[MEncoder-users] grabbing a single frame

[Stjepan Brbot]

P and B frames contain motion vectors for reconstructing (compensation)
of current picture from vectors and previous I/P frame blocks plus
differential DCT coeficients for adding to correct what motion vectors
were not able to predict. So how to grab such a data and how to present
it is your question.

In many book about video coding it is shown an example with current and
next full video image and what you get when subtract them showing
temporal redundancy that is coded. Probably you'd like to see that!

I don't know how to do that but I'd like to get this "differential"
image too. I think it's done with Matlab's simulink functions.

On Wed, 2011-03-23 at 19:44 -0400, Steven Miller wrote:
> Is it possible to grab and save a single frame, be it an I or P or B frame?
> I want the single frame. Not what the decoder would show you. I'm trying to
> get a feel for how each frame type looks.  I'm using mencoder/libx264.
> 
> Let me know if I haven't described what I'm after well enough.
> 
> thanks,
> Steve
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