问题
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!!
回答1:
All this output statistics are described here: https://en.wikibooks.org/wiki/MeGUI/x264_Settings/x264_Stats_Output
来源：https://stackoverflow.com/questions/21016329/understanding-libx264-output