[FFmpeg-user] what are the ffmpeg default options for media conversion?

Carl Eugen Hoyos cehoyos at ag.or.at
Fri Feb 24 22:09:43 CET 2012

Atish Kathpal <atish.kathpal <at> gmail.com> writes:

> When I say "ffmpeg -r 25 -s 1920x1080 -i Source.yuv -sameq Dest.avi", I get
> a bigger Dest.avi as compared to when I just say, ffmpeg -r 25 -s 1920x1080
> -i Source.yuv Dest.avi". What was teh default quality taken as in the later
> case?

The -sameq has a meaning that you may find counter-intuitive, it does not mean
"same quality" (but same quantizer) and probably does not make sense for
rawvideo input.

> I know that there is an option "-q" ranging from 1 to 31 (with 1 being best
> quality). So what is the default quality taken as for the destination file,
> when -q or -sameq not specified explicitly?

The default is not to use constant quality (as implied by -q) but CBR (which btw
does not mean fixed frame size) at 200kb/s iirc.

Carl Eugen

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