for CCE user

[yup]

Hi folk!
Today I try filter ReverseFieldDominance() in Avisynth script for encode DV source (90sec)to MPEG-2 use CCE 2.66 and get interesting result. With use this filter and check tff in Video tab I get quantization level maximum 8.08 and average 6.91, but without and uncheck tff 8.54 and 6.95. I see result in BitrateViewer and think that CCE special tweaked on tff and during scene change Q level very high (CCE only remove firs field, I think) one field from one scene second from other.
May be this will be usefull for some user.
With kind regards yup.

[bb]

Which results do you get using DoubleWeave.SelectOdd()?

By the way: please post your script.

bb

[yup]

bb thank You for responce. Description method for encoding.
Method 1
Script
AVISource("digit.avi")# DV AVI
FixBrokenChromaUpsampling()
BitrateViewer result
CCE tff uncheck
Peak Q.level=8.12 Average Q.level=6.92
Method 2
Script
AVISource("digit.avi")# DV AVI
FixBrokenChromaUpsampling()
ReverseFieldDominance()
CCE tff check
BitrateViewer result
Peak Q.level=7.99 Average Q.level=6.88
Method 3
Script
AVISource("digit.avi")# DV AVI
FixBrokenChromaUpsampling()
DoubleWeave.SelectOdd()
BitrateViewer result
CCE tff check
CCE tff check
Peak Q.level=8.05 Average Q.level=6.87
BitrateViewer give difference result dependent from scale. I use free Canopus DV codec. Both approaches fith change field order improve video quality.
With kind regards yup.

[bb]

With the "DoubleWeave.SelectOdd()" the "Upper field first" flag in CCE should not be checked. Could you please test that, too? You should get lower average Q levels, because this is the way it's supposed to be.

If you encode with wrong field order, the encoder should "eat" more bitrate. Which encoding mode did you use? Constant quality, CBR, or VBR? I am interested in the other CCE settings, too.

bb

[yup]

Hi bb!
without tff checked Peak Q.level=8.03 Average Q.Level=6.92 little worst than use ReverseFieldDominance. Why? yup.

[yup]

bb i use standardt template in CCE. Difference only check or uncheck tff. yup.

[bb]

Maybe the video sequence is just too short to get reliable statistics. Can you try with a longer video, like five minutes?

bb