[x264-devel] VBR

[Jason Garrett-Glaser]

On Thu, Sep 3, 2009 at 1:01 PM, aviad rozenhek<aviadr1 at gmail.com> wrote:
>> on a related note, since we're encoding in realtime, and using 1pass ABR
>>
>> > mode, I thought of developing a low-latency 2pass mode
>> > i.e. do the second pass with a 10 second delay to the first pass.
>>
>> Impossible under x264's current design.
>
> how about if I run two instances of x264 encoder, (one for 1st and one for
> 2nd pass) and "trick" the 2nd encoder into thinking that the entire "movie"
> is just a single GOP
> that way, as soon as the 1st encoder closes a GOP, I can feed it to the 2nd
> encoder, giving it a stats file that contains only that GOP.
> wouldn't that work?

No, because 2-pass acts over the whole video, not just a GOP.  What
you're describing would give significantly worse results than the
existing lookahead.

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