Please allow us to upload our screenshots as .PNG files rather than a lossy format like jpeg. Even if you end up converting them to jpegs for display on the Ouya, it is better to start with an uncompressed format.
Even if you end up converting them to jpegs for display on the Ouya, it is better to start with an uncompressed format.
No it's not. I mean, if you export a JPEG from Photoshop you're doing the same thing - exporting a lossy format from a lossless source image. I fail to see how it would be at all better to have OUYA servers convert our PNGs to JPEGS - in fact it might be worse, as we wouldn't get any control over compression ratio.
You didn't remember the plot of the Doctor Who movie because there was none; Just a bunch of plot holes strung together.
Actually it would be worse. I always set quite high quality for exportet JPGs not much looking at how much space they take. ;P I doubt their auto-converter would do that.
Even if you end up converting them to jpegs for display on the Ouya, it is better to start with an uncompressed format.
No it's not. I mean, if you export a JPEG from Photoshop you're doing the same thing - exporting a lossy format from a lossless source image. I fail to see how it would be at all better to have OUYA servers convert our PNGs to JPEGS - in fact it might be worse, as we wouldn't get any control over compression ratio.
If they leave the jpeg intact, then yes. If they re-compress it with their own settings (which is often done to make sure that the image is not corrupt), then no.
If they leave the jpeg intact, then yes. If they re-compress it with their own settings (which is often done to make sure that the image is not corrupt), then no.
Are you sure about that? I can see this being done for other reasons, but for ensuring an image isn't corrupt, attempting to re-encode just to see if an image is properly encoded seems inefficient. Why not just stop at decoding? What I can see is re-encoding to ensure there's nothing "extra" in the image stream (you can do some crazy things, I've seen whole ZIP files encoded in perfectly valid JPEGs)
You didn't remember the plot of the Doctor Who movie because there was none; Just a bunch of plot holes strung together.
Side note: reencoding jpegs is almost a must, unless you really trust users. I used to work for a photo hosting company and they started reencoding every image after some users - probably unknowingly - uploaded infected jpegs (jpegs corrupted in such way as to overflow some buffer in Internet Explorer and infect Windows with a virus - of course it's harder to infect other browsers and systems and the bug that allowed the buffer overflow is long fixed probably).
I've never seen lossless jpeg as a save option in any image manipulation program I've used. I use Gimp, and even saving at 100% quality results in noticeable artifacts.
ladron
Posts: 31Member
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Agreed!
No it's not. I mean, if you export a JPEG from Photoshop you're doing the same thing - exporting a lossy format from a lossless source image. I fail to see how it would be at all better to have OUYA servers convert our PNGs to JPEGS - in fact it might be worse, as we wouldn't get any control over compression ratio.
What I can see is re-encoding to ensure there's nothing "extra" in the image stream (you can do some crazy things, I've seen whole ZIP files encoded in perfectly valid JPEGs)
http://en.wikipedia.org/wiki/Lossless_JPEG