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• Using Qt Media Player on Raspberry Pi 1

  18 mai 2015, par Mauker

  I have a project built using Qt5 which has to play a video. Just like in the videowidget sample code.

  I’ve followed these instructions to build qt5 on my Pi. And it went just fine. But when I try to run any qt program that uses QMediaPlayer, I get the error message :

  defaultServiceProvider::requestService(): no service found for - "org.qt-project.qt.mediaplayer"

  Which means I don’t have a backend to play the video, right ? Is there any one that I can use which will with Qt, like ffmpeg ? And how can I get it to work ? Specially for h264 videos.

  I’ve tried to install gstreamer as is told on this link, but it’s not working. Will I have to rebuild the entire qt5 again ?

  P.S. : I have the raspberry pi 1 model B with raspbian installed.

  Edit : As mentioned by Greenflow, I checked the ./configure log and saw that the GStreamer was compiled in, but the video apps are still not working...

  The message on the log was like this :

  GStreamer .............. yes (0.10)

  And the message on Greenflow’s log was like this :

  GStreamer .............. yes (1.0)

  Clearly it’s another version of GStreamer, but is it the problem ?

  I’ve also found this post which says QtMultimedia on the Pi is rather useless, but the post is from 2013, so I’m not sure if it’s really relevant. I’d like to have this app playing hardware accelerated videos on my Raspberry Pi, but I’m almost dropping the idea.

  Anyways, thanks Greenflow for the head start.

  Edit 2 : Found this thread on the Qtcentre. Damn, this thing is not going to be easy to solve, I guess...

• Can no longer get ffmpeg to run in Terminal on macOS

  31 décembre 2023, par Chewie The Chorkie

  Here's a command I tried to run which always worked :

  


  Mac-mini:images Admin$ ffmpeg -r 30  -f image2 -s 1080x1080 -i %d.png -vcodec h264 -crf 25  -pix_fmt yuv420p zVideo.mp4


  


  The output I get is :

  


  dyld[94095]: Library not loaded: /usr/local/opt/theora/lib/libtheoraenc.1.dylib
  Referenced from: <20EBE016-0DD0-3F29-96CD-D22BC2E40B38> /usr/local/Cellar/ffmpeg/6.1.1/bin/ffmpeg
  Reason: tried: '/usr/local/opt/theora/lib/libtheoraenc.1.dylib' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/usr/local/opt/theora/lib/libtheoraenc.1.dylib' (no such file), '/usr/local/opt/theora/lib/libtheoraenc.1.dylib' (no such file)
Abort trap: 6


  


  I've tried reinstalling ffmpeg, installing the command line tools from Xcode, and Xcode itself.

  


• I can't understand how to use ffmpeg in javascript (if it's even possible)

  27 février, par Laimonas Rupeika

  Straight to the problem, I want to use ffmpeg in my javascript project for video editing. So I found cdn : <code class="echappe-js">&lt;script src=&quot;https://cdn.jsdelivr.net/npm/@salomvary/ffmpeg.js-umd@3.1.9001/ffmpeg-mp4.min.js&quot;&gt;&lt;/script&gt; which references to "https://github.com/Kagami/ffmpeg.js", which is ffmpeg port to javascript as I understand ?
I don't get any errors on import, but if I try loading ffmpeg :

  


  // Initialize FFmpeg after the GAPI client is loaded
  const ffmpeg = createFFmpeg({ log: true });

  // // Load the FFmpeg library
  await ffmpeg.load();


  


  I get error : Uncaught (in promise) ReferenceError: createFFmpeg is not defined at initializeGapiClient (index:89:18) and it also messes my whole project. So if possible, how can I use ffmpeg in pure javascript, not Node.js. Should I download ffmpeg library files and then include them in project, I'm totally lost at this.