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1

ld: undefined reference to avformat_network_init@LIBAVFORMAT_53

asked 2012-05-17 23:25:24 -0500

sciarp
129 ●7 ●8 ●12

Hi there!

I wrote a node that converts webcam images to ROS messages, I am using opencv but the linker yells:

/opt/ros/fuerte/lib/libopencv_highgui.so: undefined reference to `avformat_new_stream@LIBAVFORMAT_53'
/opt/ros/fuerte/lib/libopencv_highgui.so: undefined reference to `avformat_network_init@LIBAVFORMAT_53'

How do I overcome this problem? Thanks

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answered 2012-08-14 06:03:30 -0500

leeq
26 ●1 ●4

I fixed the problem by upgrading my stock libavformat to the latest one using Jon's PPA: https://launchpad.net/~jon-severinsson/+archive/ffmpeg

Basically av_new_stream() was renamed to avformat_new_stream(). ffmpeg is quite famous for frequently changing API names..which causes lots of overhead for developers.

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-1

answered 2012-08-14 05:46:14 -0500

leeq
26 ●1 ●4

updated 2012-08-14 05:48:54 -0500

Sorry that it's not an answer.

Does anyone know the answer to this? I'm stuck with this exact problem as well. Please??

I basically copy and pasted the example code from: http://www.ros.org/wiki/cv_bridge/Tutorials/UsingCvBridgeToConvertBetweenROSImagesAndOpenCVImages

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Asked: 2012-05-17 23:25:24 -0500

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Last updated: Aug 14 '12

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