[x264-devel] aqp and bit rate if content is static

Jason Garrett-Glaser jason at x264.com
Thu Mar 29 19:01:57 CEST 2012


On Thu, Mar 29, 2012 at 9:31 AM, Johannes Ebersold
<johannes.ebersold at dfki.de> wrote:
> Hi,
>
> thanks for your answer and your great work on the x264 encoder :)
>
> I am short on time today, but may provide a sample tomorrow ...
>
> We did some testing today and dropped the idea of increasing quality by
> adjusting QPs, thus we now have a stream with normal CRF setting (23) and
> AQ.
>
> But our problem remains ... and maybe i should clarify my question somewhat:
> We put the same image into the encoder about  500 times in a row, might also
> be more or less, just to say a concrete and realistic number ;) The bit
> rate, after the first frame, should drop to (nearly) zero, even with intra
> refresh activated and started with the first of those 500 frames?
> Unfortunately this does not happen and the bit rate is on a constant (high)
> level.

Can you post an encoded output file?

Are you sure that intra refresh isn't running continuously, thus
continually using bits?  It runs every keyint frames.

Jason


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