VP8

The whole story began after the VP8 codec was opened by Google. Soon after its release, Jason Garrett-Glaser, a x264 and ffmpeg developer, came up with a highly extensive review of the codec. And in his technical review, he mentioned that the VP8 decoder is slow as compared to H.264, pointed out some of its weaknesses and also said that VP8 copies too much from H.264 for ease and because of this, the codec could be susceptible to patent issues.