[x264-devel] x264 vbv setting mismatch

[Gunnar Adler]

I don't think this is a problem at all.

I think I read that somewhere on doom9's forum which has several posts
about VBV and threads. A quick search returned this but it does not have a
detailed explanation: http://forum.doom9.org/showthread.php?t=152950

Maybe someone else with better long term memory can point to more
information...

Best,
Gunnar


On Mon, Dec 2, 2013 at 2:24 AM, kevin bai <maosheng.bai at gmail.com> wrote:

> Thanks Gunnar,
>
> I am not quite sure how this problem comes from. Do you mean the VBV
> module(prediction...) is not idential in multiple threads?
> Can you provide some more detailed info? Thanks a lot!
>
> Regards,
> Kevin
>
>
> 2013/11/29 Gunnar Adler <gunnar.adler at googlemail.com>
>
>> This is OK and almost always the case when encoding with multiple threads.
>> Setting --threads 1 should do the trick and get you bit identical results.
>>
>> Best regards,
>> Gunnar
>>
>>
>> On Fri, Nov 29, 2013 at 3:24 AM, kevin bai <maosheng.bai at gmail.com>wrote:
>>
>>> Hi,
>>>
>>> When I use x264 2-pass encoding, if set the VBV buffer/max bitrate, I
>>> got diffent results(es, stats) for 2 times running. Does anyone meet such
>>> problem?
>>>
>>> Version: x264-snapshot-20131110-2245
>>>
>>> The paramter settings are very simple:
>>> ./x264 --bitrate 600 --vbv-bufsize 600 --vbv-maxrate 600 -o es1.264
>>> /data/test/yuv/Mobile_720x576.yuv 720x576
>>>
>>>
>>> Regards,
>>> Kevin
>>>
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>>>
>>>
>>
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>>
>
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