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Author Topic: 1080i Dvd Playback?  (Read 79 times)

jp110099

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1080i Dvd Playback?
« on: April 12, 2004, 11:39:00 AM »
I was wondering if this was supported yet. I have the 3-31-04 build and it only plays at 480p. It frezzes on 1080i. Has anyone got this to work? Thanks a lot.
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mc_365

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1080i Dvd Playback?
« Reply #1 on: April 12, 2004, 02:20:00 PM »
I beleive this is a hardware limitation of the xbox.  Stand alone players that upsample use very expensive and specialised chips to upscale.
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bobbyblaze

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1080i Dvd Playback?
« Reply #2 on: April 12, 2004, 10:17:00 PM »
Hi,
I thought the Xbox did have scaling capabilities (eg. 720x480 NTSC to 720x576 PAL) or is it that at 2MP resolution the Xbox runs outta gas?

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mc_365

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1080i Dvd Playback?
« Reply #3 on: April 13, 2004, 03:40:00 PM »
The xbox can indead do 720p and 1080i but that is for games.  In games the resolution is coded in the software the box dosent scale it.  Think about it if the box scaled the game that would mean every game could be played in Hi Def; which is not the case.

HD content from a DVD/HD (Compressed with the MS WMV9 codec) needs a very powerfull CPU to decode it.

Straight mpeg2 content like off air and sat brodcast if captured to HD would require more memory (xbox = 64mb sdram) and a faster HD (xbox Hard drive = 5400 rpm ata 100)
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mattgreen500

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1080i Dvd Playback?
« Reply #4 on: April 13, 2004, 05:13:00 PM »
My XBMC also locks up when trying to play DVDs with the Resolution set to 1080i 16:9.  I am using the CVS build from 4-13-04.  However, when I set the Resolution to 720p 16:9, they play at 1280x720.  I think that playing DVDs in 1080i is possible, there's just a problem with it.  

When I was using a build from 03-09-04, the DVD played when my resolution was 1080i, but would only show up in half of the screen.
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jp110099

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1080i Dvd Playback?
« Reply #5 on: April 14, 2004, 09:31:00 AM »
QUOTE (mattgreen500 @ Apr 13 2004, 09:07 PM)
My XBMC also locks up when trying to play DVDs with the Resolution set to 1080i 16:9.  I am using the CVS build from 4-13-04.  However, when I set the Resolution to 720p 16:9, they play at 1280x720.  I think that playing DVDs in 1080i is possible, there's just a problem with it.  

When I was using a build from 03-09-04, the DVD played when my resolution was 1080i, but would only show up in half of the screen.

thtas good news, cuz it takes more power to do 720p than it does to do 1080i.
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mattgreen500

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1080i Dvd Playback?
« Reply #6 on: April 14, 2004, 11:06:00 AM »
I think that I may have a fix for you.  I was also having this same problem, I'm using a build from April 13th.  I was able to backup a dvd to the harddrive and play it in 1080i from there, just not from the DVD-ROM drive.  I came across a post somewhere else where it talked about adjusting the Cache settings.  They are under General Settings.  I edited them to the following:

LAN:
vid - 1024 kb
aud - 512 kb
dvd - 1024 kb

For HDD:
vid - 1024kb
aud - 512kb
dvd - 1024kb

UDF:
vid - 1024kb
aud - 512kb
dvd - 1024kb

After you adjust the cache settings, exit from XBMC and reboot your XBOX.  I tried my DVD with 1080i after this, and sure enough it worked.  I was even able to setup a SMB share on my DVD-ROM drive on my PC and share the DVD from there, while playing it in 1080i.  I would just make sure to write down your cache settings before you change them, just in case.  However, I haven't had any problems after the change.
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blinky8225

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1080i Dvd Playback?
« Reply #7 on: April 14, 2004, 11:34:00 AM »
I can play dvds in 1080i. I have only tried off my hard drive though.
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Bravoexo

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1080i Dvd Playback?
« Reply #8 on: April 14, 2004, 02:16:00 PM »
I do 1080i off Anime DVD's all the time.  But encrypted DVD's don't play... for instance...  LOTR:TT, only the NewLine logo VOB works in 1080i or plays at all... but all the other VOB's don't.
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Butcher_

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1080i Dvd Playback?
« Reply #9 on: April 14, 2004, 02:18:00 PM »
QUOTE (jp110099 @ Apr 14 2004, 07:25 PM)
thtas good news, cuz it takes more power to do 720p than it does to do 1080i.

No it doesn't.
720p = 1280x720 pixels = 921600 pixels.
1080i = 1920x540 pixels = 1036800 pixels.

Regardless, scaling is done in hardware, not on the cpu, so it's effectively "free" (as long as you don't exceed the capabilities of the gpu - the gpu's maximum throughput at 1080p (we render full frames, not interlaced) is around 225 fps).
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jp110099

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1080i Dvd Playback?
« Reply #10 on: April 14, 2004, 04:40:00 PM »
QUOTE (Butcher_ @ Apr 14 2004, 06:12 PM)
No it doesn't.
720p = 1280x720 pixels = 921600 pixels.
1080i = 1920x540 pixels = 1036800 pixels.

Regardless, scaling is done in hardware, not on the cpu, so it's effectively "free" (as long as you don't exceed the capabilities of the gpu - the gpu's maximum throughput at 1080p (we render full frames, not interlaced) is around 225 fps).

actually 720p needs to be put together on the screen all at once.  1080i is equivalent to 540p, thus making it easier to scale.

edit: oops, i didn't see you put 1920x540, it hought u put 1920x1080.

This post has been edited by jp110099: Apr 14 2004, 11:42 PM
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