[FFmpeg-user] UDP NVENC HEVC transcoding#

[Leonardo Pagotto]

Thank you, Moritz

On Wed, Aug 19, 2020 at 9:32 AM Moritz Barsnick <barsnick at gmx.net> wrote:

> On Mon, Aug 17, 2020 at 11:21:38 -0300, Leonardo Pagotto wrote:
> > I'm transcoding/resizing some UDP live streams using CUVID and NVENC. It
> > works but I got the feeling could be better, this is the my command line:
>
> What feeling is that? Faster, higher quality, just more efficient?
>
> > ffmpeg -vsync 0 -hwaccel cuvid -c:v h264_cuvid -resize 1280x720
> > -drop_second_field 1 -i udp://
> > 230.8.0.7:10008?buffer_size=3000000?fifo_size=1000000&overrun_nonfatal=1
> > -crf 30 -c:a -c:v hevc_nvenc -profile:v main -pass 2 -rc vbr -maxrate 3M
> -f
> > mpegts udp://239.210.210.7:1234?pkt_size=1316&localaddr=10.10.71.55
>
> I don't think this is a working command line.
> - "-c:a -c:v hevc_nvenc" is missing something.
> - "-pass 2" is for multipass encoding, right? Does that make sense with
> UDP to
>   UDP encoding?
>
> I don't know anything about cuvid on nvenc usage, so I can't actually
> help you with that. ;)
>
> (I also recommend chacking out presets before manually tweaking
> parameters, unless you already know what you want to achieve.)
>
> Moritz
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