Converting 60p to 60i??

shoopdabloop · 3rd June 2009, 03:10

I thought it would be simple, but I cannot for the life of me figure out how to convert progressive 60p video to 60i.

If this topic gets deleted before anyone gets a chance to reply, it'll be because I found out how to do it myself.

bsmith1593 · 3rd June 2009, 03:18

I'm not sure how to interlace in AviSynth, but if you user VirtualDub 1.9.1, there is a video filter called "interlace," which interlaces the video.

shoopdabloop · 3rd June 2009, 03:22

thanks, but i really want to do it in avisynth because then i get to fast recompress.

LocalH · 3rd June 2009, 03:23

Use the following script to do this (this also works for PAL material): This script was taken from this thread except I modified the comments to refer to NTSC instead of PAL.

Code:

AssumeFrameBased()
ConvertToYUY2() # scharfis_brain suggests this due to possible chroma error
AssumeTFF() # change this to AssumeBFF() if you need bottom field first
SeparateFields() # 60 frames becomes 120 fields
SelectEvery(4, 0, 3) # 120 fields to 60 fields (selects 2 from 4)
Weave() # 60 fields to 30 interlaced frames

Edit: Forgot to add the Assume?FF() line as it does affect how the frames are separated into field, choose the one you need for your media type (TFF, BFF, or choose one if it doesn't matter to you).

shoopdabloop · 3rd June 2009, 03:31

sweet! thanks.
i needed to interlace something so i could test out TDeint+EEDI2.

Alex_ander · 3rd June 2009, 05:19

Another way:

Code:

ConvertToYUY2()
AssumeBFF()# opposite to the desired output field order
DoubleWeave()
SelectEvery(4,1)# TFF here

2Bdecided · 3rd June 2009, 09:49

Quote:

ConvertToYUY2() # scharfis_brain suggests this due to possible chroma error

I've found working in YV12 throughout is faultless - there's no error to avoid.

(ready to be proved wrong, but I used critical test images and looked for the error, and it just isn't there).

What you do need to do is vertically soften the image a little to prevent inter-line twitter.

Cheers,
David.

Alex_ander · 3rd June 2009, 15:00

ConvertToYUY2() is mainly recommended for encoding with CCE or Canopus since they both start encoding from YUY2, unlike old TMPG, which wants RGB24.

3rd June 2009, 03:10	#1 \| Link
shoopdabloop Registered User Join Date: Mar 2009 Posts: 166	Converting 60p to 60i?? I thought it would be simple, but I cannot for the life of me figure out how to convert progressive 60p video to 60i. If this topic gets deleted before anyone gets a chance to reply, it'll be because I found out how to do it myself.

3rd June 2009, 03:23	#4 \| Link
LocalH Registered User Join Date: Mar 2005 Posts: 135	Use the following script to do this (this also works for PAL material): This script was taken from this thread except I modified the comments to refer to NTSC instead of PAL. Code: AssumeFrameBased() ConvertToYUY2() # scharfis_brain suggests this due to possible chroma error AssumeTFF() # change this to AssumeBFF() if you need bottom field first SeparateFields() # 60 frames becomes 120 fields SelectEvery(4, 0, 3) # 120 fields to 60 fields (selects 2 from 4) Weave() # 60 fields to 30 interlaced frames Edit: Forgot to add the Assume?FF() line as it does affect how the frames are separated into field, choose the one you need for your media type (TFF, BFF, or choose one if it doesn't matter to you). Last edited by LocalH; 3rd June 2009 at 03:27.

3rd June 2009, 05:19	#6 \| Link
Alex_ander Registered User Join Date: Apr 2008 Location: St. Petersburg, Russia Posts: 337	Another way: Code: ConvertToYUY2() AssumeBFF()# opposite to the desired output field order DoubleWeave() SelectEvery(4,1)# TFF here

3rd June 2009, 03:18	#2 \| Link
bsmith1593 Registered User Join Date: May 2009 Posts: 24	I'm not sure how to interlace in AviSynth, but if you user VirtualDub 1.9.1, there is a video filter called "interlace," which interlaces the video.

3rd June 2009, 03:22	#3 \| Link
shoopdabloop Registered User Join Date: Mar 2009 Posts: 166	thanks, but i really want to do it in avisynth because then i get to fast recompress.

3rd June 2009, 03:31	#5 \| Link
shoopdabloop Registered User Join Date: Mar 2009 Posts: 166	sweet! thanks. i needed to interlace something so i could test out TDeint+EEDI2.

3rd June 2009, 15:00	#8 \| Link
Alex_ander Registered User Join Date: Apr 2008 Location: St. Petersburg, Russia Posts: 337	ConvertToYUY2() is mainly recommended for encoding with CCE or Canopus since they both start encoding from YUY2, unlike old TMPG, which wants RGB24.