[FFmpeg-user] File sizes for full search, epzs, and other motion estimation algorithms

[Michael Niedermayer]

On Wed, Feb 20, 2013 at 04:07:39PM +0900, 문준형 wrote:
> I measured file sizes after encoding with H.263 codec, changing motion estimation algorithms
> 
> I fixed quantization value 10, GOP size 10 in my experiments.
> 
> 
> Followings are commands that I used
> 
> 
> full search
> 
> : ffmpeg -s qcif -i foreman_qcif.yuv -vcodec h263 -g 10 -q 10 -dia_size 1285 -qmin 10 -qmax 10 full_foreman_dia1285.avi
> 
> epzs
> 
> : ffmpeg -s qcif -i foreman_qcif.yuv -vcodec h263 -g 10 -q 10 -qmin 10 -qmax 10 epzs_foreman.avi
> 
> 
> As I know, encoding with full search takes the longest time but has the smallest file size.
> 
> However, encoding with epzs takes shorter time than encoding with full search
> 
> and encoded file size with epzs is smaller than encoded file size with full search.
> 
> Also psnr with epzs is almost same as psnr with full search.
> 
> 
> Please let me know anything about this result....

Yes, EPZS is better

[...]

-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Good people do not need laws to tell them to act responsibly, while bad
people will find a way around the laws. -- Plato
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