Field Comparison Graphs

##Peak Signal to Noise Ratio (PSNRf)#

This filter plots the Peak Signal to Noise Ratio between the video in field 1 (odd lines) versus the video in field 2 (even lines). Lower values indicate that field 1 and field 2 are becoming more different as would happen during a playback error such as a head clog. See http://ffmpeg.org/ffmpeg-filters.html#psnr for more information.

##Mean Square Error (MSEf)#

This filter is similar to PSNRf but reports on the Mean Square Error between field 1 and field 2. Higher values may be indicative of differences between the images of field 1 and field 2.