getVideoFrameProcessingOffsetAverage

com.google.android.exoplayer2.ExoPlayer extension function that calculates the metric to evaluate the rendering performance called Video Frame Processing Offset (VFPO). VFPO measures how early the player processes a video frame compared to its presentation time, in microseconds.

• For example, if a video frame is processed by the player 30ms before the frame should be displayed on screen, the VFPO of this frame is 30000.

• Similarly, if a video frame is processed too late by 10ms (the player’s current position has progressed beyond the frame’s presentation time), the VFPO for this frame is -10000 (and the video frame is dropped). The smooth playback, without dropped frames or audio underruns, is expected when the average VFPO is above 40000.

videoFrameProcessingOffsetAverage is computed by taking a sum of VFPOs captured over a playback time period and dividing the sum by the number of VFPOs captured over the same time period.