using filters before or after encoding?

[sinesurfr]

has anyone else noticed a bit of a difference in the video produced when changing the order of processing the filter in with the video? I noticed that in using the deinterlace filter in particular that the video becomes a bit more blurry compared to me loading the frame server made before encoding and adding the deinterlace filter to it. I'm just looking for an efficient way of producing the best video possible but I don't want to have to go through the whole process of reencoding when I can simply add a deinterlacer after encoding a movie that I mistakenly encoded without using the deinterlacer in the frame server. But at the same time, I also noticed that it actually might take longer to use the deinterlacer afterwards to fix the video compared to reencoding completely with the deinterlacer applied.

Please help. thanks.

[morsa]

What are you talking about????????

[sinesurfr]

I encoded an interlaced source without deinterlacing it in GKnot. So I thought maybe I could just fix it afterwards but my roommate told me that the deinterlacing process is best used before I encode, otherwise, I'll get some artifacts. But seeing as how I spent so much time encoding it, I thought there might be a shorter way to deinterlace it without starting from scratch. But upon seeing the preview window for the "fixed" version of the avi after applying the deinterlace filter, I realized that there's a little bluriness applied to the avi whereas when I opened up the avs of the movie with deinterlace on, I didn't notice this bluriness. I'm wondering if this is in my head or if this change is real. Thanks.

[stickboy]

Unless you're encoding a format that supports interlaced video, you definitely should deinterlace first, particularly before you do any spatial smoothing.

[sinesurfr]

what format would support interlacing? The source is an NTSC DVD which I was planning to play on my laptop. But from what I gather, I'm guessing you're saying that I should start from scratch and encode it with the filter enabled. thanks for your reply.

[morsa]

If you didn't deinterlaced your movie before encoding, then you can't fix it after or youl need to re-encode it and you'll end up with a degraded and blurrier image.
The only way to avoid reencoding in the case you've mentioned is using a directshow deinterlacing filter (ffdshow for example)

[stickboy]

Originally posted by sinesurfr
what format would support interlacing?MPEG2, xvid, and I assume DivX. Note that you specifically need to enable interlacing in the encode settings.