Re: [MEncoder-users] divx v's x264

On 6/5/08, RC <cooleyr@gmail.com> wrote:
> On Wed, 4 Jun 2008 21:05:33 +1000
> Alex Samad <alex@samad.com.au> wrote:
>
>> > Also, doing postprocessing before encoding is basically always
>> > nonsense.
>> could you explain please
>
> Postprocessing adds noise (blur) to the video to mask blocking. That,
> however, makes it harder for the next codec to compress, and assuming a
> limited bitrate (which you're using), will make blocking in the encoded
> file worse.

Postprocessing removes noise (one of the stages is called dering).
Blurring generally makes compression easier because it removes
hi-frequency coefficients (aka fine details).

btw. it is highly recommended to use cabac with x264. It gives
significant difference at hi bitrates.
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