Filtering help needed

[x264]

Ok. Suppose i want to denoise a clip with NLmeansCL(uses GPU) what changes should i make in the script? should i call the setmtmode(5,2) before calling the NLMeansCL filter?

[Selur]

The setMTMode(X,Y) call is only allowed ONCE in the whole script, at the beginning, als following setMTMode-Calls only have one parameter, the mode.
Modes change only through setMtMode-Calls, so if you are already in mode 5 you do not have to switch to mode 5, if you are in example in mode 2, switching is recommend.

[x264]

What is the use of SetMemoryMax()? i've seen this used in some of the scripts of doom9 members.

[Selur]

read http://avisynth.org/mediawiki/Internal_functions/Control_functions -> SetMemoryMax

[x264]

How much memory does avisynth use by default?

[Selur]

The amount of memory avisynth itself uses by default is stated at the link I provided.
(the amount of memory the avisynth plugins consume depends on the plugin and is independent of setMemoryMax)

[x264]

The encode with MT has been going on for about 15 hrs now. the encoding fps is 0.370 as of now with the placebo preset.

[Selur]

placebo -> http://en.wikipedia.org/wiki/Placebo
I totally don't get you 1st you want to speed up your '-preset slower' encode and then you choose '-preset placebo'.

[x264]

I'm encoding with the placebo preset so that i can compare it with the slowest preset.

[jagabo]

There's hardly any difference between slow and placebo. Not much difference between medium and placebo. As a rough indicator here are the results of some test I ran at different presets (CRF=18, quad core i5 2500K CPU, DVD source, no filtering):

                fps     bitrate
-------------------------------
ultrafast       457     5066
superfast       386     3275
veryfast        260     2119
medium           82     2651
slow             52     2591
veryslow         13     2315
placebo           5     2351

Results will vary depending on the source. And obviously, overall speed will vary depending on CPU.

[x264]

Can i use SubtitleEdit to OCR hardsubbed .avi videos?

[Selur]

I don't think so, but you can try,... SubExtractor and SubRip should be able to do it,..

[x264]

Ok. Is there a software like avsmeter which can calculate the encoding speed of my avs script in x264?

[Selur]

What's wrong with AVSMeter ? It measures the speed of your avisynth script, which is the speed x264 can read from the script.

[poisondeathray]

Ok. Is there a software like avsmeter which can calculate the encoding speed of my avs script in x264?

How about running a test encode with avs + x264 with your specific settings

[Groucho2004]

Ok. Is there a software like avsmeter which can calculate the encoding speed of my avs script in x264?

How about running a test encode with avs + x264 with your specific settings

Too obvious.

[x264]

Well it was not too obvious for me . The fps at which x264 encodes is much slower than that what i get when i run the script in avsmeter.

[Selur]

Surprise, x264 too needs cpu power for encoding, who would have thought that.
And to state another obvious fact: encoding the script can't get faster than decoding the script,..

[x264]

How do i encode an avs script with the same x264 settings, without having to type the same x264 code everytime?

x264 --preset placebo --crf 17.0 --qcomp 0.7 --aq-strength 0.7 --psy-rd 0.7:0.2 -o "encode.mkv"

i would like to use the same code for different avs files.

[Selur]

use a gui which supports profiles and learn to use it
or
learn how to write a batch script and write a script that does what you want
or
learn a programming language and write a small program that does what you want,..

[x264]

Could you show me how to write a batch script?

[Selur]

Nope, my experience writing batch scripts under Windows are minimal at best, but it's not really hard to understand and with a little effort you can find some examples through the forum search and modify them to your needs.

[x264]

SMdegrain has a parameter called tr(temporal radius). Will increasing the value for tr increase the quality of the denoising?

[Selur]

from the SMDegran script:

### tr [int: 1, 2, 3] 
### --------------
### Temporal radius. Select between MDegrain 1, 2 or 3. Higher is better, but also much slower.
### Default is 2.

see: http://forum.doom9.org/showthread.php?t=152326

[Groucho2004]

Could you show me how to write a batch script?

Here is a simple example:

cls
@echo off
echo.
SET ENCODER=E:\Apps\VideoTools\x264\x264.exe
SET SOURCE=F:\Test\test.avs
SET STATS=F:\Test\test.stats
SET TARGET=F:\Test\test.264
SET BITRATE=6000


SET PASS1="%SOURCE%" --bitrate %BITRATE% --profile high --level 4.0 --bluray-compat --tune film --colorprim "bt709" --transfer "bt709" --colormatrix "bt709" --sar 1:1 --b-pyramid none --b-adapt 2 --no-fast-pskip --no-dct-decimate --pic-struct --vbv-bufsize 22000 --vbv-maxrate 24000 --keyint 24 --ipratio 1.1 --direct auto --threads auto --thread-input --pass 1 --slow-firstpass --subme 3 --ref 4 --me hex --trellis 0 --stats "%STATS%" --output nul

SET PASS2="%SOURCE%" --bitrate %BITRATE% --profile high --level 4.0 --bluray-compat --tune film --colorprim "bt709" --transfer "bt709" --colormatrix "bt709" --sar 1:1 --b-pyramid none --b-adapt 2 --no-fast-pskip --no-dct-decimate --pic-struct --vbv-bufsize 22000 --vbv-maxrate 24000 --keyint 24 --ipratio 1.1 --direct auto --threads auto --thread-input --pass 2 --subme 9 --ref 6 --me umh --trellis 1 --stats "%STATS%" --output "%TARGET%"

"%ENCODER%" %PASS1%
echo.
"%ENCODER%" %PASS2%

[Selur]

FOR %%A IN (*.avs) DO x264 --preset placebo --crf 17.0 --qcomp 0.7 --aq-strength 0.7 --psy-rd 0.7:0.2 --output "%%~encode.mkv" "%%~A"

should also work as batch (not sure about the %)

[Groucho2004]

FOR %%A IN (*.avs) DO x264 --preset placebo --crf 17.0 --qcomp 0.7 --aq-strength 0.7 --psy-rd 0.7:0.2 --output "%%~encode.mkv" "%%~A"

should also work as batch (not sure about the %)

Oh, that's what he means by "same code for different avs files".

[x264]

Thanks for the script.

[Selur]

like I wrote, I'm not sure if each %% should be replaced by a single % instead, but try&error should easily solve that.

[poisondeathray]

for a batch file (.bat) it's "%%", for command line prompt it's "%"