[gstreamer-bugs] [Bug 621663] x264enc: support changing bitrate property on the fly

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=621663
  GStreamer | gst-plugins-ugly | git

Ian Mitchell <mitch_1977muk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #175221|0                           |1
        is obsolete|                            |

--- Comment #22 from Ian Mitchell <mitch_1977muk at yahoo.co.uk> 2010-11-25 09:22:38 UTC ---
Created an attachment (id=175229)
 --> (https://bugzilla.gnome.org/attachment.cgi?id=175229)
Video encoded at an average of 250k

Log for the constant 250k bitrate:

x264 [info]: frame I:24    Avg QP:27.43  size:  7548  PSNR Mean Y:37.04 U:41.15
V:43.41 Avg:38.17 Global:37.90
x264 [info]: frame P:576   Avg QP:30.57  size:  1008  PSNR Mean Y:35.01 U:40.32
V:42.23 Avg:36.26 Global:36.02
x264 [info]: mb I  I16..4: 16.2% 44.0% 39.8%
x264 [info]: mb P  I16..4:  1.3%  1.8%  0.3%  P16..4: 40.4% 12.0%  3.2%  0.0% 
0.0%    skip:41.0%
x264 [info]: 8x8 transform intra:48.4% inter:69.3%
x264 [info]: coded y,uvDC,uvAC intra: 62.8% 51.6% 18.1% inter: 14.2% 7.5% 0.3%
x264 [info]: i16 v,h,dc,p: 29% 23% 23% 24%
x264 [info]: i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 14% 16% 21%  4% 11%  9% 10%  6%  8%
x264 [info]: i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 14% 14% 21%  4% 20%  7%  9%  3%  9%
x264 [info]: i8c dc,h,v,p: 57% 20% 18%  5%
x264 [info]: Weighted P-Frames: Y:0.3%
x264 [info]: ref P L0: 65.2% 21.1% 10.0%  3.7%  0.0%
x264 [info]: PSNR Mean Y:35.090 U:40.352 V:42.276 Avg:36.339 Global:36.086
kb/s:253.83

encoded[0] 600 frames, 76.99 fps, 253.83 kb/s

Log for the 25k average bitrate:

x264 [info]: frame I:24    Avg QP:30.11  size:  6419  PSNR Mean Y:35.44 U:40.39
V:42.40 Avg:36.65 Global:35.79
x264 [info]: NULL handle!
Average PSNR for encoder 0 is 36.059 frame #600, total bits so far 816642
Average PSNR for encoder 1 is 0.000 frame #600, total bits so far 0
frame P:576   Avg QP:30.73  size:  1150  PSNR Mean Y:34.78 U:40.11 V:41.97
Avg:36.03 Global:35.43
x264 [info]: mb I  I16..4: 18.6% 49.7% 31.7%
x264 [info]: mb P  I16..4:  1.4%  1.7%  0.3%  P16..4: 41.4% 12.8%  4.4%  0.0% 
0.0%    skip:38.0%
x264 [info]: 8x8 transform intra:50.1% inter:65.2%
x264 [info]: coded y,uvDC,uvAC intra: 54.9% 47.9% 17.2% inter: 16.1% 9.1% 0.4%
x264 [info]: i16 v,h,dc,p: 32% 26% 21% 22%
x264 [info]: i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 14% 14% 24%  4% 12%  9% 10%  6%  8%
x264 [info]: i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 13% 13% 23%  4% 19%  7%  9%  3%  8%
x264 [info]: i8c dc,h,v,p: 63% 17% 16%  4%
x264 [info]: Weighted P-Frames: Y:0.3%
x264 [info]: ref P L0: 65.6% 18.9% 11.3%  4.2%  0.0%
x264 [info]: PSNR Mean Y:34.809 U:40.124 V:41.986 Avg:36.059 Global:35.444
kb/s:272.21

encoded[0] 600 frames, 72.73 fps, 272.21 kb/s

I was in a rush and got it wrong, sorry about that, these are the correct files
and logs.

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