cce question

[Lev]

hey guys,

I'm trying to decode a pal dvd with cce.
dvd2avi says the source is interlaced but i don't see any interlacing lines when i let it run with Field Operation at None

this is what bitrate says about the source:

Pic. structure: Frame
Field topfirst: Yes
DCT type: Field
Quantscale: Linear
Scan type: ZigZag
Frame type: Interlaced

what mpeg2 video settings should i use here:

http://www.doom9.org/mpg/images/cce-videosettings.gif

i hope you guys can help me out.
thnx in advance!

[auenf]

if you cant see the scanlines, then it is probably not interlaced, but the flag was set to interlaced when encoded originally. the interlaced flag doesnt matter as much for PAL, set it to progressive frames if you want, will end up looking better on some highend sets, and should be fine still on interlaced equipment.

Enf...

[Lev]

thnx auenf

what about zigzag scanning order and upper field first?

[auenf]

dont alter the field order, altho if its progressive, i WONT do anything, zig zag doesnt matter, not sure exaclty what its benefits are actually ;)

Enf...

[guboogi]

i also had a question about the field order.

even though bitrate viewer says "top field first" and the image has "top field first" as UNchecked, you still say not to change it? is bitrate viewer wrong? or does it really not matter what you check in CCE?

in one of the doom9 guides it says to check field order by opening TMPG and loading your d2v project. you set a field order, go to deinterlace and run a filter and see if the motion is jumpy. if it is, you switch field order and check again. is THIS the way to determine field order (rather than simply using bitrate viewer) or what? thanks.

[mikeathome]

Originally posted by auenf
dont alter the field order, altho if its progressive, i WONT do anything, zig zag doesnt matter, not sure exaclty what its benefits are actually ;)

Enf...

Hi,

set the Scan Order to ZigZag for ALL Progressive material together with a Standard MPEG Matrix (e.g. in CCESP), this ensures optimal alignment of the quantization matrix to the ScanOrder (the way the encoder uses the factors from the matrix, it's scans zigzag thru the matrix, so the factors should be aligned like that, that need to match! otherwise you loose quality, bandwidth (sharpness) cut off).

Set it to Alternate for (REAL) Interlaced material AND use the mb1 'DV interlaced' matrix for real great appearance. Alternate scan order has to be used to pay attention to the 'special' interlace characteristic of the images. The mb1 matrix has been set this way !

Try to avoid matrixes with lot's of '99'. They cut off bandwidth (may be usefull for SVCD re-encoding, for size reasons).

For Progressive, Fieldorder doesn't matter, for Interlaced it's tricky, right fieldorder can be checked ONLY if you route your content to a REAL interlaced playback device, a TV e.g (from the PC thru a MPEG card). You can change the fieldorder AFTER encoding using the EasyChanger or Restream or pulldown.exe. Wrong Fieldorder results in real nasty playback, jumping (the wrong field in a motion scene is played first, so picture's motion jumps back and forth).

mike