[MPlayer-DOCS] encoding-guide: outdated description of x264enc options?
poirierg at gmail.com
Sat Jan 6 20:02:03 CET 2007
On 1/6/07, Andrew Savchenko <Bircoph at list.ru> wrote:
> It seems that description of x264 encoding options is slightly
> outdated. Into paragraph "Options which primarily affect speed and
> quality" in description of the subq opion anyone can see:
> subq=6 is the slowest, highest quality mode.
> But in the manual:
> 6 Enables rate-distortion optimization of macroblock types in
> I- and P-frames.
> 7 Enables rate-distortion optimization of motion vectors and
> intra modes. (best)
> So, subq=7 seems to be the highest quality mode. Probably it sould
> be describded instead of subq=6. Or its quality gain is negligible
> in comparision with speed loss and it is considered as
>From my experience, subq=7 can improve PSNR between 0,01dB and 0,02dB,
and slows down encoding by about 33% compared to subq=6.
Because this introduces a significant slowdown without a significant
improvement in quality, I wouldn't recommend using it unless you're
after every bit of quality improvement.
Andrew do you plan to update this section, or would you prefer let me do it?
An association of men who will not quarrel with one another is a thing
which has never yet existed, from the greatest confederacy of nations
down to a town meeting or a vestry.
-- Thomas Jefferson
(when interviewed about MPlayer ML flamewars)
More information about the MPlayer-DOCS