Download Key-Segments data
The data contains the SegTrack dataset  and for each of its videos: BPLRs , region proposals , and optical flows .
Note that it is
 D. Tsai, M. Flagg, and J. Rehg. Motion Coherent Tracking with Multi-Label MRF Optimization. BMVC 2010.
 J. Kim and K. Grauman. Boundary Preserving Dense Local Regions. CVPR 2011.
 I. Endres and D. Hoiem. Category Independent Object Proposals. ECCV 2010.
 T. Brox and J. Malik. Large displacement optical flow: descriptor matching in variational motion estimation. TPAMI 2011.
You can also download the data in parts. Once all parts have been downloaded, do " unzip '*.zip' ".