Final ratefactor problem

[Max_Cady]

i'm getting low final ratefactor when i use filters(MCTemporalDenoise,LSFmod).No problem with usual way.Why is this happening? :confused:

Example avs:

,
,
MCTemporalDenoise(settings="medium")

Spline36Resize(1280,720)

[kypec]

What ratefactor are you referring to? Do you mean average QP values when encoding with x264 CRF mode? Anyway, explain better what is your question about and don't forget to post AVS scripts & command line parameters & output logs.

[Groucho2004]

I'm guessing that you're doing 2-pass encodes and the "Final Ratefactor" is what x264 uses as a starting value for the second pass. It will constantly adjust it to reach the desired target bitrate.

If you're using de-noising filters, the compressibility increases and therefore the quality (i.e. the rate factor) at a given bitrate.

[Max_Cady]

[Information] Log
-[Information] Versions
--[Information] [28.03.2011 17:16:05] MeGUI Version : 2002 (svn)
--[Information] [28.03.2011 17:16:05] OS : Windows Seven Ultimate Edition x86 SP1 (6.1.65536.7601)
--[Information] [28.03.2011 17:16:05] Latest .Net Framework installed : 3.5 (3.5.30729.5420)
--[Information] [28.03.2011 17:16:05] Avisynth Version : 2.5.7.0 (01.03.2007 19:27:14)
-[Information] Update detection
--[Information] [28.03.2011 17:16:05] Connecting to server: http://megui.org/auto/
--[Information] [28.03.2011 17:16:08] All files are up to date
-[Information] Log for job1 (video, 1.avs -> )
--[Information] [28.03.2011 17:21:32] Started handling job
--[Information] [28.03.2011 17:21:32] Preprocessing
--[Information] [28.03.2011 17:21:32] Avisynth input script
---[NoImage] LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\MT.dll")
---[NoImage] import("c:\program files\avisynth 2.5\plugins\MCTemporalDenoise.v1.4.20.avs")
---[NoImage] import("c:\program files\avisynth 2.5\plugins\LSFmod.v1.9.avs")
---[NoImage] LoadPlugin("C:\Program Files\MeGUI_1989_x86\tools\dgavcindex\DGAVCDecode.dll")
---[NoImage] AVCSource("C:\Users\Unforgiven\Desktop\xxx\1.dga")
---[NoImage] #deinterlace
---[NoImage] #crop
---[NoImage] Spline36Resize(848,360)
---[NoImage] MT(""" MCTemporalDenoise(settings="medium") """, threads=8, overlap=16)
--[Information] [28.03.2011 17:22:16] Job commandline: "C:\Program Files\MeGUI_1989_x86\tools\x264\x264.exe" --level 4.1 --pass 1 --bitrate 2278 --stats "C:\Users\Unforgiven\Desktop\xxx\1.stats" --deblock -2:-1 --keyint 60 --bframes 8 --b-pyramid strict --ref 16 --slices 4 --qpmin 10 --qpmax 51 --vbv-bufsize 30000 --vbv-maxrate 40000 --aq-strength 0.8 --merange 24 --me umh --direct auto --subme 10 --partitions all --trellis 2 --no-dct-decimate --no-fast-pskip --output NUL "C:\Users\Unforgiven\Desktop\xxx\1.avs"
--[Information] [28.03.2011 17:22:16] Encoding started
--[Information] [29.03.2011 07:52:30] Standard output stream
--[Information] [29.03.2011 07:52:30] Standard error stream
---[NoImage] avs [info]: 720x576p 64:45 @ 24000/1001 fps (cfr)
---[NoImage] x264 [info]: using cpu capabilities: MMX2 SSE2Fast FastShuffle SSEMisalign LZCNT
---[NoImage] x264 [info]: profile Main, level 4.1
---[NoImage]
---[NoImage] x264 [info]: frame I:6482 Avg QP:12.79 size: 64370
---[NoImage] x264 [info]: frame P:131852 Avg QP:15.81 size: 20731
---[NoImage] x264 [info]: frame B:191572 Avg QP:18.30 size: 4027
---[NoImage] x264 [info]: consecutive B-frames: 13.5% 27.2% 16.7% 19.0% 19.9% 2.7% 0.2% 0.0% 0.9%
---[NoImage] x264 [info]: mb I I16..4: 24.2% 0.0% 75.8%
---[NoImage] x264 [info]: mb P I16..4: 22.2% 0.0% 0.0% P16..4: 72.1% 0.0% 0.0% 0.0% 0.0% skip: 5.8%
---[NoImage] x264 [info]: mb B I16..4: 2.5% 0.0% 0.0% B16..8: 31.4% 0.0% 0.0% direct:16.9% skip:49.2% L0:28.4% L1:38.8% BI:32.8%
---[NoImage] x264 [info]: final ratefactor: 15.12
---[NoImage] x264 [info]: direct mvs spatial:99.5% temporal:0.5%
---[NoImage] x264 [info]: coded y,uvDC,uvAC intra: 58.5% 54.4% 24.3% inter: 33.0% 23.3% 10.5%
---[NoImage] x264 [info]: i16 v,h,dc,p: 50% 18% 23% 9%
---[NoImage] x264 [info]: i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 28% 16% 16% 3% 9% 7% 5% 7% 7%
---[NoImage] x264 [info]: i8c dc,h,v,p: 56% 15% 24% 5%
