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ADV212: Delay in Video

Hi all,

I am using ADV212 for video compression.

I have read from adv212 FAQ that in encoder it takes 1.5 Filed delay and in decoder it takes

1.5 field.

it means  delay should be 3 filed( 60 MS). but i have observed more delay in video(around 1Sec).

what i am doing is that as i get field from encoder i fed  it to decoder without buffer.

Does image index play any role in delay or might be another factor?

I have doubt that in decoder first field should be odd with zero image index.

Is it like that or any other reason for it.

with regards