The Object Sequence setting is available when TGA or PNG is selected as the media format.
Activate the Export into separate files checkbox to export each object into full-scene 1:1 scale image sequences for further editing in a video editor.
The Fit to object size option allows you to filter out static objects and export animated objects to their original object-size with the maximum bounding for the entire range of motion.
Please refer to the Post-Production with Video Editor section for more information.
Note that the Object Sequence feature cannot work simultaneously with the 3D Stereo function.