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How to convert a 4:2:2 chroma sub-sampling video to a 4:2:0 video?

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Pavan Bhat
How to convert a 4:2:2 chroma sub-sampling video to a 4:2:0 video?
on Oct 3, 2016 at 4:16:01 pm

Hi all,

My film master is at 25 fps, 4:2:2 chroma sub-sampling ratio, 1080i, Apple Pro-res 422 Proxy with stereo audio. I am currently faced with a requirement from a TV network, which has stated the following specs for delivery -

25 fps, 4:2:0 chroma sub-sampling ratio, 1080i, H.264 mov file with stereo audio.

My question is as follows - How to change the chroma sub-sampling ratio? Is there an option on Final Cut Pro 7 for the same? Or do I use a third party software like MPEG STREAMCLIP or any such software? Any leads would be very much appreciated. Thanks in advance.

Regards,
Pavan Bhat
Film and TV Editor,
Mumbai, India


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Dave LaRonde
Re: How to convert a 4:2:2 chroma sub-sampling video to a 4:2:0 video?
on Oct 3, 2016 at 6:03:15 pm
Last Edited By Dave LaRonde on Oct 3, 2016 at 11:28:54 pm

The export to H.264 will change the chroma to 4:2:0. Export the sequence in ProRes 422, then Use Compressor on the exported file to transcode to H.264.

I can't say what will happen with the interlacing because there is no interlacing in H.264 -- it's progressive only.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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