[MPlayer-cvslog] CVS: main/libmpcodecs vd_ffmpeg.c,1.154,1.155

[Guillaume POIRIER]

Hi,

On 1/2/06, Diego Biurrun <diego at biurrun.de> wrote:
> On Sun, Dec 18, 2005 at 02:22:13AM +0100, Michael Niedermayer CVS wrote:
> >
> > Modified Files:
> >       vd_ffmpeg.c
> > Log Message:
> > bitexact flag
>
> Could one of the MEncoder documentation maintainers add this to the man
> page, please? :)

/me looks around to see which crowd of people this request is
directed. This flag is actually for decoding, so it's more an MPlayer
flag. Nonetheless, here is the description of that flag that I found:
 Only use bit exact algorithms (for codec testing).
 If I'm right or wrong (particularily, does this flag applies to all
steps of the decoding, or just the IDCT), please say so.

For what it's worth, here's what the encoding counterpart of bitexact
looks like:

.B bit_exact
Use only bit exact algorithms (except (I)DCT).
Additionally bit_exact disables several optimizations and thus
should only be used for regression tests, which need binary
identical files even if the encoder version changes.
This also suppresses the user_data header in MPEG-4 streams.
Do not use this option unless you know exactly what you are doing.

Guillaume

--
Life is pleasant. Death is peaceful. It's the transition that's troublesome.
    Isaac Asimov (1920 - 1992)

MPlayer's doc is offline. Find some fresh one here:
http://tuxrip.free.fr//MPlayer-DOCS-HTML/en/
http://tuxrip.free.fr//MPlayer-DOCS-HTML/fr/