[Cin] how to add -bitexact flag to encoder?

[Andrew Randrianasulu]

пт, 25 нояб. 2022 г., 03:22 Phyllis Smith via Cin <
cin at lists.cinelerra-gg.org>:

> Interesting results from tests using "flags" on a small 4K webm video
> only.  You can see "bitexact" is the same as flags set to unaligned, mv4,
> qpel, and gray. Cgop and Global Header do differ so it appears that "flags"
> is working.
>
>    SAME 69705241 Nov 24 15:29 unaligned.mp4
>    SAME 69705241 Nov 24 15:30 mv4.mp4
>    SAME 69705241 Nov 24 16:51 qpel.mp4
>    Different 69808336 Nov 24 15:23 *cgop*.mp4
>    SAME 69705241 Nov 24 16:57 gray.mp4
>    SAME  69705241 Nov 24 17:00 *bitexact.*mp4
>    Different  69704581 Nov 24 17:02 *global_header*.mp4
>

in theory bitexact should product exactly same file on different runs - no
time/date metadata embedded for example ....

>
> On Thu, Nov 24, 2022 at 12:11 PM Phyllis Smith <phylsmith2017 at gmail.com>
> wrote:
>
>> deim31:
>> As Andrew said, it is there in "flags" (at least for mp4 and mov) but
>> with the video I tried, *I saw no difference*.  Steps to get flag
>> "bitexact":
>>
>> 1) bring up render menu and set your File Format as usual to FFMPEG/mp4
>> or mov (have not tried others)
>> 2) click on the Video wrench, then click on box in Video Options "view"
>> which brings up a menu
>> 3) in the 2nd line on the top right is the box Kind which is set to
>> codec; use the arrow to set to "ffmpeg"
>> 4) on the left side scroll down in the option area and look for "flags"
>> and highlight that
>> 5) above the option header is now the word "flags" with a down arrow;
>> click on arrow and you see "bitexact" which you should click on and you
>> will see the value switch from 0x0 to 0x00800000 (I lost count of zeros but
>> you get it)
>> 6 ) click on Apply box below the Kind box and click OK button in menu
>>
>> Please let us know if this actually works.
>>
>> On Thu, Nov 24, 2022 at 9:39 AM deim31 via Cin <
>> cin at lists.cinelerra-gg.org> wrote:
>>
>>> Hi,
>>>
>>> I'm looking for way to add to Cin's ffmpeg encoder -bitexact flag.
>>>
>>> I've tried to add similar way as
>>> movflags=+faststart
>>>
>>> but didn't succeed with any of:
>>>
>>> -bitexact
>>> bitexact
>>> bitexact=
>>>
>>> Thanks :-)
>>>
>>> --
>>> Cin mailing list
>>> Cin at lists.cinelerra-gg.org
>>> https://lists.cinelerra-gg.org/mailman/listinfo/cin
>>>
>> --
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>
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