Problems with "jpeg" library (I guess)

[SkripT]

Hi all, I am working with Qt4 Opensource Version for Windows XP. I have a strange problem : when I try to save a QImage with format "jpeg", the quality parameter seems to be omitted and the final result has always the same size. I don't know why. I've tried to save the image with the class QImageWritter but the result is the same. Has anybody the same problem or knows how to solve it? Thanks.

[fullmetalcoder]

You may try to recompile Qt with full JPEG support.
I think it's basically supported as a plugin but libjpeg is provided with the sources so it shouldn't be too hard (maybe a little bit long but well...)

[SkripT]

Sorry, I've been looking the configure options but I don't see anyting related with full jpeg support. The only thing I see is that I can choose between the system jpeg library or the one from Qt. I actually am usin the Qt libary (plugins/imageformats/qlibjpeg1.dll) or so I think. Could you tell me how to recompile with full jpeg support, please? Thanks

[SkripT]

Anybody could explain me if my problem is that I have to re-compile with full jpeg support. And, in this case, how to do it. Thanxs

[dimitri]

There's no such thing as "full JPEG support" in Qt - either support for JPEG is built in or not.

Which version of Qt is this?
80903 - Setting Jpeg Quality does not work

[SkripT]

Thanks, I understand all now. It was really strange that changing the quality nothing happens. Do you know if there's a new version for Windows with this bug fixed??

[GreyGeek]

Thanks, I understand all now. It was really strange that changing the quality nothing happens. Do you know if there's a new version for Windows with this bug fixed??

Yes, it's called "Linux"!

[wysota]

Thanks, I understand all now. It was really strange that changing the quality nothing happens. Do you know if there's a new version for Windows with this bug fixed??

The bug is mentioned as "fixed", so I guess you download the newest daily snapshot from TT page and it should be there.

[SkripT]

Thanks again