FFMPEG, VP9 and Google Developers

[Drag]

Google people made very nice pages about FFMPEG & VP9 encoding with a lot of coding samples.
https://developers.google.com/media/vp9/the-basics/
https://developers.google.com/media/vp9/settings/vod/

On that pages, they did their best but, IMHO, they should give more recommendation or opinion than they did.

I would like to hear from experts some comments about that pages… for example:

1. which is the optimal variant for relation output quality <--> output size <--> encoding time in means files is for archiving, not for online publishing;
2. the same question as above but files are for online publishing, not for keeping;
3. If I am satisfied with next HEVC line:

ffmpeg -i "input file name.ext" -c:v libx265 -preset slower ^
-c:a aac -vbr 4 "out file name.mkv"

what will be the analogue in VP9.

Maybe my way of thinking is wrong and I should reread that pages again and again and try to understand each feature?

Thanks in advance.

[blud7]

There are different ways:

ffmpeg -i "input file name.ext" -c:v libvpx-vp9 -b:v 2M -c:a libopus "out file name.webm"

ffmpeg -i "input file name.ext" -c:v libvpx-vp9 -crf 30 -b:v 0 -c:a libopus "out file name.webm"

The former is bitrate based (-b:v 2M) and the latter quality based (-crf 30 -b:v 0). Note that you must include -b:v 0 for a constant quality encode.

For more you can try here.

[Drag]

For more you can try here.

Thanks. I already read all of that pages...