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Build-Problem with Android #42

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sk2212 opened this issue Jun 9, 2015 · 16 comments
Closed

Build-Problem with Android #42

sk2212 opened this issue Jun 9, 2015 · 16 comments

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@sk2212
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sk2212 commented Jun 9, 2015

Hello RSATom,

QmlVLCDemo is running fine on my desktop system. So I try to compile it for Android ARM device. In build step I get following error message:

/home/s.frenzel/Downloads/android-ndk-r10e/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-g++ --sysroot=/home/s.frenzel/Downloads/android-ndk-r10e/platforms/android-9/arch-arm/ -Wl,-soname,libQmlVlcDemo.so -Wl,-rpath=/home/s.frenzel/Programs/Qt/Qt5.4.1/5.4/android_armv7/lib -Wl,--no-undefined -Wl,-z,noexecstack -shared -o libQmlVlcDemo.so QmlVlc.o QmlVlcConfig.o QmlVlcAudio.o QmlVlcDeinterlace.o QmlVlcInput.o QmlVlcLogo.o QmlVlcMarquee.o QmlVlcMedia.o QmlVlcPlayerProxy.o QmlVlcSurfacePlayerProxy.o QmlVlcPlayer.o QmlVlcPlaylist.o QmlVlcPositions.o QmlVlcSubtitle.o QmlVlcVideo.o QmlVlcVideoFrame.o QmlVlcVideoOutput.o QmlVlcVideoSurface.o SGVlcVideoNode.o QmlVlcMmVideoOutput.o QmlVlcMmPlayer.o vlc_vmem.o vlc_audio.o vlc_basic_player.o vlc_helpers.o vlc_player.o vlc_subtitles.o vlc_video.o vlc_media.o main.o qrc_main.o moc_QmlVlcConfig.o moc_QmlVlcAudio.o moc_QmlVlcDeinterlace.o moc_QmlVlcInput.o moc_QmlVlcLogo.o moc_QmlVlcMarquee.o moc_QmlVlcMedia.o moc_QmlVlcPlayerProxy.o moc_QmlVlcSurfacePlayerProxy.o moc_QmlVlcPlayer.o moc_QmlVlcPlaylist.o moc_QmlVlcSubtitle.o moc_QmlVlcVideo.o moc_QmlVlcVideoOutput.o moc_QmlVlcVideoSurface.o moc_QmlVlcMmVideoOutput.o moc_QmlVlcMmPlayer.o -L/home/s.frenzel/Downloads/android-ndk-r10e/sources/cxx-stl/gnu-libstdc++/4.9/libs/armeabi-v7a -L/home/s.frenzel/Downloads/android-ndk-r10e/platforms/android-9/arch-arm//usr/lib -lvlc -L/home/s.frenzel/Programs/Qt/Qt5.4.1/5.4/android_armv7/lib -lQt5Quick -L/opt/android/ndk/sources/cxx-stl/gnu-libstdc++/4.8/libs/armeabi-v7a -L/opt/android/ndk/platforms/android-9/arch-arm//usr/lib -lQt5Multimedia -lQt5Gui -lQt5Qml -lQt5Network -lQt5Core -lGLESv2 -lgnustl_shared -llog -lz -lm -ldl -lc -lgcc
/home/s.frenzel/Downloads/android-ndk-r10e/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.9/../../../../arm-linux-androideabi/bin/ld: error: cannot find -lvlc
QmlVlcConfig.o:QmlVlcConfig.cpp:function QmlVlcConfig::releaseLibvlcInstance(libvlc_instance_t*): error: undefined reference to 'libvlc_release'
QmlVlcConfig.o:QmlVlcConfig.cpp:function QmlVlcConfig::createLibvlcInstance(): error: undefined reference to 'libvlc_new'
QmlVlcAudio.o:QmlVlcAudio.cpp:function QmlVlcAudio::description(unsigned int): error: undefined reference to 'libvlc_audio_get_track_description'

I think it is "only" a linker problem, right? What is missing?

Regards
@RSATom
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RSATom commented Jun 9, 2015

It seems It missing libvlc. I didn't try use it on Android, since I don't have it.

And read this please: #29

@sk2212
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sk2212 commented Jun 9, 2015

Okay...compiling :-). Will let you hear about my findings.

@sk2212
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sk2212 commented Jun 10, 2015

Finally I got it working!

What I have done:

  • Use this tutorial https://bitbucket.org/edwardcw/libvlc-android-sample for building libvlc for Android. It is very very important to use a special revision of the git repository. So do NOT forget to apply "git checkout b01969a4bfe1b2fa4580f5e8df08dc29566d7a16". Furthermore I only get it compiled with Android NDK Version 9 (http://dl.google.com/android/ndk/android-ndk-r9d-linux-x86_64.tar.bz2).
  • On a terminal in the checked out git repository execute "export ANDROID_ABI=armeabi-v7a" and "export ANDROID_NDK=/path/to/your/android-ndk-r9d/"
  • Run "./compile.sh release" 3 times until it says that it cannot download "ant" package

I did not know whether that is the correct way but it seems that "ant" is not necessary to download if you have it already installed on your system "apt-get install ant". However the script stops when it cannot download "ant".
So we simply remove the check:

  • Open the file "vlc/extras/tools/bootstrap" with a editor and remove the line "check ant". Save the file.
  • Run "./compile.sh release" the last time
  • Run "make .sdk"

After that we have a compiled "libvlcjni.so" file in "vlc-sdk/libs/armeabi-v7a". This is our "libvlc" file which we can use to compile "QmlVlcDemo" on an Android Device.

