[FFmpeg-user] Region of Interest Coding in ffmpeg

Yang Guo yangguo47 at gmail.com
Wed Nov 13 20:22:46 CET 2013

To clarify on my previous post: I am currently using x264 though am open to
using any encoder that has this "region of interest" capability.  Thanks!


On Tue, Nov 12, 2013 at 2:19 PM, Yang Guo <yangguo47 at gmail.com> wrote:

> Hi ffmpeg community,
> I am looking to encode a frame with "region of interest (ROI)" coding.
> The idea is that I have a frame in which I know that certain regions (for
> example, the center) are more likely to be the subject of interest relative
> to other regions (ex: the sides).  My thought was to use macroblock-level
> quantization stepsize (QP).  How can I achieve this with ffmpeg from the
> command line?
> Moreover, ideally I would like to specify a different ROI for each frame.
> How can this be done?
> Thanks for your help in advance!
> Yang

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