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24p to H.264
Hello –
I’m exporting a project that was shot in 24p normal and captured at NTSC 30fps. Everything looks fine until I try and export to h.264 (for web delivery) and then I get that nasty effect where the interlacing shows up and things in motion seem to split off at the scan lines. I’m not sure if this is a product of interlacing the files or de-interlacing the files. Either way however, when checking and un-checking the de-interlace option I get the same effect. Reading up on the web I get the impression that this has to do with the fact that I shot 24p and captured 30fps. Does this sound right? Would exporting at a lower frame rate such as 12fps (or even 24) correct this? Or would I have to recapture at 23.97(or whatever that frame rate is)? Or is this a totally different issue?
Thanks
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4 Replies
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have you tried looking at it on another monitor?
Many have noticed that a Mac with a crt will show
interlace artifacts more often then not, yet they
will not show on a flat panel or a pc. -
I haven’t but I am viewing it on a laptop screen so I don’t think that would be an issue.
I’ve been looking around I’m fairly certain its a frame rate problem. I’m going to try exporting at 24fps and hope this will get rid of the interlacing. I forgot to mention that there was a significant amount of jerkiness to the footage that is probably also a result of frame rate. I have this feeling that exporting at 30fps is adding frames and thus the interlacing which in 24p shouldn’t be there to begin with.
Thanks for the suggestion
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Right click the sequence itself in the bin and look at its settings.
I’ve found that I often have to set the sequence’s field dominance to “none” AND pick the de-interlace option in the quicktime export.
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If you shot in 24p (not 24p advanced), you can use Cinema tools to do a reverse telecine on the footage and save 23.98 versions of the clips which you can then edit in a 23.98 FCP timeline. You’ll need to do the reverse telecine for each separate clip captured, so it may be a time-consuming process.
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