[FFmpeg-user] Actual bitrate is lower than target

[Wesley Wen]

On Wed, Jul 15, 2015 at 6:49 AM, James Darnley <james.darnley at gmail.com>
wrote:

> On 2015-07-14 23:00, Wesley Wen wrote:
> > -g 29.9002997
>
> This is an integer parameter.
>
> > [libx264 @ 0x7ff1e8816e00] frame I:71    Avg QP: 2.19  size: 46261
> > [libx264 @ 0x7ff1e8816e00] frame P:2040  Avg QP: 2.51  size: 11560
>
> > [libx264 @ 0x7f948a822800] frame I:71    Avg QP: 1.80  size: 48058
> > [libx264 @ 0x7f948a822800] frame P:2040  Avg QP: 2.04  size: 12990
>
> Your video is just too simple to reach 7M with the settings you've
> chosen.  This shows that you're pushing against the minimum QP of 0.
>
Do you mean source video is too simple? And I don't really understand QP,
could you help explain more and give me some suggestion?

Thanks for the reply.
-wesley

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