---[NoImage] x264 [info]: Weighted P-Frames: Y:2.6% UV:0.7%
---[NoImage] x264 [info]: kb/s:2280.33
---[NoImage] encoded 329906 frames, 6.32 fps, 2280.33 kb/s
--[Information] [29.03.2011 07:52:30] Postprocessing
---[Information] Deleting intermediate files
--[Information] [29.03.2011 07:52:30] Job completed
-[Information] Log for job2 (video, 1.avs -> 1.mkv)
--[Information] [29.03.2011 07:52:30] Started handling job
--[Information] [29.03.2011 07:52:30] Preprocessing
--[Information] [29.03.2011 07:52:30] Avisynth input script
---[NoImage] LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\MT.dll")
---[NoImage] import("c:\program files\avisynth 2.5\plugins\MCTemporalDenoise.v1.4.20.avs")
---[NoImage] import("c:\program files\avisynth 2.5\plugins\LSFmod.v1.9.avs")
---[NoImage] LoadPlugin("C:\Program Files\MeGUI_1989_x86\tools\dgavcindex\DGAVCDecode.dll")
---[NoImage] AVCSource("C:\Users\Unforgiven\Desktop\xxx\1.dga")
---[NoImage] #deinterlace
---[NoImage] #crop
---[NoImage] Spline36Resize(848,720)
---[NoImage] MT(""" MCTemporalDenoise(settings="medium") """, threads=8, overlap=16)
--[Information] [29.03.2011 07:53:11] Job commandline: "C:\Program Files\MeGUI_1989_x86\tools\x264\x264.exe" --level 4.1 --pass 2 --bitrate 2278 --stats "C:\Users\Unforgiven\Desktop\xxx\1.stats" --deblock -2:-1 --keyint 60 --bframes 8 --b-pyramid strict --ref 16 --slices 4 --qpmin 10 --qpmax 51 --vbv-bufsize 30000 --vbv-maxrate 40000 --aq-strength 0.8 --merange 24 --me umh --direct auto --subme 10 --partitions all --trellis 2 --no-dct-decimate --no-fast-pskip --output "C:\Users\Unforgiven\Desktop\xxx\1.mkv" "C:\Users\Unforgiven\Desktop\xxx\1.avs"
--[Information] [29.03.2011 07:53:11] Encoding started
--[Information] [30.03.2011 02:22:03] Standard output stream
--[Information] [30.03.2011 02:22:03] Standard error stream
---[NoImage] avs [info]: 720x576p 64:45 @ 24000/1001 fps (cfr)
---[NoImage] x264 [info]: using cpu capabilities: MMX2 SSE2Fast FastShuffle SSEMisalign LZCNT
---[NoImage] x264 [info]: profile High, level 4.1
---[NoImage]
---[NoImage] x264 [info]: frame I:6482 Avg QP:14.40 size: 57689
---[NoImage] x264 [info]: frame P:131852 Avg QP:16.07 size: 21454
---[NoImage] x264 [info]: frame B:191572 Avg QP:19.93 size: 3734
---[NoImage] x264 [info]: consecutive B-frames: 13.5% 27.2% 16.7% 19.0% 19.9% 2.7% 0.2% 0.0% 0.9%
---[NoImage] x264 [info]: mb I I16..4: 5.9% 70.1% 24.1%
---[NoImage] x264 [info]: mb P I16..4: 1.0% 5.6% 0.9% P16..4: 47.1% 30.6% 10.0% 1.3% 1.1% skip: 2.5%
---[NoImage] x264 [info]: mb B I16..4: 0.0% 0.1% 0.0% B16..8: 39.4% 11.4% 2.9% direct: 4.1% skip:41.9% L0:36.0% L1:45.0% BI:19.0%
---[NoImage] x264 [info]: 8x8 transform intra:72.7% inter:49.0%
---[NoImage] x264 [info]: direct mvs spatial:96.3% temporal:3.7%
---[NoImage] x264 [info]: coded y,uvDC,uvAC intra: 79.5% 74.0% 45.9% inter: 27.1% 23.2% 13.1%
---[NoImage] x264 [info]: i16 v,h,dc,p: 37% 11% 16% 36%
---[NoImage] x264 [info]: i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 15% 8% 8% 9% 12% 13% 10% 13% 12%
---[NoImage] x264 [info]: i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 15% 6% 7% 11% 14% 14% 10% 12% 11%
---[NoImage] x264 [info]: i8c dc,h,v,p: 43% 23% 22% 11%
---[NoImage] x264 [info]: Weighted P-Frames: Y:2.8% UV:0.7%
---[NoImage] x264 [info]: ref P L0: 58.3% 10.8% 12.0% 5.2% 3.5% 2.6% 2.0% 1.2% 1.0% 0.8% 0.7% 0.5% 0.5% 0.4% 0.4% 0.2%
---[NoImage] x264 [info]: ref B L0: 87.2% 6.0% 2.7% 1.2% 0.8% 0.6% 0.5% 0.3% 0.2% 0.2% 0.1% 0.1% 0.1% 0.1%
---[NoImage] x264 [info]: ref B L1: 94.6% 5.4%
---[NoImage] x264 [info]: kb/s:2277.95
---[NoImage] encoded 329906 frames, 4.96 fps, 2277.95 kb/s
--[Information] Final statistics
---[Information] [30.03.2011 02:22:46] Video Bitrate Desired: 2278 kbit/s
---[Information] [30.03.2011 02:22:46] Video Bitrate Obtained (approximate): 2279 kbit/s
--[Information] [30.03.2011 02:22:46] Postprocessing
---[Information] Deleting intermediate files
----[Information] [30.03.2011 02:22:46] Successfully deleted C:\Users\Unforgiven\Desktop\xxx\1.stats
----[Information] [30.03.2011 02:22:46] Successfully deleted C:\Users\Unforgiven\Desktop\xxx\1.stats.mbtree
--[Information] [30.03.2011 02:22:46] Job completed

LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\MT.dll")
import("c:\program files\avisynth 2.5\plugins\MCTemporalDenoise.v1.4.20.avs")
import("c:\program files\avisynth 2.5\plugins\LSFmod.v1.9.avs")
LoadPlugin("C:\Program Files\MeGUI_1989_x86\tools\dgavcindex\DGAVCDecode.dll")
AVCSource("C:\Users\Unforgiven\Desktop\Once Upon A Time In America (1984)\1.dga")
#deinterlace
#crop

Spline36Resize(848,360)

MT(""" MCTemporalDenoise(settings="medium") """, threads=8, overlap=16)

if i dont use denoisers, i'm getting higher ratefactor(18-19) same final filesize that is the problem. :confused:

[Rumbah]

The file size shouldn't change as you specified a bitrate (2278).
A lower ratefactor means better quality. So if you filter the noise it is easier to compress so x264 has to use a higher quality to hit the desired bitrate.
In exchange you could lower the bitrate if you filter the noise to get a similar ratefactor result.

[Groucho2004]

if i dont use denoisers, i'm getting higher ratefactor(18-19) same final filesize that is the problem. :confused:

OK, you don't understand the replies so let's try something different - What makes you believe you have a "problem" when the ratefactor is lower?

[ajp_anton]

Lower ratefactor = better quality.

When you denoise, the video is easier to compress.
Using the same bitrate on the denoised video, x264 will have an easier job making the encode look like the source (x264's source is the denoised video), which for x264 means a higher quality, and therefore a lower ratefactor. x264 has no idea what the video looked like before denoising.