VP6 decoder SDK

Is On2/Google VP8 decoder, backward compatible with VP6? Or can VP6 video stream be decoder using VP8 decoder? Also is their and SDK for VP6 decodin ...

How to encode series of images into VP8 using WebM VP8 Encoder API? (C/C++)

How to transcode RGB images into VP8 frames (Keyframe + some dependent frames)? So I created some images how to turn tham into VP8 now? ...