[Interest] Fastest Way to convert a QVideoFrame to an QImage?

Jason H scorp1us at yahoo.com
Thu Feb 13 03:09:07 CET 2014

ZBar, it only takes Y800 or 8bpp gray to the barcode scanning functions.

----- Original Message -----
From: Till Oliver Knoll <till.oliver.knoll at gmail.com>
To: Qt Project <interest at qt-project.org>
Sent: Wednesday, February 12, 2014 1:11 PM
Subject: Re: [Interest] Fastest Way to convert a QVideoFrame to an QImage?

Am 12.02.2014 um 18:55 schrieb Jason H <scorp1us at yahoo.com>:

> ...
> Really, All I need is 2D 8bpp gray to pass off to the library. 

Sorry, I missed that part: which library are we now talking about? An external one (!= Qt). Your own?

If the later: couldn't you not simply write your 8bit greyscale data into a plain vanilla char * buffer instead of trying to squeeze it back into a QImage (which apparently does not support "non-indexed 8bit greyscale" format)? Who processes that greyscale image in the end? Your own code? Or some other code you cannot modify?


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