Is it possible set the JPEG quality using the get_serving_url() in Google App Engine?

Question

When using get_serving_url(user.photoBlobKey) to return an image URL from the GAE Blobstore, the Google Images API returns a JPEG image with quality = 70 and size = 512px as default.

Is there any way to increase the default JPEG quality returned by get_serving_url()?

score 2 · Answer 1 · edited May 23 '17 at 12:33

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There's an undocumented URL parameter l, you can add it to the end of the image URL like so: =l100 (or =s640-l70 if you have another param before it) that should modify the output quality of the JPEG. Seems to be =l1 to =l100.

See also: List of all the App Engine images service get_serving_url() URI options

edited May 23 '17 at 12:33

Community

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answered Jan 21 '15 at 01:15

Taylor Hughes

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score 1 · Accepted Answer · edited Feb 15 '12 at 16:00

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No there is not.

If you think it's a useful feature you can add an item to the issue tracker, from there the team will assess the demand for implementing it.

edited Feb 15 '12 at 16:00

Lipis

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answered Feb 15 '12 at 13:22

Stuart Langley

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score -1 · Answer 3 · answered Feb 15 '12 at 16:42

you can't control the output quality but by requesting

get_serving_url(user.photoBlobKey, size=0)

you will get the original size of the image up to 1600px height and width.

the returned url will be automatically postfixed with =s0 which you could add also before rendering the image in the template for example.

Is it possible set the JPEG quality using the get_serving_url() in Google App Engine?

3 Answers3