After re-encoding play time reduced from 45 min to 35 min, What am I doing wrong?

[MickeyNBK]

I am working on backing up my CSI season one discs. I'm using DoitFast4U 1.1.0, AviSynth 2.5 and CCE 2.66.01.07. Having the same issue with Robocop Dark Justice and Transilvania Twist (both have mixed content).

Dif4u is detecting the source as interlaced and creates the following AVS script:

--------------------------------------------------------------------
LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\mpeg2dec3.dll")

Mpeg2Source("VTS__01_P01.4~3_1.d2v")

LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\decomb.dll")

Telecide()

Decimate(cycle=5)

ConvertToYUY2()

addaudio()
---------------------------------------------------------------------

My settings in CCE are as following:

Timecode Setting: Frame# 0 00 00 00 00 DF is unchecked

Mpeg2 One Pass VBR

Quantization Factor and Bite Rate:
Q: 40 Min: 0 Max: 9800

3:2 Pulldown detection, Letterbox hint and Panscan all unchecked

Aspect Ratio 4:3

Video
GOP Sequence: M=3 N/M=4
SEQ Header every 1 GOPs
Add Sequence end Code: and Upperfield first: Checked

Lumanince Level 0 to 255
Framrate: 29.97
Quantization Matrices: Mpeg Standard
Packet Size: 2,048


Quality
Simple Setting: None Checked
Low Pass filter, Effect restricted verticle filter and Dithered Quantization all unchecked
Quantizer characteristics: 15
Intra block DC precision: 9
Block Scanning Order: Alternate (tried zig zag as well)
Progressive Frame Flag: Checked

Any idea why this is happening?

[waldok]

Something to do with pulldown ?
I'm no "NTSC" guy, but it seems the ratio between your original 45 minuts to the final 35 minutes is the same as the ratio between 29.97fps NTSC and 23.976 fps film.

Did you check this ?

Waldok

[MickeyNBK]

Since I'm encoding at 29.97 fps then I wouldn't do a pulldown. Here is what I'm finding out.

If you set Decimate(cycle=5) in your AVS script then open it in CCE, it will automaticly default to 23.976fps

If you set Decimate(mode=1) then CCE will default to 29.97fps.

I was trying to use Decimate(cycle=5) and setting fps to 29.97. Apparently you can't do this.

I'm still experimenting but it seems taking the default of 23.976 is going to fix my problem.