[MEncoder-users] crf, qp, pass params (was - how do u set H264 video ID?)

[Grozdan]

On Tue, Jun 29, 2010 at 9:56 PM, Goga777 <goga777 at bk.ru> wrote:
>> > - qp is really meant to be used if you know what you do, if you need
>> > to us lossless mode, or if you really want to _force_ low quants.
>>
>> crf=0 is also lossless, so qp is virtually useless for regular users ;)
>>
>> >
>> > My ranking (in decreasing order of quality):
>> > 2-pass>crf>qp
>>
>> My ranking, crf -> 2-pass -> qp
>>
>> >
>> > In terms of speed:
>> > crf,qp>2-pass.
>
> is there any sense to play with such parameters as
>
> me
> subq=6-9
> trellis
> partitions=all
> 8x8dct
> bframes
> frameref
> b_pyramid
> weight_b
>
>
> with crf parameter ?
>
> Or is it enough to keep those parameters by default and to play with crf only ?

Of course there is. These affect decision, motion estimation, motion
refinements, partitions, type of frames, etc which all contribute to
and affect the amount of compression. CRF is just a bitrate decision
allocator

>
> Goga
>
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