Quote:
Originally Posted by D-Dave
If I was working with footage from a DVD and my goal was to simply tidy up the footage and store the footage on a hard drive, would it be better to keep the SAR flags on the footage or to scale the footage to a square pixel resolution (720x480 to 853x480)? I'm not sure whether video players treat SAR flags any differently than video being scaled on a display. Now if I had footage (DVD, VHS, DV tapes) that will be upscaled to 1280x720, would it be a better decision to apply the filters before or after upscaling? In regards to the upscaling, would it be wise to use NNEDI3 to get the footage close to the desired resolution and then adjust with either Spline or Lanczos?
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If your DVDs are mastered correctly, that number is actually not perfectly accurate. It's pretty close though. For detailed information on aspect ratios in the SD realm, I recommend taking a look at
this site. As for the general question, I would just set the SAR flags and not scale the video to at all. If you are going to scale anyway, you could go either way though.
Quote:
Originally Posted by Sharc
If the footage is interlaced your first filter should be a deinterlacer, i.e. don't scale interlaced footage.
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Just make sure it isn't telecined before throwing a deinterlacer at it, as in that case you can actually restore the original progressive video by using an IVTC filter instead of having to use an interpolating deinterlacer.