Commits
Pengchong Jin committed 5daef90efc4
skip un-neccessary motion search in the first pass This patch allows the encoder to skip the un-neccessary motion search in the first pass. It calculates the error of the zero motion vector using the last source frame as reference and skips the further motion search in the first pass if the error is small. The encoding speedup of the first pass for slideshow videos is over 30%. Borg test shows the overall PSNR performance remain approximately the same (derf -0.009, hd 0.387, yt 0.021, stdhd 0.065). Individual clips may have either PSNR gain or loss. The worst PSNR perfomance is from yt set, with a PSNR loss of -1.1. Change-Id: I08b2ab110b695e4689573b2567fa531b6457616e