Problem when building qtMEL on Ubuntu

[marcosuma]

Hi everyone, I am trying to compile qtmel library on Ubuntu, because .deb packages does not work on my system. I downloaded the library source code from GitHub repo but I had to modify it to compile it successfully; but when I tried to include that library on the cameraExample code it did not work. I have also tried to use the .a that came with the code and they did not work.
Did anyone try to do that?
Thanks in advance,
Marco

[kibsoft]

Could you provide more information?

[angelosalatino]

Hi, I work with @marcosuma. We have downloaded the QtMEL (from here: https://dl.dropboxusercontent.com/u/77719957/QtMEL_Library.zip) and even if it is written on the web site that for Linux platform is partially done, we have tried to compile the examples on Ubuntu with the ffmpeg and opencv compiled, without any success. We have followed three ways:

1. use the examples with the compiled version of QtMEL by linking the static libraries in the .pro file of the example
2. tried to compile QtMEL on ubuntu (downloading the tar.gz archive). There were some issues with type (conflicts on AVBuffer and so on). At the end, we have solved them and compiled the library. However the generated library couldn't be used in the examples.
3. we have tried to use the .deb packages, but we were unable to install them due to some dependencies.
   No one of the three ways worked.
   Do exist a kind of procedure that allows to work on ubuntu? Thank you in advance.

[marcosuma]

This is what happen when i try to open qtmel library project in qt and i try to compile, after setting correctly .pro file. It seems to be errors caused by types redefinition.
http://imageshack.com/a/img541/5746/ulg2.png

[kibsoft]

Got it. As I said before it happens because you use newest version of LibAV.
You have to use http://ffmpeg.zeranoe.com/builds/source/ffmpeg/ffmpeg-git-14d94a1.tar.bz2
only this version.

[marcosuma]

Ok, I'll try soon

[marcosuma]

Ok, now compilation was successfull. But when I try to compile CameraExample, it unexpectedly finish immediately; in debug mode i can see the following error:
https://imagizer.imageshack.us/v2/1146x651q90/856/66fi.png
the .pro file is the following:
https://imagizer.imageshack.us/v2/1146x651q90/812/qg2y.png
What about?

[kibsoft]

Did you build LibAV with h264 support?

[marcosuma]

Yes, i compiled ffmpeg with the following "configure":
./configure --enable-gpl --enable-libass --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libspeex --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-x11grab --enable-libx264 --enable-nonfree --enable-version3 --enable-shared