Decomb39 Speed?

mmgrover · 30th August 2002, 14:35

I was just wondering if anbody else noticed a speed decrease with
Decomb39?

Using:
Telecide()
Decimate()

I was able to get about a speed of 0.800 - 0.900 in CCE using Decomb38. With Decomb39 the best I get is 0.200 max?

Any Ideas?

mike

Synth · 30th August 2002, 15:46

Try using "SetMemoryMax(40)" in your avs script (minus quotes).

Higher values than 40 give me increased speed but suck up the system memory rather quickly.

Assumes your using avisynth 2.x series.

Guest · 30th August 2002, 16:12

The only explanation is the SetMemoryMax(), as Synth said. What version of Avisynth are you using?

Also, please get Decomb 3.91. It has an important fix in Decimate().

mmgrover · 30th August 2002, 18:30

What would be the recomended amount for SetMemoryMax() with a
machine that has 1.5 gig of ram?

I have a P4 2.2 Gig with 4 Seagate 70 SCSI drives at home.

mg

Guest · 30th August 2002, 20:22

I'll let dividee handle this query. I am not familiar enough with the internals of Avisynth to answer usefully. I have mine set to 100Meg, however, as I like having a lot of frame cache.

dividee · 30th August 2002, 21:43

A minimum amount of memory is needed for every script to run at full speed. With more, you gain nothing. Unless you do very complicated scripts, a few dozen MB is usually enough. But with so much memory at hand, set it at 256 MB and forget about it.
In 2.05 and future versions (and in pre-1.0b6), you don't need to use SetMemoryMax (unless you want to use less memory) as it will use much more memory by default.

mmgrover · 2nd September 2002, 00:48

I tried using "SetMemoryMax(100)" with AVISynth 2.05.
Viewing the avs file in MediaPlayer it looks ok, but when
the avs file is encoded with CCE, all I get is a solod black
frames with some red lines at the bottom?

mike

Guest · 2nd September 2002, 01:21

Your first post implied that you were working fine with CCE.

If you remove the SetMemoryMax(), does it work OK (but slow), or has something else changed in the meantime?

Sounds like you are mixing up symptoms here and getting us all confused.

jdobbs · 2nd September 2002, 03:41

@mmgrover

I tried Decomb39 briefly and experienced similar (large) speed drops. I stepped back to the previous version. I made the assumption it was because of the Pentium specific enhancements (I'm using an Athlon TBird processor).

What type of processor are you using?

jdobbs

int 21h · 2nd September 2002, 03:55

I, too, have noticed these speed problems, even with SetMemoryMax set to the recommended values. However, I am running a P4. I simply rolled back to 1b5 or whatever the heck I had before and the speed was back to normal.

However, I traced my problems back to new Avisynth.

mmgrover · 2nd September 2002, 04:20

I was trying the SetMemoryMax(100) to help speed up Decomb391.
As I had stated, Decomb391 runs considerably slower than
Decomb3.8.

jdobbs, I am using a P4 2.2 gig with 1.5 gig of ram...

Trying different versions of AVISynth had no affect on the speed
of Decomb391.

I did find a filter called IVTC.

Speed results using AVISynth and Decomb -> CCE:

Decomb3.91 0.180 - 0.200
Decomb3.8 0.870 - 0.878
IVTC 1.120 - 1.200

IVTC also worked on a DVD I have called Titanic.

mike

Guest · 2nd September 2002, 05:25

This all makes no sense. There is no Pentium-specific code and I have a Palamino 1900. My tests show no slowdown from Decomb 3.8 to 3.91 and
the only change was addition of mode 2 to Decimate.

Has anyone that claims this slowdown even with SetMemoryMax() tried it with Decimate(mode=0)? Has anyone tried to isolate the "problem" to Telecide() or Decimate()? Does the slowdown occur only when serving into CCE, or when playing the AVS?

