Re: Can You show me the advantages please ?

I noticed AE CS3 improved that option and on certain shots the Deinterlacer will provide similar results yes , AE is actually more virtuous in terms of workflow in that domain then most applications (eg Premiere) as it supports comps of various frame rates... We're perfectly happy if you need this only 10% of the time.

That said of the top of my head consider:
- Exposure of all controls so you can tweak it to your taste.
- Available as an effect so (in combination with the other tools in FieldsKit) you can deal with complicated special cases elegantly, or workflow where you might want to process before deinterlacing, process lower and upper clips as separate sequence or combine this with other tools as discussed in a thread below (before or after). A dumb example would be a green screen shot which you might want to prekey before deinterlacing if you have fine objects... ETC
- Minor: Allow you to view fields in an AE comp (by turning on or off effect)
- Animatable (so you can deal with things like cadence change or transcoding error, handle cut points)...
- Support for motion estimation mode (not always worth it given it takes much more time, but an hardware box like Teranex charges a premium just for that option)

Pierre