[MPlayer-users] After updating - Faster encode, lower quality

[Rolf Ernst]

On Thu, Feb 25, 2010 at 10:20 AM, Rolf Ernst <rolf.ernst at silverlightning.org
> wrote:

> On Thu, Feb 25, 2010 at 10:01 AM, Krzysztof Duchnowski <amidk75 at gmail.com>wrote:
>
>> andrew at WARnux.com pisze:
>>
>>> I've been using x264 to encode videos now for months.  Encoding a full
>>> length movie used to take about 11 hrs and the quality was splendid.  I
>>> built the latest mplayer/mencoder and x264 a few days ago and now my
>>> encodes only take about 4 hours but the quality is degraded.  What really
>>> confuses me is that I didn't change my command line parameters at all.
>>>
>>> How is this possible?
>>>
>>
>> Did you used CRF mode?
>> If yes then for month now (or two) CRF mode not reflect QP anymore but
>> instead it is a "Quality factor" and thus considerable good quality you
>> could achieve is with CRF in 18-21 range.
>>
>> --
>> Krzysztof 'DK75' Duchnowski
>> GetFirefox - http://www.mozilla.com/firefox/
>> Konfiguracja UTF-8 dla czytników - http://evil.pl/pip/utf/
>> _______________________________________________
>> MPlayer-users mailing list
>> MPlayer-users at mplayerhq.hu
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>
>
> 18-21 gives you rather large files. I use 23 (last month's build) and get
> incredibly good quality. For 720x480 resolution it often comes across
> somewhere in the 1800kbps range. But it depends.
>
> /re
>
I should add that I use pyramid, adaptive frame, 6 ref rames, 5 b
frames,CABAC (of course) and what not, pretty much maxing out whatever I can
do to lower the bit rate.