a developer-) friendly printout of capabilities accessible via Blackmagic Design DeckLink SDK for DeckLink series of hardware. This covers features of DeckLink and Intensity series of hardware for video/audio capture, accessible via vendor’s SDK. The data is printed out in Markdown format, easy to read on its own…

Read the full article