2011-02-20, 23:53
Samples of h.264 4K resolution video is hard to find and I only found one ready to use sample. ...It crashed XBMC hard. This isn't a technical problem since I was half expecting video that's 4096 pixels across to potentially cause a problem.
Anyway, using Windows Vista with a Radeon HD 4650 for DXVA I found that 2K resolution works in XBMC. That's 2048 pixels across, the sample I used is infact right here: http://www.sintel.org/wp-content/content/download.html
2K is only slightly higher resolution than 1080p so this wasn't a surpise that it worked. And it's nice to know that XBMC can readily support 2K cinematic resolution that is typically seen in digital theaters.
4K, well, I dunno what the issue is. I'm wondering if the ATi driver for DXVA has a resolution limit and 4K is just well beyond that limit. Technicly, ATi only states that the cards accelerate up to 1080p but 2K is higher than that, even if only slightly. Maybe with CPU decoding, 4K could be decoded but my XBMC box is only a single core Athlon 64 and it won't do 1080p on CPU, then alone 4K.
Has anyone done similar testing? Maybe with a CPU powerful enough to deal with 4K footage in software decoding?
Anyway, using Windows Vista with a Radeon HD 4650 for DXVA I found that 2K resolution works in XBMC. That's 2048 pixels across, the sample I used is infact right here: http://www.sintel.org/wp-content/content/download.html
2K is only slightly higher resolution than 1080p so this wasn't a surpise that it worked. And it's nice to know that XBMC can readily support 2K cinematic resolution that is typically seen in digital theaters.
4K, well, I dunno what the issue is. I'm wondering if the ATi driver for DXVA has a resolution limit and 4K is just well beyond that limit. Technicly, ATi only states that the cards accelerate up to 1080p but 2K is higher than that, even if only slightly. Maybe with CPU decoding, 4K could be decoded but my XBMC box is only a single core Athlon 64 and it won't do 1080p on CPU, then alone 4K.
Has anyone done similar testing? Maybe with a CPU powerful enough to deal with 4K footage in software decoding?