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4:4:4 chroma requirements

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#1 Sinsear
When rendering a 4:4:4 video, does the source have to be TIFF? Or can you create a 4:4:4 chroma video out of JPEGs?
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#2 gwegner
Jpg is 8 bit only. So it would be better to use tiff to have any advantage when rendering in 444.
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#3 Sinsear
When exporting as JPEG (LRT JPG, ORI), what are the specifications of the JPEG file? Is the quality set to 70 or something?
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#4 Sinsear
Also, would JPEG be sufficient for 4:2:0 rendering?
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#5 gwegner
Normally yes, since you do all the color and contrast editing in Lightroom before you export...
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