  • In Qt Creator open "QmlVlcDemo.pro" and add or replace
    win32 {
    LIBS += $$PWD/deps/libvlc-sdk/lib/msvc/libvlc.lib
    } else {
    LIBS +=/path/to/your/gitrepo/android/libvlc/libs/armeabi-v7a/libvlcjni.so
    }
  • In the last step copy the content from "vlc-sdk/libs/armeabi-v7a" to "/path/to/QT/Programs/Qt/Qt5.4.1/5.4/android_armv7/lib"

After that it shoud be possible to build and run the project "QmlVlcDemo".

Maybe you can add this steps to a Wiki or README Page, RSATom? I have double check the steps which I have descriped here. It should work!

The performance is very good! NO stutter, NO sync problems. I run "Live TV" from an Set Up Box over UPNP.

Regards,
Sandro

@RSATom
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RSATom commented Jun 10, 2015

It's great! Thank you very much Sandro!

Maybe you can add this steps to a Wiki or README Page, RSATom?

You could do it yourself :) Wiki for this project is open to edit by anyone. So fill free to do it - just please do it as separate article.

The performance is very good! NO stutter, NO sync problems.

Hm... This sounds very strange to me. What hardware do you use?

@sk2212
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sk2212 commented Jun 10, 2015

Alright :-).

Strange? Why?

I tested it on an "old" Rockchip RK30 based Tablet with a 1,8GHz Quadcore processor using Android 4.2.2 and on a Nexus 4 with Android 5.1.1

On both devices - no problems.

@RSATom
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RSATom commented Jun 10, 2015

Just because guys at #29 complained on performance of QmlVlc on Android, and if take in to account I never event try it run on Android, so I really surprised it works well :)
Maybe it's just some difference between tablets vs phones in performance, don't know.

@RSATom
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RSATom commented Jun 10, 2015

Anyway, thank you for your effort!

@sk2212
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sk2212 commented Jun 10, 2015

The Nexus 4 is a phone ;-).

However it seems that there are performance issues when running 1080p content. So the guy from #29 is right.

Maybe it is because of the old libvlc version for Android. There must be a way to compile it without going back to "git checkout b01969a4bfe1b2fa4580f5e8df08dc29566d7a16".

Anyway...for a prove of concept that THERE IS a way to get it working on an Android device I will create a Wiki-Page.

@RSATom
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RSATom commented Jun 10, 2015

The Nexus 4 is a phone ;-)

Yes, I know :) but it's not low level phone. It's pretty powerful.

Anyway...for a prove of concept that THERE IS a way to get it working on an Android device I will create a Wiki-Page.

Or course, please do it. It will be useful.

@sk2212
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sk2212 commented Jun 10, 2015

Hmmm...just tried it with latest revision from android-vlc git repository. I was able to compile it. No idea what was wrong last time. However building is fine but trying to start app leads to following error:

D/dalvikvm(16780): GC_CONCURRENT freed 250K, 7% free 4241K/4520K, paused 3ms+2ms, total 18ms
D/dalvikvm(16780): Trying to load lib /data/data/org.qtproject.example.QmlVlcDemo/lib/libgnustl_shared.so 0x41100218
D/dalvikvm(16780): Added shared lib /data/data/org.qtproject.example.QmlVlcDemo/lib/libgnustl_shared.so 0x41100218
D/dalvikvm(16780): No JNI_OnLoad found in /data/data/org.qtproject.example.QmlVlcDemo/lib/libgnustl_shared.so 0x41100218, skipping init
D/dalvikvm(16780): Trying to load lib /data/data/org.qtproject.example.QmlVlcDemo/lib/libvlcjni.so 0x41100218
D/dalvikvm(16780): Added shared lib /data/data/org.qtproject.example.QmlVlcDemo/lib/libvlcjni.so 0x41100218
E/VLC/JNI/VLCObject(16780): FindClass(org/videolan/libvlc/LibVLC) failed
W/dalvikvm(16780): JNI_OnLoad returned bad version (-1) in /data/data/org.qtproject.example.QmlVlcDemo/lib/libvlcjni.so 0x41100218
W/System.err(16780): java.lang.reflect.InvocationTargetException

@RSATom
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RSATom commented Jun 10, 2015

for me it's like it can't load libvlc module.

@sk2212
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sk2212 commented Jun 11, 2015

Hmm...I did not get it to work. However the guy from #29 already points out that there is a problem in

void QSGVlcVideoFrameMaterial::bindPlane( GLenum texUnit, GLuint texId, const void* plane,
quint16 width, quint16 height )

of QmlVlc.

I have not so good C++ knowledges but it must be possible to use another method than "glTexImage2D".

https://vec.io/posts/faster-alternatives-to-glreadpixels-and-glteximage2d-in-opengl-es

Maybe you have time to implement it?

@RSATom
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RSATom commented Jun 11, 2015

Maybe you have time to implement it?

I've already mentioned it's will be good to implement support of PBO or EGLImage inside QmlVlc. And I want do it long time. The problem is - I don't have any android device to test it on.

@sk2212
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sk2212 commented Jun 11, 2015

Well...I can help you with this "problem" :-). But maybe we can clarify this about direct mail contact?

@RSATom
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RSATom commented Jun 11, 2015

hm... interesting :) My mail is not secret, and you are free write me directly if it has a meaning: rsatom at gmail dot com

@RSATom
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RSATom commented Sep 17, 2015

it was fixed some time ago

@RSATom RSATom closed this as completed Sep 17, 2015
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