[FFmpeg-devel] [PATCH] avcodec/nvenc: Video Codec SDK 10 features support

[hydra3333 at gmail.com]

> > Hello,
> >
> > This patch adds Video Codec SDK 10 features support:
> > 
> >   *   Presets and tuning info
> >   *   Multipass encode modes
> >   *   Low Delay Key Frame Scale
>
>
> Hello and thank you for this patch.  Possibly this post belongs in
ffmepg-user.
>
> Per the above archive post above (
http://ffmpeg.org/pipermail/ffmpeg-devel/2020-June/265441.html )
> 
> Perhaps add a link and/or examples to be added to the internal help ?
>
> 1. In this thread/patch, what's the difference between options slow, P7,
and hq ?
>
> Which is the "best" quality (some all say hq and a couple also say
multi-pass eg 2-pass) ?
>
> 2. How to combine and use the new options separately and/or in combination
with these, to achieve "best" quality ?
> multipass
> fullres
> ...
> -preset slow
> -2pass 1
> -rc:v vbr_hq
>
> 3. is there a link to a table of which models of cards have what features
enabled and what the target objectives are for each option, perhaps even a
ranking of quality/speed ?
>
> Thanks

Ah.  Pages 17 onward from this nvidia pdf go some way to explaining it.

http://developer.download.nvidia.com/video/gputechconf/gtc/2020/presentation
s/s21337-nvidia-video-technologies-video-codec-and-optical-flow-sdk.pdf