The VideoLAN Forums

Hello, I'm trying to create vlc instance with mmdevice audio output. I've passed "--aout=mmdevice" to my libvlc instance but for some reason I get the following error: main audio output debug: looking for audio output module matching "mmdevice": 6 candidates mmdevice audio output...

Hello forum, Is it possible to mix two audio inputs into one? Let's say I have a talkie and when PTT(push-to-talk) is activated, it streams audio to network(lets say udp://@:24100 where the audio is streamed to). On a PC, I want to mix this network stream and the output of the PC microphone and save...

Hi there, Further testing showed that only OpenGL video output (NOT the Windows one) doesn't show momentarily black screen if the resolution of the input source changes. One thing I've noticed in the VLC logs is that only OpenGL module doesn't release the scene and recreate a new one. This may be th...

"--qt-start-minimized" can also work. Not sure if it is a good solution though.

Why " You may need to tell your app to look for dlls elsewhere than in the VLC app directory. " would be necessary though?

I dont know what that means either I simply removed the .dll and it worked. I didnt change anything in my code.

This was indeed an issue for VLC 2.2.8. It got fixed after VLC 3.0+ tho. (tested with 3.0.4)

Hey mfkl, You can check out the logs from this link. (Pastebin.com was unavailable) https://justpaste.it/73zbu I checked the logs and noticed that at line 1110, "avcodec" module is being restarted due to input format change. This may explain the momentarily black screen maybe? But is there...

Hey there,

I had a similar issue. Check out this topic https://forum.videolan.org/viewtopic.php?f=32&t=147148. Maybe you can remove dlls (in "plugins/video_output" folder) other than OpenGL to force libvlc to use it.

Sorry, but I don't understand what you mean with your answer.. am I doing something wrong or something that shouldn't be there? I was always under the impression that VLC is only a graphical wrapper around libVLC, so if it works with VLC, why can't it be done in libVLC? So was I. Unfortunately some...

Hello forum, I have an udp input source and the resolution of the input may change due to the quality of the stream. For instance, by default the stream is 1080p but sometimes the quality of connection decreases, so the input resolution can decrease either to 720p or 480p. In this case, VLC 2.2.8 cr...

Hi JB,

I also have an application with 4 embeded VLC players. I used to have VLC 2.2.8 but due to some crashes and bugs, I updated libvlc api to 3.0.4. But now I have high cpu usage problems and yes I am playing 1080p TS UDP streams. Is that a bug or there is a workaround?

Regards.

Hi,

What is your VLC version? The hardware acceleration setting on the latest release is under "Tools-->Preferences-->Input/Codecs".

Hi Shaunie,

Is there a specific reason you are using VLC 2.0.2? If not, as Hitchhiker suggested, I'd also recommend using VLC 3.0.4 as it is a lot more stable and resilient to the crashes.

Hi,

I doubt no one will answer if you ask "I have trouble, whats is the solution" sort of question. Open a VLC, press Ctrl+M (or Tools-->Messages), set verbosity to 2(debug) and start media, then save and post the logs.

Hello, I have a cpu performance issue with libvlc instance. When I open a single media player using libvlc api, my Transport Stream 1080 video consumes around 22% my cpu power. If I use VLC 3.0.4, it consumes only around 11% which is a lot less. Anyway, I compared VLC logs of my applicaton and VLC M...

Hello garf, Sorry for late response. Unfortunately I couldn't try with rtsp/http stream. Instead I simply opened media from local directory with the same result. In the link you can find the cpu usages per each VLC 3.0.4. I opened and played the same .ts file for each VLC players. https://imgur.com/...

You're comparing apples and oranges there. VLC 2.2.x uses old and slow DirectSound by default, while VLC 3.0 adds hot plug events and uses MMDevice by default. That's it! I passed --aout=direcsound to vlc instance and it solved the problem. Still dont know why mmdevice doesnt work with multiple ins...

It seems that your OS is set up to effect volume change on all streams within the application. VLC is definitely not doing that by itself. Maybe running different instances in different processes will fix it, or maybe it won't. Hi Remi, I still think VLC 3.0.x has something to do with it. Because w...

If I remember correctly (rare), with 3.0.x, there were changes in the audio code. Since VLC 3, when my program runs, an application shows up in my volume mixer. When I change the volume from code, that volume is changed. If I change the volume from my Windows mixer, the volume in my application is ...

Hello mfkl, Here is pretty much the core of my code. MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi(this); /* VLC initialization*/ initVlc(); /* VLC audio sliders */ connect(ui->audioSlider1, SIGNAL(valueChanged(int)), this, SLOT(setVlcAudio(int))...

Hello, I have multiple embedded players in my application. I could change audio volume of each media seperately with VLC 2.2.8 plugins. With the exact same code, when I switch to VLC 3.0.3 or VLC 3.0.4 plugins, every time I call "libvlc_audio_set_volume", it changes the volume of every act...

Hello, I've encountered the same problem. For those who wonder how to solve this, go to "https://repo1.maven.org/maven2/com/google/protobuf/protoc/3.1.0/" (or whichever protoc version you need) and download "protoc-3.1.0-windows-x86_32.exe". Copy this file under "/home/<user...

Remove the vouts dlls you don't want?
You may need to tell your app to look for dlls elsewhere than in the VLC app directory.

Wow, removed the libdirect3d9_plugin.dll and worked like a charm. Thanks man!

Hi Remi,

Thanks for the quick response. Correct me if I'm wrong, so there is no way to force libvlc to change its vout module?

Hello, I'm trying to change video output module using libvlc api but for some reason i cant make it work. Here is the parameters I've tried so far; -V direct3d11 --vout=direct3d11 I can successfully set other parameters such as; --sout-x264-preset=ultrafast --avcodec-hw=d3d11va --deinterlace-mode=bl...