Peters · 2nd September 2002, 12:26

No speed decrease for me with the new version.
I'm just using Telecide(), encoding with Virtualdub

Avisynth 2.05, Athlon XP 1.8 ghz

jdobbs · 2nd September 2002, 13:20

@neuron2

As a test, I just ran two identical scripts on the same source. The only thing I changed is from one .DLL to the other (decomb38 and decomb39). Here are the two scripts:

------
LoadPlugin("C:\PROGRAM FILES\DVD-RIP\AVISYNTH\MPEG2DEC.DLL")
LoadPlugin("C:\PROGRAM FILES\DVD-RIP\AVISYNTH\DECOMB38.DLL")
mpeg2source("d:\image2\stng0109.d2v")
trim(0,2000)
Telecide()
Decimate(cycle=5)
BilinearResize(352,480)
ResampleAudio(44100)
------
LoadPlugin("C:\PROGRAM FILES\DVD-RIP\AVISYNTH\MPEG2DEC.DLL")
LoadPlugin("C:\PROGRAM FILES\DVD-RIP\AVISYNTH\DECOMB39.DLL")
mpeg2source("d:\image2\stng0109.d2v")
trim(0,2000)
Telecide()
Decimate(cycle=5)
BilinearResize(352,480)
ResampleAudio(44100)
------

On the first script my speed indicator was .636 on the second it was .241 -- it dropped to less than half its version 38 speed.

I'm running CCE version 2.50 on a 1.3Ghz TBird Processor on an ASUS AV7 motherboard. I have 512MB of memory, and I'm using an ATA100 60GByte hard drive. The source was NTSC (STNG Episode 9 from year 1)

Hope that helps.

jdobbs

jdobbs · 2nd September 2002, 13:30

The problem is definitely related to DECIMATE. If I comment that line out, the speeds are identical. If I comment out TELECIDE and only run DECIMATE the speed comparison is 1.05 to .422

Guest · 2nd September 2002, 13:46

@jdobbs

Thank you for the test results. What version of Avisynth were you running with?

Please do two things for me. PLEASE!

1. Try exactly as before but use Decimate(mode=0).

2. Try comparisons as before but not feeding into CCE, just playing the AVS.

jdobbs · 2nd September 2002, 14:21

@neuron2

AVISynth version shows at 2.0.4.0

1. Tried with decimate(mode=0) -- DECOMB38 for .628 and DECOMB39 got .640 --> pretty close.

2. It's hard to tell anything by using Media Player, so I ran the original scripts through VirtualDub converting to DIVX to take CCE out of the equation. On DECOMB38 I get 11-13fps, on DECOMB39 I get 4-6fps. Pretty much the same results.

jdobbs

dividee · 2nd September 2002, 14:40

@jdobbs:
With Avisynth 2.04 you should DEFINITELY use SetMemoryMax !

jdobbs · 2nd September 2002, 14:45

@dividee

Thanks, that must be it. I just switched to version 2.0.5.0 and the problem went away. I get virtually identical speeds using the scripts I posted above.

@neuron2

That's what I get for not staying current... I appreciate your help.

jdobbs

WarpEnterprises · 2nd September 2002, 15:22

Can confirm the SetMem-cause. Decimate is a quite good test for how much mem is allocated by default

Else there is identical speed no regard which settings.

Btw a good test for speed of a filter is to crop the video right afterwards to e.g. 8x8 and save this in VD as AVI uncompressed:

Decimate(mode=0, cycle=25)
Crop(0,0,8,8)

30th August 2002, 14:35	#1 \| Link
mmgrover Custom User Text: Join Date: Aug 2002 Posts: 161	Decomb39 Speed? I was just wondering if anbody else noticed a speed decrease with Decomb39? Using: Telecide() Decimate() I was able to get about a speed of 0.800 - 0.900 in CCE using Decomb38. With Decomb39 the best I get is 0.200 max? Any Ideas? mike

30th August 2002, 21:43	#6 \| Link
dividee Registered User Join Date: Oct 2001 Location: Brussels Posts: 358	A minimum amount of memory is needed for every script to run at full speed. With more, you gain nothing. Unless you do very complicated scripts, a few dozen MB is usually enough. But with so much memory at hand, set it at 256 MB and forget about it. In 2.05 and future versions (and in pre-1.0b6), you don't need to use SetMemoryMax (unless you want to use less memory) as it will use much more memory by default. __________________ dividee

