基于H.264的视频转码实现与优化

Encoding with H.264/AVC standard can get smaller file, occupy less bandwidth and it will become the mainstream in the cell phone videos gradually. Researching H.264/AVC standard and video transcoding have very realistic meaning and demand.This paper studies the IDR frame mechanism in video transcoding technology, analyses UMHS fast searching algorithm, introduces new searching steps and judgment of threshold.Compare several IDR frame mechanism of transcoding, in order to find a suitable mechanism，and put forward a quickly search optimization algorithm of UMHS.Experimental data proof that this new algorithm shortens the ME time,while SNR value descends unconspicuously.The above mentioned two optimizations realized in transcoding system performance and improve transcoding system performance.