Setting resolution for picture scaling?

[EwoutB]

I'm running Twonky 4.4.9 on my NAS: QNAP TS-409 Pro. It stores (amongst others) my digital pictures (8Mpixel, 3-4 Mbyte each).

My client is an HDX-1000 (Networked Media Tank -- Syabas middleware).

When playing the pictures through Twonky with rescaling enabled this plays fine (and fast!). However, resolution is a bit low to my taste (JPEG_SM, i.e. VGA?). I see a lot of blocking and aliasing. My screen is 720p.

When disabling rescaling the NMT won't play the pictures when selected from the CDS.

However, I can play the unscaled pictures perfectly thru Samba (i.e. bypassing Twonky). Looks a lot better, but very very slow to render (screen goes black for quite a few seconds between any two consecutive pictures).

Therefore my questions:
* Why won't non-scaled pictures play thru Twonky? Obviously, the NMT is capable of decoding. How are they signalled? I don't think any DLNA media format applies.
* Can I reconfigure the Twonky scaler to output more pixels and bits? E.g. JPEG_LRG would be fine? If so, how to do that? If not, wouldn't this be a useful feature?

[EwoutB]

Actually, come to think about it, for myself JPG_MED would be fine as well, as I have a 720p 16:9 display and my pictures are 4:3.

However, to solve this issue for all HD-capable DMA's (like NMT) out there JPG_LRG at 1440x1080 (for 4:3) and 1920x1080 (for 16:9) would be optimal.

Maybe a choice of options instead of the binary "Disable photo rescaling" would be ideal?