Friday, December 26, 2014

Binaries for Hardware Accelerated Qt Multimedia Backend on Raspberry Pi

As someone still have troubles building PiOmxTextures, I prepared a little package that contains the binaries needed to make it run and have a look. In the past I tried to provide an entire firmware, but it was large to upload and not very comfortable to update. This package only contains:

  • PiOmxTextures.tar: library to provide the playback capabilities, including ffmpeg 2.5.
  • Qt-rasp-5.4.0.tar: the entire tree of Qt 5.4.0 binaries built for Raspberry Pi (firmware ba43047, rpath is set to /usr/local/Qt-rasp-5.4.0).
  • Qt-rasp-5.4.0_host.tar: the utility to be used on the host when cross-building (built for x86 Kubuntu 13.10).
Current version of the package is 4.3.0: download.

To have a quick look, just place Qt-rasp-5.4.0 in /usr/local into your Pi, then place PiOmxTextures somewhere and add it to the runtime library path. Now you can test running qmlvideo or qmlvideofx from the Qt Multimedia examples. Something similar to this should come up: 
Bye! ;-)
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36 comments:

  1. AnonymousDecember 28, 2014 at 12:25 AM

    This is great thank you very much for your efforts, sorry for the dumb question but could you elaborate on how I "add it to the runtime library path"??

    ReplyDelete
    Replies
    1. Luca CarlonDecember 28, 2014 at 3:53 AM

      http://www.eyrie.org/~eagle/notes/rpath.html

      Delete
    2. AnonymousDecember 29, 2014 at 5:29 PM

      Thanks for this, works perfectly for me now.

      Delete
  2. AnonymousDecember 31, 2014 at 1:02 AM

    Thanks man! Thats a nice Xmas gift

    ReplyDelete
  3. AnonymousJanuary 1, 2015 at 2:50 PM

    Should I use these steps ("http://thebugfreeblog.blogspot.com.br/2013/03/raspberry-pi-wheezy-image-with-qt-and.html) to setup QT properly?

    ReplyDelete
    Replies
    1. Luca CarlonJanuary 1, 2015 at 4:21 PM

      I don't know what you mean by setup. Do you want to run something on the Pi or to build something else with Qt?

      Delete
    2. UnknownJanuary 1, 2015 at 6:33 PM

      I want to setup QT in my Ubuntu/x86 to cross compile with the provided tools (Qt-rasp-5.4.0_host.tar)

      QT is refusing the provided qmake when I add it on "Options > Build & Run > Qt Versions".

      Qmake not executable: "The qmake executable /usr/local/Qt5.4.0/bin/qmake could not be added. Cannot start /usr/local/Qt5.4.0/bin/qmake: No such file or directory"

      I own the file and it has the execute flag set...

      Thanks, Luca.

      Delete
    3. Luca CarlonJanuary 1, 2015 at 6:43 PM

      Can you run it from the command line? It is built for x86 on Kubuntu 13.10. Maybe your system is not compatible.

      Delete
    4. AnonymousJanuary 1, 2015 at 6:55 PM

      Can't run on command line as well: "No such file or drectory".

      I'm on Lubuntu x86_64... nothing too fancy.

      Delete
    5. Luca CarlonJanuary 1, 2015 at 8:41 PM

      http://askubuntu.com/questions/133389/no-such-file-or-directory-but-the-file-exists

      Delete
    6. AnonymousJanuary 1, 2015 at 9:21 PM

      Nailed it! Thanks, Luca!!!

      Delete
  4. UnknownJanuary 2, 2015 at 5:25 PM

    hello dear luca ...i am working on my raspberry pi b+ and i need play mp3 music with qtmultimedia (i have my aplication on ubuntu 14.04 64bits and Qt 5.3.2 but i need its on my raspberry ) i tried with some tutorials but i can complilate qt on my rapberry , i dont know for where start .. can you help me how i can compilated qt with qtmultimedia ??? i am a begginer

    ReplyDelete
    Replies
    1. Luca CarlonJanuary 2, 2015 at 5:27 PM

      Playing music on Pi should be very simple. Just build with gstreamer support and you should be done.

      Delete
  5. UnknownJanuary 2, 2015 at 5:32 PM

    i can do that http://thebugfreeblog.blogspot.it/2012/11/bring-up-qt-50-on-raspberry-pi.html ?????

    ReplyDelete
    Replies
    1. Luca CarlonJanuary 2, 2015 at 6:00 PM

      Yes, same way. But as you can see that build was not supporting gstreamer. You need to also add gstreamer libs and headers to the sysroot and then check Qt configure to ensure the build will include gstreamer support. Last time I did that was several months ago, but may still work.

      Delete
  6. UnknownJanuary 2, 2015 at 6:17 PM

    thanks i will try

    ReplyDelete
  7. Luca CarlonJanuary 26, 2015 at 3:49 PM

    So you're using the lib by itself? Without the Qt plugin?

    ReplyDelete
  8. Luca CarlonJanuary 26, 2015 at 4:04 PM

    Ok, Qt 5.4, but are you using the Qt backend plugin or libPiOmxTextures directly? What code do you use to play the video?

    ReplyDelete
  9. Luca CarlonJanuary 26, 2015 at 5:22 PM

    I suggest you use the Qt backend provided according to the articles on the blog instead. Using the library directly is pretty outdated.

    ReplyDelete
  10. UnknownFebruary 15, 2015 at 5:39 PM

    I would like to use this without qtquick, but that is currently not possible.
    Could this be changed somehow?

