  Video frame interpolation, the task of synthesizing new frames in between two
or more given ones, is becoming an increasingly popular research target.
However, the current evaluation of frame interpolation techniques is not ideal.
Due to the plethora of test datasets available and inconsistent computation of
error metrics, a coherent and fair comparison across papers is very
challenging. Furthermore, new test sets have been proposed as part of method
papers so they are unable to provide the in-depth evaluation of a dedicated
benchmarking paper. Another severe downside is that these test sets violate the
assumption of linearity when given two input frames, making it impossible to
solve without an oracle. We hence strongly believe that the community would
greatly benefit from a benchmarking paper, which is what we propose.
Specifically, we present a benchmark which establishes consistent error metrics
by utilizing a submission website that computes them, provides insights by
analyzing the interpolation quality with respect to various per-pixel
attributes such as the motion magnitude, contains a carefully designed test set
adhering to the assumption of linearity by utilizing synthetic data, and
evaluates the computational efficiency in a coherent manner.
