// Oprogramowanie Roman Ryltsov
Previous post embedded a video clip, hosted by YouTube, with a 37 seconds recording of Microsoft Edge window playing another YouTube clip. The video clearly showed UI part of browser and YouTube web page besides the video. Audio was a re-encoded re-capture of playback audio, however obviously matching algorithm would do a positive here because…
I am sometimes using a rework of earlier DxgiTakeSnapshot application for one specific purpose mentioned below. In addition to Desktop Duplication API, recent version of Windows offer a similar (in sense of acquisition of external video content) API: Windows.Graphics.Capture (hereinafter “WGC”), and the new rework is using this API to capture visual content as a…
There is a new API coming with Windows 11. Finally we will get well defined way to register virtual cameras (perhaps for applications built against Windows Media Foundation API, not DirectShow): MFCreateVirtualCamera. Creates a virtual camera object which can be used by the caller to register, unregister, or remove the virtual camera from the system.…
One more video streaming scenario is added to PoC StreamingServer application: ability to stream DRM-enabled content with playback via Media Source Extensions (MSE) and Encrypted Media Extensions EME interface and by-frame data appendage in JavaScript. DRM scenarios are typically handled by JavaScript streaming media players such as castLabs PRESTOplay for Web Apps, where JavaScript player gets…
One another small addition to StreamingServer showcase/development application: verification for WebCodecs API video streaming. WebCodecs API offers browser applications video decoding capabilities: The WebCodecs API gives web developers low-level access to the individual frames of a video stream and chunks of audio. It is useful for web applications that require full control over the way…
Just a small addition to MPEG-DASH server: a separate trick play video track with 1 fps just IDR frames track. The “trick mode” itself is essentially this: 3.2.9. Trick Mode Support Trick Modes are used by DASH clients in order to support fast forward, seek, rewind and other operations in which typically the media, especially…
MPEG-DASH is ISO/IEC 23009 “Dynamic Adaptive Streaming over HTTP” specification. This is widely used to stream audiovisual content over internet opposed to playback of static content such as downloaded clip. The StreamingServer application I published some time ago generated test content using HTTP Live Streaming protocol, which is, well, similar. So I extended StreamingServer a…