[x264-devel] Idea for rate control.

[Henrik Gramner]

On Tue, Dec 2, 2014 at 11:26 PM, Николай Рыжков <namezys.work at gmail.com> wrote:
> Hello.
>
> My idea is using for encode video for streaming.
> When I prepare video for streaming I have bandwidth limition. Its limit is
> strong and average bitrate can’t be more than it.
> In other hand I want to prepare video with same quality.
> If I use bitrate control I get video with different quality. Usual the
> quality if whole video is quality of worst part of it. And if we have bad
> quality part spend all available bitrate for other part of video isn’t
> necessary.
> My idea is use CRF for reduce bitrate with general bitrate control. While
> encoding with average bitrate we can calculate CRF and decrease bitrate and
> quality is CRF became less than given.
> For example, then I prepare HD video CRF=20..22 is enough for me. But I
> encode with bitrate 5Mb. I understand that sometime 5Mb is more than
> necessary and bitrate may be reduced. But I can’t of it for different part
> of video.
>
> In addition we can calculate CRF while 1 pass and use value nearly max CRF
> for limit bitrate at 2nd pass.
>
> What are thinking about this idea?
>
> Nikolai Ryzhkov, iviru
>
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Have you tried CRF with VBV?