avc intra to prores file size

[Jeremy Garchow]

Yes, it does. ProRes SQ is 145mb/sec and HQ is 220mb/sec. AVC-I 1000 is, well, 100 mb/sec.

In the log and transfer window, you can choose a column that will how you the size of the current file (source) and then the size of the transcoded file (target). The column you want is the target file size.

sourcetarget2.png

Jeremy

[Shane Ross]

Import to ProRes. ProRes HQ really should only be used for sizes over 1920×1080, like 2K.

Shane

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[Jeremy Garchow]

[Shane Ross] “ProRes HQ really should only be used for sizes over 1920×1080, like 2K. “

I don’t know where that rumor started. It’s more about bit depth. If your native source footage is 10bit or higher, HQ is beneficial (like AVC-I for instance). But if your footage is 8bit then ProRes SQ will suffice. ProRes SQ will suffice for AVC-I too. I use it all the time.

https://provideocoalition.com/index.php/apple/story/prores_a_closer_look/

Jeremy

[Shane Ross]

But since BOTH versions of ProRes are 10-bit, why would it matter? I see ZERO difference between footage captured as ProRes vs ProRes HQ, from HDV source and from HDCAM source. So why eat up the extra drive space? HQ, High Quality, would be something that I’d use for the larger formats…that will no doubt be projected on a BIG SCREEN where the difference will be noticed. TV screen? ProRes is plenty good.

Shane

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[Jeremy Garchow]

[Shane Ross] ” I see ZERO difference between footage captured as ProRes vs ProRes HQ, from HDV source and from HDCAM source.”

Those are from tape. We are talking about software transcodes.

[Shane Ross] “TV screen? ProRes is plenty good. “

Agreed. Just pointing out the differences is all. I used to finish everything in 10 but Uncompressed. Did I need to? Probably not, did it look fantastic? Sure did. It wholly depends on your project, but I am still under the guise that less compression = better, especially for text graphics and cc. If you have a 10 bit native source and can stand the file size difference, HQ is okay. If your footage is 8 bit native, then it is unnecessary and sometimes detrimental.

Jeremy

[Walter Biscardi]

[Jeremy Garchow] “I don’t know where that rumor started. It’s more about bit depth. If your native source footage is 10bit or higher, HQ is beneficial (like AVC-I for instance”

Gary Adcock did a very detailed posting or article about this a while back.

If your format is larger than 10bit or larger than 1080 then HQ is beneficial. If you’re starting out with 10bit or lower, regular ProRes is what you should use.

I have had so many issues with HQ with digitizing from both DigiBeta and HD-SDI sources that we almost gave up completely on the ProRes format. Then Gary explained why this was happening.

Walter Biscardi, Jr.
Biscardi Creative Media
HD and SD Production for Broadcast and Independent Productions.

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[Jeremy Garchow]

Yes, the link I sent in a previous post goes over all those details.

AVC-I is a 10 bit native format. HQ is beneficial if you want it. I am not saying you have to use it, I am just saying you can.

Jeremy