[FFmpeg-devel] [PATCH] doc/encoders: add VP9 temporal scalability encoding option

Wonkap Jang wonkap at google.com
Thu Dec 19 00:08:21 EET 2019


Will do.

Thanks!

Wonkap

On Wed, Dec 18, 2019 at 1:37 PM James Zern <jzern-at-google.com at ffmpeg.org>
wrote:

> Hi,
>
> On Wed, Dec 18, 2019 at 10:16 AM Wonkap Jang <wonkapjang at gmail.com> wrote:
> >
> > Hi James,
> >
> > Some of the changes are on lines right next to each other, and will cause
> > conflict... I could make it a separate commit...
> > Would that work?
> > So, I would make docs into two separate commits and the code already has
> > two commits... so overall 4 commits in succession.
> >
>
> The doc fix should land quickly, so the other could be rebased after that.
>
> > Would this work?
> >
> > Thank you,
> >
> > Wonkap
> >
> >
> > On Tue, Dec 17, 2019 at 5:59 PM James Zern <
> jzern-at-google.com at ffmpeg.org>
> > wrote:
> >
> > > Hi,
> > >
> > > On Mon, Dec 16, 2019 at 2:21 PM Wonkap Jang
> > > <wonkap-at-google.com at ffmpeg.org> wrote:
> > > >
> > > > Documentation change for adding support for encoding
> > > > with temporal scalability in VP9.
> > > > ---
> > >
> > > This part sounds related to the other patches you're sending. The
> > > documentation can be added with the code change for vp9.
> > >
> > > >  doc/encoders.texi | 23 ++++++++++++++++++-----
> > > >  1 file changed, 18 insertions(+), 5 deletions(-)
> > > >
> > > > diff --git a/doc/encoders.texi b/doc/encoders.texi
> > > > index 4ee518a124..7efc446a6c 100644
> > > > --- a/doc/encoders.texi
> > > > +++ b/doc/encoders.texi
> > > > [...]
> > > >  ffmpeg -i INPUT -c:v libvpx -ts-parameters ts_number_layers=3:\
> > > > -ts_target_bitrate=250000,500000,1000000:ts_rate_decimator=4,2,1:\
> > > > -ts_periodicity=4:ts_layer_id=0,2,1,2 OUTPUT
> > > > +ts_target_bitrate=250,500,1000:ts_rate_decimator=4,2,1:\
> > > > +ts_periodicity=4:ts_layer_id=0,2,1,2:ts_layering_mode=3 OUTPUT
> > > >  @end example
> > > >  Below is a brief explanation of each of the parameters, please
> > > >  refer to @code{struct vpx_codec_enc_cfg} in @code{vpx/vpx_encoder.h}
> > > for more
> > > > @@ -1903,13 +1901,28 @@ details.
> > > >  @item ts_number_layers
> > > >  Number of temporal coding layers.
> > > >  @item ts_target_bitrate
> > > > -Target bitrate for each temporal layer.
> > > > +Target bitrate for each temporal layer in kbps.
> > > > +(bitrate should be inclusive of the lower temporal layer).
> > >
> > > This portion is a bug fix for the existing docs (bps -> kbps). Can you
> > > split this out to its own patch?
> > > _______________________________________________
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