Why is P Sclice missing in my output?

[Pezeo]

Here's the output detail.

SUMMARY --------------------------------------------------------
Total Frames | Bitrate Y-PSNR U-PSNR V-PSNR YUV-PSNR
1174 a 2552.1377 10.7738 10.5712 10.5767 10.6292

I Slices--------------------------------------------------------
Total Frames | Bitrate Y-PSNR U-PSNR V-PSNR YUV-PSNR
37 i 80699.3050 17.2293 13.5518 13.5473 15.5626

P Slices--------------------------------------------------------
Total Frames | Bitrate Y-PSNR U-PSNR V-PSNR YUV-PSNR
0 p -nan(ind) -nan(ind) -nan(ind) -nan(ind) -nan(ind)

B Slices--------------------------------------------------------
Total Frames | Bitrate Y-PSNR U-PSNR V-PSNR YUV-PSNR
1137 b 9.0901 10.5637 10.4743 10.4800 10.5343

[adamjw24]

See #137 (reply in thread)