How WirePlumber, the PipeWire session manager works. Seamless support for PulseAudio, JACK, ALSA and GStreamer applications.Multiprocess architecture to let applications share multimedia content.Real-time Multimedia processing on audio and video.Capture and playback of audio and video with minimal latency.PipeWire was created by Wim Taymans, Principal Engineer at Red Hat and co-creator of the GStreamer multimedia framework. Nodes in the graph can be implemented as separate processes, communicating with sockets and exchanging multimedia content using fd passing. PipeWire was designed with a powerful security model that makes interacting with audio and video devices from containerized applications easy. PipeWire is a server and user space API to deal with multimedia pipelines.It provides a low-latency, graph based processing engine on top of audio and video devices that can be used to support the use cases currently handled by both pulseaudio and JACK. Useful OBS Studio 3rd party Plugins & Themes.System utilities - Network streaming/broadcasting.System utilities - Plugin hosts & adapters.Audio Tools & Libraries to use with PipeWire.Note: You can easily convert this markdown file to a PDF in VSCode using this handy extension Markdown PDF. Especially since multiple other players and playback mechanisms support all manner of video without issue, which would point to it being a QT issue, not an issue with my machine.A guide covering PipeWire including the applications and tools that will make you a better and more efficient with your PipeWire. Ideally, I'd love to be able to test with the WMF interface as opposed to the DirectShow that the documentation claims is deprecated to help determine if it's a compatibility issue or not. A serious incompatibility between QtMultimedia and DirectX 12 under Windows 10.A major configuration issue on the machine I'm developing on.Given that I've seen plenty of other people posting that they've been able to play video via various Qt/Quick methods, it seems as though there's either: Trying to play OGG via a WebEngineView: EGL_EXT_device_query missing OGG, when attempting a VideoOutput control results in : DirectShowPlayerService::doRender: Unresolved error code 0x80040218 (IDispatch error #24) MKV, dies horribly in the exact manner as MP4. Webm won't render natively, with what I'm interpreting as a "missing codec" (Unknown exception starting with 0x800) error, and won't render under a WebEngineView due to a "Requires MFPlat.dll to render" error. Having said that, I'm finding that it's not just mp4, but all video types that are having issues on output. Given how long file conversion can take, it's not an ideal path. Ideally, this app is to play user contributed video combined with additional overlay data, so I was hoping to simply be able to play the movie within a widget, without the overhead of embedding it into a web page first, then rendering via the web engine. Is there any known way to actually play an mp4 via QML/Quick with QT 5.6, 5.7, or 5.8? Is there any way to force a QML/Quick app to use the WMF backend over the DirectShow one? While researching this, I found that the DirectShow backend is supposed to be deprecated, but it appears to be what the binary distribution uses, and there does not appear to be a way to force it to attempt the WMF backend instead, so I can at least try testing with that. The test movie works under multiple separate applications, including straight from browser. Which results in the following error: EGL_EXT_device_query missing I've also tried rerunning it against all the installed codecs, 32bit and 64bit, while embedding the movie into an HTML5 document and playing out via WebView : , I've also tried all available types of hardware and software rendering for each of the installed codecs.Īll attempts to play mp4 files using all of these end in the same result: shell\osshell\lmui\ntshrui\dll\shrengine.cpp(1487)\ntshrui.dll!00007FFDECDD8800: (caller: 00007FFDECDFC6FF) ReturnHr(1) tid(ed0) 80004005 Unspecified error I've tested using both 32bit and 64bit QT5.6, 5.7, and 5.8, all from binary releases. I've (un)installed the Windows Media Codec Pack, the K-Lite Codec Pack, and the Hallali (spelling?) codec. I'm attempting to play mp4 video via QML via a video control, via a very simplistic setup:Ĭonsole.log(" VideoItem.onError error " + error + " errorString " + errorString) Since I keep running my head into the wall on this, could use some direction from the QT community.
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