2nd September 2002, 05:25	#12 \| Link
Guest Guest Join Date: Jan 2002 Posts: 21,901	This all makes no sense. There is no Pentium-specific code and I have a Palamino 1900. My tests show no slowdown from Decomb 3.8 to 3.91 and the only change was addition of mode 2 to Decimate. Has anyone that claims this slowdown even with SetMemoryMax() tried it with Decimate(mode=0)? Has anyone tried to isolate the "problem" to Telecide() or Decimate()? Does the slowdown occur only when serving into CCE, or when playing the AVS? Last edited by Guest; 2nd September 2002 at 05:30.

2nd September 2002, 14:21	#17 \| Link
jdobbs Moderator Join Date: Oct 2001 Posts: 20,975	@neuron2 AVISynth version shows at 2.0.4.0 1. Tried with decimate(mode=0) -- DECOMB38 for .628 and DECOMB39 got .640 --> pretty close. 2. It's hard to tell anything by using Media Player, so I ran the original scripts through VirtualDub converting to DIVX to take CCE out of the equation. On DECOMB38 I get 11-13fps, on DECOMB39 I get 4-6fps. Pretty much the same results. jdobbs Last edited by jdobbs; 2nd September 2002 at 14:24.

2nd September 2002, 14:40	#18 \| Link
dividee Registered User Join Date: Oct 2001 Location: Brussels Posts: 358	@jdobbs: With Avisynth 2.04 you should DEFINITELY use SetMemoryMax ! __________________ dividee

30th August 2002, 15:46	#2 \| Link
Synth Registered User Join Date: Feb 2002 Posts: 60	Try using "SetMemoryMax(40)" in your avs script (minus quotes). Higher values than 40 give me increased speed but suck up the system memory rather quickly. Assumes your using avisynth 2.x series.

30th August 2002, 16:12	#3 \| Link
Guest Guest Join Date: Jan 2002 Posts: 21,901	The only explanation is the SetMemoryMax(), as Synth said. What version of Avisynth are you using? Also, please get Decomb 3.91. It has an important fix in Decimate().

30th August 2002, 18:30	#4 \| Link
mmgrover Custom User Text: Join Date: Aug 2002 Posts: 161	What would be the recomended amount for SetMemoryMax() with a machine that has 1.5 gig of ram? I have a P4 2.2 Gig with 4 Seagate 70 SCSI drives at home. mg

30th August 2002, 20:22	#5 \| Link
Guest Guest Join Date: Jan 2002 Posts: 21,901	I'll let dividee handle this query. I am not familiar enough with the internals of Avisynth to answer usefully. I have mine set to 100Meg, however, as I like having a lot of frame cache.

2nd September 2002, 00:48	#7 \| Link
mmgrover Custom User Text: Join Date: Aug 2002 Posts: 161	I tried using "SetMemoryMax(100)" with AVISynth 2.05. Viewing the avs file in MediaPlayer it looks ok, but when the avs file is encoded with CCE, all I get is a solod black frames with some red lines at the bottom? mike

2nd September 2002, 01:21	#8 \| Link
Guest Guest Join Date: Jan 2002 Posts: 21,901	Your first post implied that you were working fine with CCE. If you remove the SetMemoryMax(), does it work OK (but slow), or has something else changed in the meantime? Sounds like you are mixing up symptoms here and getting us all confused.

2nd September 2002, 03:41	#9 \| Link
jdobbs Moderator Join Date: Oct 2001 Posts: 20,975	@mmgrover I tried Decomb39 briefly and experienced similar (large) speed drops. I stepped back to the previous version. I made the assumption it was because of the Pentium specific enhancements (I'm using an Athlon TBird processor). What type of processor are you using? jdobbs

2nd September 2002, 03:55	#10 \| Link
int 21h Still Laughing Join Date: Oct 2001 Location: Around Posts: 1,312	I, too, have noticed these speed problems, even with SetMemoryMax set to the recommended values. However, I am running a P4. I simply rolled back to 1b5 or whatever the heck I had before and the speed was back to normal. However, I traced my problems back to new Avisynth.

