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maemo.org - Talk (https://talk.maemo.org/index.php)
-   Nokia N810 (https://talk.maemo.org/forumdisplay.php?f=28)
-   -   N810 as a PMP (https://talk.maemo.org/showthread.php?t=15168)

GeneralAntilles 2008-01-18 02:57
Re: N810 as a PMP
 
Quote:
Originally Posted by Kong (Post 129712)
When the device plays 400x240 MPEG4 files, wouldn't the CPU/DSP have scaled the video to the LCD's native resolution (800x480) before it gets to the LCD controller? This would mean that the LCD controller wouldn't know the difference between the 400x240 and 800x480 files.
No, pixel doubling is done on the controller.

Trust me here, the LCD controller is the major bottleneck, not the CPU. :)

tz1 2008-01-18 03:32
Re: N810 as a PMP
 
I have an older USB EyeTV I use on my Mac to record TV, which encodes to mpeg1, but 320x240 and at 1.5Mbps and they play quite well. The mp4/m4v files I use for the iPod seem to be a bit more stressful.

650 Mb for one hour of video in the higher rez mode.

GeneralAntilles 2008-01-18 03:52
Re: N810 as a PMP
 
Quote:
Originally Posted by tz1 (Post 129724)
I have an older USB EyeTV I use on my Mac to record TV, which encodes to mpeg1, but 320x240 and at 1.5Mbps and they play quite well. The mp4/m4v files I use for the iPod seem to be a bit more stressful.
That's VBR, too, I believe (EyeTV 200 and 500 over here).

I wish they would let you customize the automated output a little more finely. As MPEG4 also has AAC which wont be decoded by the DSP.

gammer 2008-01-18 10:26
Re: N810 as a PMP
 
Even if the video bandwith is a limitating factor it is possibel to watch video in fairly good quality on n770/n800/n810. The video properties are a more complex problem. For instance, XVid encoded material does not run smoothly for certain constellations with B-Frames. I found this after a lot of experiments: http://www.internettablettalk.com/fo...8&postcount=13


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