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gscam core dumped with ximagesrc

asked 2013-07-26 00:51:48 -0500

Enric gravatar image

updated 2013-07-26 23:14:47 -0500


I want to use gscam for capturing a window image. First, I have perfomed a simple test with:

$ export GSCAM_CONFIG="videotestsrc ! video/x-raw-rgb,framerate=5/1 ! ffmpegcolorspace"

And it works nicely. So I have set:

$ export GSCAM_CONFIG="ximagesrc xname=TurtleSim ! video/x-raw-rgb,framerate=5/1 ! ffmpegcolorspace"

But it fails :

Segmentation fault (core dumped)

It seems to be the std::copy from the buffer to the image.

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answered 2013-07-26 23:12:33 -0500

Enric gravatar image

updated 2013-07-26 23:24:26 -0500

I have figured it out a little bit.

It turns out that gray images do work, with this config:

GSCAM_CONFIG="ximagesrc xname=TurtleSim ! autoconvert ! video/x-raw-gray,framerate=1/1 "

and running gscam in MONO8 mode.

My guess is that the output format from ximagesrc is 32bpp whereas gscam expects 24bpp, so the buffer is overrun.

I haven't been able to make a conversion in the pipeline, but anyway gray images are fine :-)

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Asked: 2013-07-26 00:51:48 -0500

Seen: 231 times

Last updated: Jul 26 '13