[MEncoder-users] Enable mbtree

[Grozdan]

On Mon, Jan 25, 2010 at 10:27 PM, Баймуратов Г. М. <flibustier at gmail.com> wrote:
> Hardcoding bitrate is not so good me, I'm having batch encoding, so crf
> gives me more "viewable" quality.
> About bframes you are right, I'll cut it to 16.
> Thank you for advices and help. I'll certainly use them.

Why is it not good? If you want to target a specific file size, you
most definitely want to use a 2 or 3 pass, even in batch mode. With
crf, every file in batch mode will have a different file size, unless
all you files are exactly the same. Also, sometimes crf can "blow up"
bitrates on specific types of content (ie, one with lots of moving
small details, luminescent-like colors, lots of overall picture
complexity, noise, etc). Of course, the downside of this is that you
may need to specify a different bitrate for each file and this can be
a bit hard in batch mode

if you want to further increase quality, then increase the value of
rc_lookahead (used by mbtree and vbv ratecontrol) from 40 (default) to
something like 100 or so (it gets clipped to keyint value)

>
> On Tue, Jan 26, 2010 at 12:19 AM, Grozdan <neutrino8 at gmail.com> wrote:
>
>> On Mon, Jan 25, 2010 at 10:08 PM, Баймуратов Г. М. <flibustier at gmail.com>
>> wrote:
>> > Yes, I've enough time for encoding and I need the highest quality at
>> lowest
>> > file size
>>
>> If you want small file sizes, why do you use an encoding mode which is
>> hard to predict what file size it'll produce? Go for 2 or 3 pass
>> encoding. With CRF you can't predict easily what your final file size
>> will be
>>
>> Also, your bframes=32 will be clipped to 16 internally as 16 is the
>> maximum. Furthermore, it's doubtful that the encoder will use all 16
>> bframes with b-adapt=2 (unless you're encoding anime), so you're just
>> wasting time/cycles for no good reason. Also TESA is placebo, you
>> won't be able to spot any difference between UMH and TESA, not unless
>> you use a magnifying glass or have alien eyes :)
>>
>> >
>> > Do I need to add :mbtree: to parameters?
>> >
>> >
>> > On Tue, Jan 26, 2010 at 12:06 AM, Grozdan <neutrino8 at gmail.com> wrote:
>> >
>> >> On Mon, Jan 25, 2010 at 10:00 PM, Баймуратов Г. М. <
>> flibustier at gmail.com>
>> >> wrote:
>> >> > How could I know if mbtree is enabled?
>> >> >
>> >> > Forum on doom9 says that there should be stats.mbtree in folder, where
>> >> file
>> >> > is encoding, but I don't see it
>> >> >
>> >> > These are x264 encoding options
>> >> > -x264encopts
>> >> >
>> >>
>> crf=20:subme=10:frameref=16:bframes=32:b_adapt=2:b_pyramid=normal:weightp=2:partitions=all:8x8dct:direct_pred=auto:me=tesa:trellis=2:merange=32:aq-mode=4:threads=auto:analyse=all
>> >> >
>> >> > Does it require manual turning on?
>> >>
>> >> Add mbtree to your options. Also....
>> >>
>> >> bframes=32?
>> >> b_adapt=2?
>> >> me=tesa?
>> >>
>> >> is there something wrong with you or do you just love using insane
>> >> option params?
>> >>
>> >> >
>> >> > --
>> >> > Баймуратов Гаяр
>> >> > icq: 1931143
>> >> > _______________________________________________
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>> >
>> >
>> >
>> > --
>> > Баймуратов Гаяр
>> > icq: 1931143
>> > _______________________________________________
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>
>
>
> --
> Баймуратов Гаяр
> icq: 1931143
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