1

Collecting feeds via crontab every hour , these warning messages are being sent to me via mail.
Is there anyway to mute these libpng warnings but still receive the crontab mails , just-in-case there is a problem with the feed update process ?

libpng warning: iCCP: profile 'icc': 'RGB ': RGB color space not permitted on grayscale PNG
and
libpng warning: iCCP: known incorrect sRGB profile

Tiny Tiny RSS v17.12 (c30f5e1)
Debain 9.3 , PHP 5.6.30 , MariaDB 10.1.26

Thanks.

2

use something like update.php 2>/dev/null

other than that idk

3

OK , added , Thanks @fox

4

I’m getting a similar error message repeatedly using the static docker setup. Is there a way to silence them there?

imagecreatefromstring(): gd-png: libpng warning: iCCP: known incorrect sRGB profile
1. include/colors.php(361): imagecreatefromstring(�PNG
5

nope, i think it’s just hardcoded to print this, and there’s no way to disable it.

6

I was looking for a solution to this, and to my best understanding those WARNINGs should not show up inside the tt-rss log.

In other projects, adding @ in front of the function call successfully suppressed the warning (but it is already there in the tt-rss code). For example here:

Related upstream commit from about a year ago:

As far as I can tell, the PHP/GD versions used by the tt-rss docker image should include this fix…so I am a bit at a loss.

I am also seeing other libpng warnings btw (but from the same function call):

imagecreatefromstring(): gd-png: libpng warning: cHRM: invalid chromaticities
1. include/colors.php(361): imagecreatefromstring(�PNG
7

i’m not sure if @ works with tt-rss internal logging, so this may not be (entirely?) on libpng. figuring this out would require quite a bit of digging and it just doesn’t feel like a high priority kinda thing.

as usual, i’d review a relevant PR :slight_smile:

8

Pull requested. :grinning:

I am not completely sure why the relevant part in include/errorhandler.php was commented…it seems fine (but I am also not an expert on this).

9

Interesting…so after the PR was merged, the WARNINGs still show up but look ‘nicer’? The second part containing the raw PNG data is missing now:

E_WARNING (2) 	include/colors.php:361 	imagecreatefromstring(): gd-png: libpng warning: iCCP: known incorrect sRGB profile
		12:01
E_WARNING (2) 	include/colors.php:361 	imagecreatefromstring(): gd-png: libpng warning: cHRM: invalid chromaticities
		12:00

I will continue investigating.

10

i suggest (again) using xdebug :slight_smile: