Upscaling problems?

[gfairbanks]

Others have posted that everything is working great for them. When I play low resolution (624x352) videos, they are upsampled to HD (1280x720) but look jagged. XBMC linux did this correctly a few weeks ago, so this problem is new to me.

Are others seeing this too, or do I need to nuke my user profile and try again?

Thanks,

-George

[Gamester17]

Jagged as in interlaced (if so then enable the deinterlace filter from the OSD)?,
or do you mean page tearing (in which case it could be your video drivers or a bug)?

what is interlacing?
http://www.100fps.com
http://en.wikipedia.org/wiki/Interlace
http://en.wikipedia.org/wiki/Deinterlacing
http://en.wikipedia.org/wiki/Progressive_scan

What is page tearing?
http://en.wikipedia.org/wiki/Tearing

[gfairbanks]

Hi Gamester17,

You're not supposed to be providing support ;-) But thank you.

Here are two hand-held snapshots of my screen. Both are of last week's Saturday Night Live comedy show. This one is from XBMC Linux:

http://groupedia.com/tmp/dsc_3057.jpg

This one is from the good old Xbox XBMC:

http://groupedia.com/tmp/dsc_3058.jpg

This show was originally broadcast in 1080i (I think), captured in MythTV, and transcoded it with Xvid to 624x352 progressive. I have seen occasional tearing of the video, but that's not what you see in these two pictures. I believe it's an upsampling problem, where a low res image is rendered on a higher resolution screen (720p in my case).

I'm not complaining or asking for a bug fix -- I just read other people's posts that everything is working great and wondered if they too were seeing this.

-George

[Gamester17]

Which player are you using on the Xbox (MPlayer or DVDPlayer?, check the info screen)?

...and post a debug log (upload to pastebin, see the online wiki manual) from XBMC Linux

[d4rk]

If possible, can you provide the following information:

1. glxinfo output
2. output of the command 'ffmpeg -i <videofile>' on the file you are testing.
3. general computer specs.

Also, make sure that in playback settings, that video scaling is set to 'Bilinear' and not 'Nearest Neighbor'

[gfairbanks]

Thanks for the suggestions. In order to give you good feedback, I checked out the source in a new directory and built everything from scratch, including a fresh UserData directory. That fixed the rendering problem. I don't know what was in the old one, but I'm glad this is working better.

Regards,

-George