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

[deim31]

I was finding the way to strip file as much as possible since disabling 
mapping metadata in ffmpeg stopped working in the past and this was the 
only way worked, but still not optimally - some metas remains ;-)

--deim

Dne 25. 11. 22 v 1:57 Andrew Randrianasulu via Cin napsal(a):
>
>
> 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 :-)
>
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>
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>
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