[MPlayer-dev-eng] [PATCH] synch to new x264 revision

[Jeff Clagg]

On Thu, Sep 23, 2004 at 02:32:42PM +0200, Guillaume POIRIER wrote:
> Based on your observations, here's a patch for manpage's x264 section.
> 
> I understand that it's maybe too soon to have them included in an
> "official" document, but it's still better than nothing.

First, I'm surprised by this. I figured this subject is for
DOCS/tech/encoding-tips.txt. But I like the fact that the x264 options are
(mostly) documented verbosely. Perhaps the main reason many people don't
use lavc is because they're confused about what the options do. Actually,
most people who DO use it are confused. Anyway, as long as we're on
the topic of the x264 documentation, a lot of the credit for it must go
to Loren Merritt. He pointed out several wrong things that were put in
there by Bernhard Rosenkraenzer and, later, by me. Plus, he provided a
lot of detail and explanation.

> Could you please review, and give feedbacks about the tips that I
> previously added to x264 section (e.g. fullinter and Anime material)?

I really have no idea if it's true or not. I have only one cartoon DVD
available, and it's not representative, since the picture is awfully
noisy and shaky (the original series is from the 1970's). I have done
nearly nothing in the way of systematic testing. I do recall one case
in which fullinter was found to reduce PSNR, and it was on animation
source. However, this was on an older version of x264 and I have reason
to believe it may be different now.

Most of the time I've spent doing anything resembling serious testing,
it's been with a certain clip from the movie The Matrix. Specifically,
a 216-second long clip that begins at the start of chapter 9. I did some
tests with fullinter and never managed to pin down a difference either
in PSNR or subjective quality.

If you want to see my favorite result so far, check the ftp incoming
directory, matrix_c9_h264.avi (I'm a little uneasy giving out links to
dvd rips on a publicly archived mailing list).