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different gamma when importing Uncompressed 10 bit HD

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Fermin Branger
different gamma when importing Uncompressed 10 bit HD
on May 4, 2010 at 7:45:50 pm

Hi, I have to work with Uncompressed 10 bit HD video but when I import it (to ProResHQ) I get the image with totally different gamma, Blacks and highlights hypercontrasted.
How can I work with this media without loosing the original dinamic range of the image?

Fermin Branger
ALFARERIA CINEMATOGRAFICA
Caracas, Venezuela.


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Floh Peters
Re: different gamma when importing Uncompressed 10 bit HD
on May 5, 2010 at 2:48:29 pm

hmmm, where do you export it from; in other words, if you have Uncompressed HD material, how do you convert it to ProRes?



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Fermin Branger
Re: different gamma when importing Uncompressed 10 bit HD
on May 5, 2010 at 3:03:28 pm

Thanks Floh,
..when importing from M100 (checking import media to the media standard and codec). Before that, I made a test converting trough Quicktime with great results, but without time code, and I need it to replace media for online version before export to DPX.
Thanks

fermin

Fermin Branger
ALFARERIA CINEMATOGRAFICA
Caracas, Venezuela.


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Floh Peters
Re: different gamma when importing Uncompressed 10 bit HD
on May 5, 2010 at 6:49:16 pm

This probably is related to a transcoding issue; when exporting a QuickTime you can select either full RGB0-255 range or video RGB16-235 range. Unfortunately you cannot do that for file imports, so all incoming files will be treated as if they have a 16-235 range. Since you are feeding in a 0-255 image you get too much contrast. This is for conversions only, though, so all files that do fast-import come in correctly.



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