2nd September 2002, 04:20	#11 \| Link
mmgrover Custom User Text: Join Date: Aug 2002 Posts: 161	I was trying the SetMemoryMax(100) to help speed up Decomb391. As I had stated, Decomb391 runs considerably slower than Decomb3.8. jdobbs, I am using a P4 2.2 gig with 1.5 gig of ram... Trying different versions of AVISynth had no affect on the speed of Decomb391. I did find a filter called IVTC. Speed results using AVISynth and Decomb -> CCE: Decomb3.91 0.180 - 0.200 Decomb3.8 0.870 - 0.878 IVTC 1.120 - 1.200 IVTC also worked on a DVD I have called Titanic. mike

2nd September 2002, 12:26	#13 \| Link
Peters Registered User Join Date: Oct 2001 Location: France Posts: 138	No speed decrease for me with the new version. I'm just using Telecide(), encoding with Virtualdub Avisynth 2.05, Athlon XP 1.8 ghz

2nd September 2002, 13:20	#14 \| Link
jdobbs Moderator Join Date: Oct 2001 Posts: 20,975	@neuron2 As a test, I just ran two identical scripts on the same source. The only thing I changed is from one .DLL to the other (decomb38 and decomb39). Here are the two scripts: ------ LoadPlugin("C:\PROGRAM FILES\DVD-RIP\AVISYNTH\MPEG2DEC.DLL") LoadPlugin("C:\PROGRAM FILES\DVD-RIP\AVISYNTH\DECOMB38.DLL") mpeg2source("d:\image2\stng0109.d2v") trim(0,2000) Telecide() Decimate(cycle=5) BilinearResize(352,480) ResampleAudio(44100) ------ LoadPlugin("C:\PROGRAM FILES\DVD-RIP\AVISYNTH\MPEG2DEC.DLL") LoadPlugin("C:\PROGRAM FILES\DVD-RIP\AVISYNTH\DECOMB39.DLL") mpeg2source("d:\image2\stng0109.d2v") trim(0,2000) Telecide() Decimate(cycle=5) BilinearResize(352,480) ResampleAudio(44100) ------ On the first script my speed indicator was .636 on the second it was .241 -- it dropped to less than half its version 38 speed. I'm running CCE version 2.50 on a 1.3Ghz TBird Processor on an ASUS AV7 motherboard. I have 512MB of memory, and I'm using an ATA100 60GByte hard drive. The source was NTSC (STNG Episode 9 from year 1) Hope that helps. jdobbs

2nd September 2002, 13:30	#15 \| Link
jdobbs Moderator Join Date: Oct 2001 Posts: 20,975	The problem is definitely related to DECIMATE. If I comment that line out, the speeds are identical. If I comment out TELECIDE and only run DECIMATE the speed comparison is 1.05 to .422

2nd September 2002, 13:46	#16 \| Link
Guest Guest Join Date: Jan 2002 Posts: 21,901	@jdobbs Thank you for the test results. What version of Avisynth were you running with? Please do two things for me. PLEASE! 1. Try exactly as before but use Decimate(mode=0). 2. Try comparisons as before but not feeding into CCE, just playing the AVS.

2nd September 2002, 14:45	#19 \| Link
jdobbs Moderator Join Date: Oct 2001 Posts: 20,975	@dividee Thanks, that must be it. I just switched to version 2.0.5.0 and the problem went away. I get virtually identical speeds using the scripts I posted above. @neuron2 That's what I get for not staying current... I appreciate your help. jdobbs

2nd September 2002, 15:22	#20 \| Link
WarpEnterprises C64 Join Date: Apr 2002 Location: Austria Posts: 830	Can confirm the SetMem-cause. Decimate is a quite good test for how much mem is allocated by default Else there is identical speed no regard which settings. Btw a good test for speed of a filter is to crop the video right afterwards to e.g. 8x8 and save this in VD as AVI uncompressed: Decimate(mode=0, cycle=25) Crop(0,0,8,8)