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

[Rolf Ernst]

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
> https://lists.mplayerhq.hu/mailman/listinfo/mplayer-users


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