Capture ProRes @ 720×480

[Rafael Amador]

All the NTSC 10b capture presets are 486.
They are supposed to be used to capture DigiBeta.
rafael

http://www.nagavideo.com

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[Gary Adcock]

[Philip Ohler] “you’re saying is 720×486 is ProRes’s native SD size and there’s no way of changing to 480?”

Correct.
you are capturing your SD as SMPTE R601 and the format size is 720×486

Why does it have to be 480? I do not understand.- prior to editing DV EVERYONE used 720×486 for the frame size. Any DVD’s you produce will automatically use the 720×480 frame size – that is the standard for the Mpg2 format( and the transmission standard also).

In an analog world those extra 6 lines carry VANC and LTC data for timing and ancillary data.
In the digital world those are included in the baseband video stream not as a separate carrier as it had to be in analog, hence the reason the digital capture formats are all listed as 720×480 and the baseband signal is 720×486.

gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows

Inside look at the IoHD
https://library.creativecow.net/articles/adcock_gary/AJAIOHD.php

[Gary Adcock]

[Rafael Amador] “Was just to experiment a little:-) “

but you did not think it thru.

any odd frame size would not allow you to handle the content outside of FCS, this is one of the biggest issues with software conversions from thin raster formats into ProRes. While the formats are usable within FCS2 if you go to shake, AE or other platform the content is not viewable.

ie: while you can create 960×720 ProRes content from a DVCPROHD file – the resulting PR file is not viewable anywhere else and will most likely not playback properly.

gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows

Inside look at the IoHD
https://library.creativecow.net/articles/adcock_gary/AJAIOHD.php

[Philip Ohler]

Gary,

The 480 issue is base on 1 big issue. Much of our content comes from DVDs, whether it be directors reels or commercial reels of spot from within our agency. DVD is 720×480. What we have found is importing this DVD content using MPEG Streamclip in the 486 frame size degrades the image because it is stretching the frame adding 4 lines to the top and 2 to the bottom. If we bring in at 480 everything is fine. What we don’t want is to have 2 different frame sizes between our imported DVD footage and our captured from tape footage. We would like to avoid the render time associated with this workflow. We have been able in the past to work in 480 using DVCPro50 for both import and capture. We’ve moved from FCS 1 to FCS 2 finally. Would like to shift to ProRes but if we can’t capture at 480 we might just stay in the DV world for SD.

Thanks for you insight.

Philip

[Gary Adcock]

[Philip Ohler] “Would like to shift to ProRes but if we can’t capture at 480 we might just stay in the DV world for SD. “

I didn’t say you could not do it.

if you create a custom capture for 480 ProRes- the content may not be usable anywhere outside the FCS suite. It sounds as if DV50 is fine for your work since the majority of your content is being converted from 8bit Mpeg2 content anyway.

gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows

Inside look at the IoHD
https://library.creativecow.net/articles/adcock_gary/AJAIOHD.php

[Sean Oneil]

It’s important to understand that Final Cut 6 (and 5) intelligently allows you to mix 480 and 486 footage in the same sequence (which can be either format). It crops or adds 4 lines at the top, 2 at the bottom. These are WELL within the overscan area so it’s trivial.

SDI video is 486, not 480. No reason to even capture ProRes or Uncompressed as 480. When you capture DV50, the DV50 codec REQUIRES it to be 480 so Final Cut crops it during capture. No reason to do that with ProRes.

ProRes does not have a requirement to be 486. You can export it to whatever size you want and I often transcode DV and DVD footage to ProRes 480. But when capturing SD-SDI there is never any reason, ever, to capture it any other size.

Sean