Mencoder: 25fps interlaced to progressive?

nexx · 20th January 2005, 08:51

I've recorded some content in 576i and 1080i via my HDTV card, and I'm after the best way to turn these into progressive movies when encoding to XviD.

I've done some research and tests and come to the following conclusions:

Since I plan on scaling the video down a lot (1920x1080 > 720x404), I should just discard one field (-field=0). But this results in jerkiness as half the fields are missing.

The alternative seems to be to display every field as a frame (-tfields=1 -fps 50 -ofps 50) - I end up with fluid motion but at twice the frame rate, requiring a much larger file for decent quality.

So it seems a compromise between fluidity and size, is there no way to get a fluid 25fps video out of this?

Any help appreciated

echo · 21st January 2005, 20:39

Try using "-vf lavcdeint". That works for me... Oh, and just as a reminder: first deinterlace, then resize.

nexx · 27th January 2005, 06:59

Thanks, it seems to be similar to the other deinterlace filters.
Anyway, right now im using kerndeint. I simply dont have enough hard drive space for 50fps high quality video right now

bennettp · 5th February 2005, 03:57

You could also try "-vf pp=lb", which works well with xvid and mpeg1 content. "-vf lavcdeint" generally works well with interlaced dvds.

20th January 2005, 08:51	#1 \| Link
nexx Registered User Join Date: Sep 2004 Location: Brisbane, Australia Posts: 74	Mencoder: 25fps interlaced to progressive? I've recorded some content in 576i and 1080i via my HDTV card, and I'm after the best way to turn these into progressive movies when encoding to XviD. I've done some research and tests and come to the following conclusions: Since I plan on scaling the video down a lot (1920x1080 > 720x404), I should just discard one field (-field=0). But this results in jerkiness as half the fields are missing. The alternative seems to be to display every field as a frame (-tfields=1 -fps 50 -ofps 50) - I end up with fluid motion but at twice the frame rate, requiring a much larger file for decent quality. So it seems a compromise between fluidity and size, is there no way to get a fluid 25fps video out of this? Any help appreciated Last edited by nexx; 20th January 2005 at 08:54.

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21st January 2005, 20:39	#2 \| Link
echo Registered User Join Date: Jan 2003 Posts: 130	Try using "-vf lavcdeint". That works for me... Oh, and just as a reminder: first deinterlace, then resize.

27th January 2005, 06:59	#3 \| Link
nexx Registered User Join Date: Sep 2004 Location: Brisbane, Australia Posts: 74	Thanks, it seems to be similar to the other deinterlace filters. Anyway, right now im using kerndeint. I simply dont have enough hard drive space for 50fps high quality video right now

5th February 2005, 03:57	#4 \| Link
bennettp Registered User Join Date: Dec 2004 Location: Queensland, Australia Posts: 2	You could also try "-vf pp=lb", which works well with xvid and mpeg1 content. "-vf lavcdeint" generally works well with interlaced dvds.