832143 - Windows Media Foundation backend should implement skip to next keyframe

Status: RESOLVED WONTFIX

(Core :: Audio/Video, defect)

Description

[Chris Pearce [:cpearce (Not reading bugmail)]]

WMFReader::DecodeVideoFrame doesn't do anything if its aKeyframeSkip parameter is true, it should do something sensible.

I think we can use the thinning mode on IMFRateControl interface to achieve skip-to-next-keyframe.

Comment 1

[Chris Pearce [:cpearce (Not reading bugmail)]]

Note to self: I also may be able to use the IMFQualityAdvise interface to either reduce the quality, or drop frames directly using that interface. IMFQualityAdvise is exposed by the H.264 decoder.
http://msdn.microsoft.com/en-us/library/windows/desktop/ms695241%28v=vs.85%29.aspx

Comment 2

[Chris Pearce [:cpearce (Not reading bugmail)]]

We don't need to do this; we're shipping the MP4Reader on Windows, which does skip-to-next-keyframe properly.