[XviD-devel] Documentation of XviD options in mencoder

[Edouard Gomez]

Selon Christoph Lampert <chl at math.uni-bonn.de>:
> for "gmc", it's misleading to call them "Sprite Frames", although
> technically they might be. But Sprites are a feature of Main Profile only,
> and these are either "GMC-frames", "S(GMC)-VOPs" or just don't call them
> anything.
>
> for "reduced" you might warn that the bitstream created is outside any
> MPEG-4 profile, and it most likely won't be decoded by anything else than
> XviD (does libavcodec support reduced resolution?).

I'm even in favor of simply removing this option, it doesn't fit in any
plans we have for XviD...

> "mod_quant" isn't legal MPEG-4, though it usually works.

Damn still there ?! i asked the module maintainers to remove it, i think i
even sent them the patch warning them about MPEG4 compliancy problems. I'll
ask iive to sponsor another patch for this issue, mod_quant should not be
available at all

> for max_bframes>1, qpel and gmc you can warn that using those, though
> being perfectly legal MPEG-4, are not compatible to the "DivX Home
> Theater" profile, so the resulting bitstream might not be playable with
> (older) MPEG-4 standalone devices.
>
> Of course, similar restriction apply to lavcodec's mpeg4, so maybe a
> separate section on MPEG-4 + hardware-compatability would be useful.

Good idea.

--
Edouard Gomez