Jayesh Salvi wrote:
It is also a possibility to fork another inkscape instance as command line and use --export-png to convert to PNG (I think flickr/picasa will accept png). But the conversion result was very poor when I tried it. When the SVG image contained some simple black lines on a white background, the resultant PNG contained only black lines and no background.
flickr will automatically convert at upload time the PNG to JPEG with a very poor result: you can't adjust the quality but, even worse, this will destroy the alpha transparency (blur shadows, antialiased edges), so this is not a viable option. Picasaweb added support for PNG (it used to not accept PNG files) and it seems to work correctly.
Probably you could fork another Inkscape, export as PNG, use ImageMagick to convert to JPEG and upload that JPEG, but it seems more trouble (and poorer) than using gdk-pixbuff.