CCE Guide...Confused

[ron spencer]

So I thought I would look at the CCE guides....in particular interlaced NTSC stuff, which I have.

So I looked at the CCE FAQ at: http://forum.doom9.org/showthread.php?s=&threadid=53770


and the CCE Basic Guide at: http://www.doom9.org/mpg/ccebasic27.htm

Now the FAQ says regarding the Upper Field First options:

So here is the rule of thumb: Always uncheck "Upper Field First" unless your video is interlaced AND bottom field first.

But the CCD Basic Guide says:

Keep Output top field first stream checked unless you have a bottom field first stream (rare and normally only interlaced content).


these are inconsistent....anyone know what you are supposed to do with interlaced NTSC content, which is bottom field first...should you check it or not?

Thanks

[bigotti5]

There is a difference between "Upper Field First" and "Output top field first stream"

Since CCE 2.7 SP (Basic 2.69) is capable of TFF and BFF output.

Prior versions can only output TFF, therefore any BFF stream has to be shifted up one line by checking "Upper Field First" (Fieldorder is changed from BFF in input stream to TFF in output stream).
The "Upper Field First" option has been renamed in 2.67 and later to "Offset line".

"Output top field first stream" is responsible if the output is TFF or BFF.

If you have BFF input and want to have BFF output (only possible with 2.70SP and later respectively Basic 2.69 and later) you have to uncheck "Output top field first stream" and set "offset line" to 0.

In prior versions you cant have BFF output therefore you have (for BFF input) to check "Upper Field First" or in 2.67SP set "offset line" to 1.

[ron spencer]

ok....but the CCE Basic Guide (written in August 2005 so presumably with V2.70) says:

Keep Output top field first stream checked unless you have a bottom field first stream (rare and normally only interlaced content).


and this agrees with you....but it then says:

The Offset line is a source of much confusion. It should always be set to 0, unless you're dealing with interlaced bottom field first content (in which case it should be set to 1).

which is different from what you said, which is to set the offset to 0. Does this mean the guide is wrong?...just trying to figure this all out...

thanks for your posts!!!!

[bigotti5]

This is what the guide says

Output top field first stream

Specify the output field order. If it is selected, an output stream
is top field first. If not, an output is bottom field first. This
setting works on MPEG-2 output.

It is important to set correct field order, because incorrect field
order causes stuttered motion. To set field order correctly, you
have to care about Offset line setting.

If the field order is same between the source and the output,
Offset line should be 0 or even number.

If the field order is different between the source and the
output, Offset line should be 1 or odd number.

Offset line

This parameter specifies offset lines from which encoding starts.
When the output is MPEG-2 video, it affects on field order. If
this setting is incorrect, the movement of an encoded video will
be jerky. Please be careful about both field orders of output
and source material.