View Full Version : Any NLEs that can deinterlace to double frame rate internally?
evilc
18th May 2008, 11:00
As in what the virtualdub / avisynth filter "Deinterlace Smooth" does - a "Bob+Weave" deinterlace.
Been using the vdub / avs method to do 25i to 50p for years, but I am having increasing problems with PPro CS3 getting the frameserve from avisynth method to work, and rendering em all out at double framerate is a ballache. I used to just edit with normal clips then do a "bait and switch" for AVS files but this is now unreliable and so I am seeking an NLE that can do all this automatically.
In case it makes any difference, I now need to do this with interlaced divx, not just DV AVI. A sample file is here (http://www.evilc.com/tmp/deint_smooth_me.avi)
Does anyone know an NLE that will do this internally?
evilc
20th May 2008, 13:14
Logging NLEs capable of doing this as I test them.
here (http://www.evilc.com/tmp/deint_smooth_me.avi) is a sample interlaced divx which I am using as a test. Should work with miniDV footage too. Unfortunately the sample divx is a bit poor quality as the camera was not set on the highest mode, but it is fine to determine if the smooth deinterlace worked.
Premiere Pro (All versions to CS3): FAIL.
Sony Vegas (Movie Studio Platinum): SUCCESS.
It seems that you must be careful with the "Prerender Video" or it will not work. Before you render, Tools->Clean Up Prerendered Video->Delete All if in doubt...
To replicate:
New Project, Name it, hit Next.
Tick "Make my project settings match this media file", Point it to deint_smooth_me.avi (http://www.evilc.com/tmp/deint_smooth_me.avi)
Drag deint_smooth_me.avi (http://www.evilc.com/tmp/deint_smooth_me.avi) to the timeline
Right click, Properties, set to 0.5x speed, click OK
Drag right edge of clip until first stop (ie so whole of file is playing, not just half)
Tools->Clean up... as detailed above
File->Make Movie, Select "Save to Hard Disk"->Next
Select (In this case) PAL DV, but change the "field order" to "None: Progressive scan"
Render out. Done! Notice that the 25FPS (interlaced) PAL movie is shown at half speed (but full framerate) with no blended frames. Lovely! +1 to Vegas!
Unfortunately it does not seem to stretch the audio as well, but I am sure this can be worked around.
A better route seems to be make a double rate (eg 50FPS for PAL) progressive project but render to a single rate (eg 25FPS for PAL) output. This results in slowmo and normal frames being free of frame blending, whereas I was getting blending occuring on regular rate frames with the above method.
Mediachance Edit Studio 6: PARTIAL SUCCESS
Currently I have an issue with it showing the wrong frame every ~ 30 frames, but there is a "Half Speed" option when you right click a clip and select speed. The only parameter is "Top field" or "Bottom field" so I guess this option is specifically for doing the deinterlace trick.
Blue_MiSfit
23rd May 2008, 02:35
I imagine Magic Bullet would do a nice job in Premiere. It's a pretty solid deinterlacing / filtering package that's wicked expensive.
Avisynth is free, but does a great job too :)
~MiSfit
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