[Libav-user] how to set mjpeg encoding quality programmatically?

YIRAN LI mrfun.china at gmail.com
Fri Jun 10 05:32:28 CEST 2016


2016-06-09 23:29 GMT+10:00 Carl Eugen Hoyos <cehoyos at ag.or.at>:

> YIRAN LI <mrfun.china at ...> writes:
>
> > AVCodecContext.flags |= CODEC_FLAG_QSCALE
> > and AVCodecContext.global_quality  = qscale * FF_QP2LAMBDA,
> > in my case qscale = 3
>
> This is correct, qscale 3 ensures (with mpeg-4 asp) a
> near-lossless visual quality.
>
>
‚ÄčThansk Carl, I think I can use the same way to set quality for mpeg4
video, right?

What't the differenct between it and seting qmin qmax in codeccctx?

Thanks
‚Äč


> Carl Eugen
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