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Sent MMS scaled to too small image [answered]

asked 2014-04-11 14:23:13 +0300

JvD gravatar image

updated 2014-04-11 14:32:03 +0300

I sent a MMS picture to a friend with a Jolla phone. Picture is also taken with a Jolla. Received image is scaled from 3264x1840 down to 128x72 pixels. Which too small to be useful.

Edit: Added images after gaining enough karma

Original: image description MMS processed: image description

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The question has been closed for the following reason "the question is answered, an answer was accepted" by slava
close date 2014-05-13 23:19:37.733977



AFAIK, a lot of conversion can be done by the provider. To make things worse, providers may choose the conversion applied based on which handsets they believe are used. Unusual phones are likely to be treated as "unknown, so assume old and outdated hardware". (I faintly remember this was an issue with MMS on the Nokia N900.) This might explain different results with different phones on the same network - and with the same phone on different networks.

ossi1967 ( 2014-04-11 14:52:53 +0300 )edit

Jolla would also resize the image before sending it - most likely down to 1632x920, in order to squeeze the MMS PDU into 300k. The rest of the damage is done by the operator on the receiving side. Another problem is that they turn Exif files into plain JFIF, losing the orientation marker in the process. As I said earlier, we are working with DNA to resolve this issue. We should have done that before releasing MMS to the public, but we have discovered it too late. Sorry about it.

slava ( 2014-04-11 15:14:02 +0300 )edit

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answered 2014-04-11 14:56:22 +0300

slava gravatar image

DNA MMS infrastructure is rescaling the images to a ridiculously small size. It's only a problem when Jolla is receiving an MMS on the DNA network. Sending works fine, other major Finnish operators don't seem to have such a problem at all. We are aware of this issue and working with DNA to fix it. Most likely, the fix will be on their side, you won't have to upgrade your phone.

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Yes this seems to be the case. See my comment below to tigelis questions

JvD ( 2014-04-11 15:15:56 +0300 )edit

Looks like the DNA issue has been resolved.

slava ( 2014-04-12 12:50:04 +0300 )edit

I confirm. Image received on DNA network sent from Tele Finland is 1280x721.

JvD ( 2014-04-12 13:45:27 +0300 )edit

answered 2014-04-11 14:37:36 +0300

tigeli gravatar image

updated 2014-04-11 14:39:36 +0300

  1. Sent MMS from Jolla to Jolla -> picture is 1088x816. (Sonera->Sonera)
  2. Sent MMS from iPhone to Jolla -> picture is 1024x768. (Saunalahti->Sonera)

Was the MMS sent within the same operator or between two different operators?

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My case was Tele Finland -> DNA

I did try twice

Also received MMS did work OK from Windows Phone

JvD ( 2014-04-11 14:38:52 +0300 )edit

@JvD Does it happen also otherway around? From DNA to Tele Finland?

tigeli ( 2014-04-11 14:40:50 +0300 )edit

Doesn't seem to work at all other way at all. I may see a result within couple of next days. Maybe. Cases so far:

Jolla Tele -> Jolla DNA -> small Image

Jolla DNA -> Jolla Tele -> not received yet

Jolla Tele -> Iphone 5 Elisa -> 1088x613

Iphone 5 Elisa -> Jolla Tele -> 1088x613

Windows Phone Elisa (was DNA) -> Jolla Tele -> original resolution

JvD ( 2014-04-11 15:11:38 +0300 )edit

Jolla DNA -> Jolla Tele -> 920x1632

Some Symbian device some Russian operator -> Jolla Tele Finland -> 674x1200

JvD ( 2014-04-11 18:04:36 +0300 )edit

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Asked: 2014-04-11 14:23:13 +0300

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Last updated: Apr 11 '14