[Ffmpeg-devel] [PATCH] increase max numbers of B frames

[Erik Slagter]

On Tue, 2006-02-21 at 13:44 +0100, skal wrote:

>    Maybe this point is worth some details: h264 permits use the middle
>    B-slice as reference, making the reference anchors not so far from
>    the remaining inbetween b-slices (non-refs). So, you're back to 
>    deciding PbBbP over PbPbP for the refs, which is quite similar to
>    the PBP vs. PPP decision, as far as refs placement is concerned.
>    Well, this is quite an uncharted (and slippery) land, but some
>    are advocating use of GOPs as big as 32 (!):

What is the suggested (default) gop size for h264 anyway? I was under
the impression something like 250 was sort of optimal for (old style)
mpeg4.
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