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1080p25/1080p30 on Blu-ray


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3 replies to this topic

#1 of 4 OFFLINE   Jari K

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Posted January 02 2014 - 11:11 AM

I believe Blu-ray doesn't support 1080p25/1080p30. Is this still true?



#2 of 4 OFFLINE   Jari K

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Posted January 16 2014 - 04:48 AM

Anyone?

#3 of 4 OFFLINE   JoshZ

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Posted March 05 2014 - 07:19 AM

This is correct. Blu-ray only supports 1080p resolution at 24fps. Content originally photographed at 25fps will either need to be slowed down to 24, or authored as 1080i/50Hz. Likewise, content originally photographed at 30fps (or 60Hz) will need to be authored as 1080i/60Hz.

 

Alternately, they can be down-rezzed to 720p resolution. Blu-ray supports 720p at both 50Hz and 60Hz (as well as 24fps). This is the least desirable option, for obvious reasons.


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#4 of 4 OFFLINE   Jari K

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Posted March 05 2014 - 07:47 AM

Thank you for your info.

 

One additional question (stupid or not): Is the Blu-ray movie on the DISC still encoded at 1080p25 or 1080p30, but the Blu-ray player "converts" it to 1080i/50Hz or 1080i/60Hz? Or is it already 1080i/50Hz or 1080i/60Hz on the DISC?

 

I mean reading stuff like this can be confusing:

 

"The Blu-ray release is encoded at 1080p30, which is not supported by the Blu-ray specification. For this reason, the disc had to be flagged as 1080i60.[8] This means that Blu-ray disc players that only read the flag to decide the format, rather than also checking the content, are only able to play this disc at 1080i60 or lower (e.g. the Sony PlayStation 3)."

 

( http://en.wikipedia....ide_You_in_Time )






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