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I'm successfully overlaying videos using the following parameters, in this case centering the overlayed video

_ffmpeg.parameters=['-i', _bkgdVid, '-i', _overVid, '-y', '-filter_complex', 'overlay=(main_w-overlay_w)*.5:(main_h-overlay_h)*.5', '-acodec', 'aac', '-strict', '-2', _destVid];

But what I need to do is BOTH overlay AND time shift the overlayed video.

This is what I have tried most recently

_ffmpeg.parameters=['-i', _bkgdVid, '-i', _overVid,'-itsoffset','2','-y', '-      
                    filter_complex','overlay=(main_w-overlay_w)*.5:
                    (main_h-overlay_h)*.5', '-acodec','aac','-strict',
                   '-2', '-map', '1:0', '-map' ,'0:1',_destVid];

And this is the error message ERROR - Data stream encoding not supported yet (only streamcopy)

Can anyone help? Is this even possible(overlay AND time shifting?

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Please update your question to exclude any scripting. Including an actual ffmpeg command and the complete output will be more useful so others can attempt to duplicate your issue. This will also rule out any additional issues caused by the scripting. – LordNeckbeard Nov 20 '12 at 18:24

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