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exporting to unusual frame sizes?
this actually preceeds a fcp issue as i haven’t been able
to successfully create the clips i need to bring in to fcp.i’ve been trying to export (and import) a targa sequence
at 1024×682 (3:2). my qtpro won’t seem to accept this
size of frame. is that normal? as a workaround, i’ve tried
pre-rendering it on another box, a pc, into an avi file
and opening the avi in qtpro on that pc. the pc version
of qtpro won’t render the file either. it does open it, but
it won’t successfully render it out. btw, i’m trying to
render it in either animation or none codec.i’ve tried bringing all the targas directly into fcp but
that doesn’t render either. system is an intel macpro with
5gb memory.what i’ve found is that the only way i can work with this
imagery is to letterbox it into 4:3, adding black top and
bottom to bring the image to 1024×768. this, of course,
makes for a larger file, not to mention the unwanted top
and bottom black masking.is this normal? have i left something out here?
all help much appreciated,
BabaG -
3 Replies
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You could try to export a QT movie whith those dimensions in AE or Shake. For sure they will manage the sequences better than FC.[BabaG] “what i’ve found is that the only way i can work with this
imagery is to letterbox it into 4:3, adding black top and
bottom to bring the image to 1024×768. this, of course,
makes for a larger file, not to mention the unwanted top
and bottom black masking. “
If you have to keep exporting like that, export with Alpha channel. You will get smaller files and you don’t get the top and low black bands. If you want better quality that the one you get with the Animation codec, you can try Sheer or Microcosm.
Rafael -
Hi
The rule of thumb for creation of QuickTime movies has been that the pixel size should be divisible by 16.
As in 768/16=48.
Your 1024 dimension is fine, 1024/16=64, but your 682 dimension doesn’t comply, 682/16=42.625.The reason for this is the way the file is made up of macroblock segments:
https://en.wikipedia.org/wiki/MacroblockSome codecs can be sub-divided further, into 4×4 blocks, but even using one of these you will get a compression error with your choice of vertical pixel dimension, 682/4=170.5.
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There are many codecs that don’t use 16 pixels macroblocks.
The rule of the 1/16, do not work: 486/16 = 30’375 but is supported in QT.
Rafael
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