    ReplyDelete
    Replies
    1. Luca CarlonFebruary 16, 2015 at 12:12 AM

      It depends on where you want to use it.

      Delete
    2. UnknownFebruary 16, 2015 at 10:55 AM

      I created an app that has a QGraphicsView with in it a QVideoItem to play the video. That did not work.

      Currently I'm rewriting that app to use QML, which goes better than expected (I had no experience with QML yet) so maybe its not a problem after all.

      Delete
  11. UnknownFebruary 16, 2015 at 5:16 PM

    Hi Luca

    I had been trying to use these binaries. I cross-compile succesfully with Qt Creator the qmlvideo example, and it executes but after I select the file and click a Video mode I got the following error:

    defaultServiceProvider::requestService(): no service found for - "org.qt-project.qt.mediaplayer"
    qml: [qmlvideo] VideoItem.onError error 5 errorString The QMediaPlayer object does not have a valid service
    qml: [qmlvideo] Content.onFatalError

    And the video doesn't reproduce.

    I have followed the instructions and started in the clean distro of raspbian after installing all the libraries you mention in the older posts.

    Can you help me figuring out what the problem is?
    Thanks in advance.

    ReplyDelete
  12. UnknownFebruary 17, 2015 at 3:43 PM

    Hi again Luca

    Yesterday I continued the cross-compiling of Qt5.3.2, following your instructions to get the openmaxil backend and add it to qtmultimedia, which I compiled and installed again.

    Now when I execute the example qmlvideo i don't get the error mentioned in the last post, but the video is played at a very low framerate, as if it where not hardware accelerated.

    Any ideas about this?

    ReplyDelete
    Replies
    1. Luca CarlonFebruary 17, 2015 at 4:22 PM

      Probably not using the correct plugin.

      Delete
    2. UnknownFebruary 17, 2015 at 4:49 PM

      I forgot to mention that Qt Creator displays the following messages as Application output...

      Cannot connect to server socket err = No such file or directory
      Cannot connect to server request channel
      jack server is not running or cannot be started
      Warning: "A lot of buffers are being dropped."

      Delete
    3. Luca CarlonFebruary 17, 2015 at 4:53 PM

      That confirms you're not using this plugin. You're probably using the gstreamer plugin.

      Delete
    4. UnknownFebruary 17, 2015 at 5:01 PM

      Thanks for your reply Luca... I'm newbie at all this...

      Where or How do I select the Plugin that uses qtmultimedia?

      When I compiled Qtmultimedia (after applying the patch) it found and compiled the Openmaxil Plugin, so I assumed it would use it from now on.
      Do I have to make some changes in qmlvideo? Same thing happens if I try to execute POCPlayer

      Delete
    5. Luca CarlonFebruary 17, 2015 at 5:04 PM

      Remove any media plugin but PiOmxTextures.

      Delete
    6. UnknownFebruary 17, 2015 at 5:19 PM

      IIRC, I removed the libgstmediaplayer.so from the qt/plugins/mediaservice but now I have the same error than before

      defaultServiceProvider::requestService(): no service found for - "org.qt-project.qt.mediaplayer"
      qml: [qmlvideo] VideoItem.onError error 5 errorString The QMediaPlayer object does not have a valid service
      qml: [qmlvideo] Content.onFatalError

      I guess this is because the application is still looking for the gstreamer plugin...
      When you say "Remove any media player but PiOmxTextures" do you mean before compiling qtmultimedia (after the patch)?

      I'm really sorry if I'm asking nonsense for you, but I'm lost right now... Is there any other way to chat with you?

      Delete
    7. UnknownFebruary 17, 2015 at 6:06 PM

      Got It!!!! I had the library path wrong....

      Thanks a Lot Luca!

      Delete
  13. UnknownMarch 25, 2015 at 6:35 PM

    Hi, All!!!
    Please help me! I try full week for create app with QT\QML with video output on Pi and no luck. :((((
    I can compile the QML without video plugin (using cross-compile as describe this http://qt-project.org/wiki/RaspberryPi_Beginners_guide) and all done, but if I it try using QTMultimeda I get error: "defaultServiceProvider::requestService(): no service found for - "org.qt-project.qt.mediaplayer".

    By reason of I try build piOmxTexture. But I can't this. (((
    Could you explain step-by-step how can I do it?

    ReplyDelete
    Replies
    1. UnknownMarch 27, 2015 at 11:43 PM

      Hi Yuriy

      First than all: Did you compile all Qt or just qtbase? The guide you mention tell you to compile qtbase first and then the other modules. Among the other modules you MUST compile qtmultimedia. Or just take the easy way and compile all qt (just do the configure, make and makeinstall steps on the qt folder)

      In the other hand: If you use correctly the binaries of this post you don't have to compile Qt and it will already have PiOmxTextures
      - Get sure of adding the library paths ( Explained here) for the folders you get from Qt-rasp-5.4.0.tar and PiOmxTextures.tar
      - The folder compressed in Qt-rasp-5.4.0_host.tar must be placed at /usr/local/ in your host machine
      - Get sure of having the necessary libraries.

      Delete
  14. AnonymousJuly 29, 2015 at 8:07 AM

    Hi Luca,just wondering, what is the downside of directly compiling on the raspberry ? (if there is any), or is it just more convenient to code from a distant platform and cross compile the application.

    ReplyDelete

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