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Warren · 29th January 2007, 10:57

Hi guys, this is my first foray into AviSynth plugin writing and I've had some success after a little bit of a learning curve.

There is still no easy way to decode a VC-1 Elementary Stream into raw pictures without going through a long convoluted directshow chain of filters in AviSynth so I decided to make a VC1Source plugin, sort of like the MPEG2Source plugin from dgIndex.

Using some reference VC-1 decoder code that also parses the VC-1 Elementary Stream I now have a plugin that will decode pictures, albeit slowly (~4.5fps on a Core2Duo E6600). The problem i am having currently is to do with framerate, the VC-1 ES reports the FPS as 29.97 even though I know for a fact that the video is 24 FPS since it comes from a HD DVD. Now it does set a pulldown flag in one of the data structures, but I'm not sure exactly how that is supposed to work.

Does anyone have any ideas or comments?

29th January 2007, 10:57	#1 \| Link
Warren Registered User Join Date: Dec 2002 Posts: 68	VC1Source Plugin Hi guys, this is my first foray into AviSynth plugin writing and I've had some success after a little bit of a learning curve. There is still no easy way to decode a VC-1 Elementary Stream into raw pictures without going through a long convoluted directshow chain of filters in AviSynth so I decided to make a VC1Source plugin, sort of like the MPEG2Source plugin from dgIndex. Using some reference VC-1 decoder code that also parses the VC-1 Elementary Stream I now have a plugin that will decode pictures, albeit slowly (~4.5fps on a Core2Duo E6600). The problem i am having currently is to do with framerate, the VC-1 ES reports the FPS as 29.97 even though I know for a fact that the video is 24 FPS since it comes from a HD DVD. Now it does set a pulldown flag in one of the data structures, but I'm not sure exactly how that is supposed to work. Does anyone have any ideas or comments?