[Bug 766832] encoder: Add CBR and VBR support in VP9

GStreamer (GNOME Bugzilla) bugzilla at gnome.org
Fri Jun 2 08:43:39 UTC 2017


https://bugzilla.gnome.org/show_bug.cgi?id=766832

--- Comment #9 from Hyunjun Ko <zzoon at igalia.com> ---
(In reply to sreerenj from comment #8)
> Quick note:
> Fractional fps should be submitting like this:
>     /*
>      * The framerate is specified as a number of frames per second, as a
>      * fraction.  The denominator of the fraction is given in the top half
>      * (the high two bytes) of the framerate field, and the numerator is
>      * given in the bottom half (the low two bytes).
>      *
>      * That is:
>      * denominator = framerate >> 16 & 0xffff;
>      * numerator   = framerate & 0xffff;
>      * fps         = numerator / denominator;
>      *
>      * For example, if framerate is set to (100 << 16 | 750), this is
>      * 750 / 100, hence 7.5fps.
>      *
>      * If the denominator is zero (the high two bytes are both zero) then
>      * it takes the value one instead, so the framerate is just the integer
>      * in the low 2 bytes.
>      */
Thanks for information!
I should be working on this.

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