understanding libx264 output [closed]
Question
I used libx264 in ffmpeg to encode . Finally i got below output .
Can anyone guide me understanding & interpreting this?? Any reference/documentation?
01-01 06:34:43.650: I/stderr(6603): [libx264 @ 0xdd2040] frame I:7 Avg QP:27.51 size: 11996
01-01 06:34:43.650: I/stderr(6603): [libx264 @ 0xdd2040] frame P:32 Avg QP:26.90 size: 217
01-01 06:34:43.650: I/stderr(6603): [libx264 @ 0xdd2040] frame B:25 Avg QP:32.73 size: 39
01-01 06:34:43.650: I/stderr(6603): [libx264 @ 0xdd2040] consecutive B-frames: 20.0% 80.0%
01-01 06:34:43.650: I/stderr(6603): [libx264 @ 0xdd2040] mb I I16..4: 74.1% 17.0% 8.9%
01-01 06:34:43.650: I/stderr(6603): [libx264 @ 0xdd2040] mb P I16..4: 0.7% 0.1% 0.0% P16..4: 2.0% 0.3% 0.2% 0.0% 0.0% skip:96.6%
01-01 06:34:43.650: I/stderr(6603): [libx264 @ 0xdd2040] mb B I16..4: 0.0% 0.0% 0.0% B16..8: 1.2% 0.0% 0.0% direct: 0.1% skip:98.8% L0: 5.5% L1:94.5% BI: 0.0%
01-01 06:34:43.650: I/stderr(6603): [libx264 @ 0xdd2040] final ratefactor: 22.43
01-01 06:34:43.650: I/stderr(6603): [libx264 @ 0xdd2040] 8x8 transform intra:16.9% inter:51.1%
01-01 06:34:43.650: I/stderr(6603): [libx264 @ 0xdd2040] coded y,uvDC,uvAC intra: 12.8% 27.2% 24.4% inter: 0.3% 0.6% 0.0%
01-01 06:34:43.650: I/stderr(6603): [libx264 @ 0xdd2040] i16 v,h,dc,p: 95% 5% 0% 0%
01-01 06:34:43.650: I/stderr(6603): [libx264 @ 0xdd2040] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 2% 30% 60% 0% 1% 0% 2% 0% 4%
01-01 06:34:43.650: I/stderr(6603): [libx264 @ 0xdd2040] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 7% 58% 10% 2% 4% 2% 9% 1% 8%
01-01 06:34:43.650: I/stderr(6603): [libx264 @ 0xdd2040] i8c dc,h,v,p: 14% 81% 3% 3%
01-01 06:34:43.650: I/stderr(6603): [libx264 @ 0xdd2040] Weighted P-Frames: Y:0.0% UV:0.0%
01-01 06:34:43.650: I/stderr(6603): [libx264 @ 0xdd2040] ref P L0: 81.2% 16.6% 1.8% 0.4%
01-01 06:34:43.650: I/stderr(6603): [libx264 @ 0xdd2040] ref B L0: 70.8% 29.2%
01-01 06:34:43.650: I/stderr(6603): [libx264 @ 0xdd2040] kb/s:287.21
Edit: I want to know what determines rate factor? Is it relevant to fps? What is QP and it's relation with rate factor?
Thank You!!
Solution
All this output statistics are described here: https://en.wikibooks.org/wiki/MeGUI/x264_Settings/x264_Stats_Output
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