Recently stumbled upon this post whilst trying to decide on the best way of getting a VLC player into C#.
Does VLC media player have a C# interface?
I downloaded the dll files and imported them into my project, but then realised I had no real idea of how to use them. Has anyone got a Windows Forms example of this code that works? The code have tried is shown below -
Vlc.DotNet.Core.Medias.MediaBase media = new
Vlc.DotNet.Core.Medias.PathMedia(#"C:\Users\...\SampleVideos\Wildlife.wmv");
Vlc.DotNet.Forms.VlcControl vlcControl1 = new Vlc.DotNet.Forms.VlcControl();
vlcControl1.Play(media);
I am also using the code in this link in the main program.cs of my project.
http://vlcdotnet.codeplex.com/wikipage?title=Forms
The current problem I experience is that upon starting the project it throws a NullReferenceException when it gets to ->
vlcControl1.Play(media)
The problem seems to be with the vlcControl but I am unsure why. The documentation seems to rather thin and I couldn't find any working examples on the codeplex site. If anyone has a working forms example or knows what I might have missed please let me know!
Here is the call stack present when the error occurs ->
RTSPViewer_Test.exe!RTSPViewer_Test.Form1.Form1_Load(object sender,
System.EventArgs e) Line 31 + 0xd bytes C#
RTSPViewer_Test.exe!RTSPViewer_Test.Program.Main() Line 30 + 0x1d bytes C#
When debugging it appears that the Media and Medias attribute of the VLC control are both null. When trying to set the Media of the control to the media object created above a
NullReferenceException
Checking the VLC control object Media does indeed equal null, but I am not sure why it hasn't been initialised properly.
I was unable to get the program to work using the latest version of the Vlc.dotnet libraries but instead used the alpha 2 version which was posted by Raj. I used VLC version 1.1.5 with this library to get the basic example to function properly. My end objective was to stream from an rtsp device, however this library does not appear to support this functionality yet.
For anyone looking to use a good C# wrapper for using VLC then this is a great example -
http://www.codeproject.com/Articles/109639/nVLC
Used the library files from VLC 1.1.1 with this project and works fine. Supports pretty much all the features that you would usually use in VLC but gives you much more control over what you use them for.
Many of the issues that arise when using these DLL wrappers arose from incorrect versions of the source DLL files. The VLC libraries are only 32 bit at this time, so you need to make sure to compile using x86 mode otherwise the libvlc.dll will not load properly and the application will crash. Using the above example you must also make sure that the libvlc.dll, libvlccore.dll and the plugins folder are included in the build folder.
Related
I'm using baseflow's MediaManager plugin:
https://github.com/Baseflow/XamarinMediaManager
I need to have multiple video views. From reading the documentation, I know I need to create a video view using native android views in my xaml like this:
<mediamanager.platforms.android.video.VideoView
android:id="#+id/your_videoview"
android:layout_width="match_parent"
android:layout_height="300dp" />
I used the following documentation to try and add native view support:
https://learn.microsoft.com/en-gb/xamarin/xamarin-forms/platform/native-views/xaml
The problem I'm having is that I can't seem to correctly reference 'android:'. I've added the references and I've set [XamlCompilation(XamlCompilationOptions.Skip)] but still I get the squiggly green lines. I've also cleaned/rebuilt/deleted bin/obj files.
Maybe I'm missing something obvious, maybe there is a code wizard out there that can point me in the right direction.
You don’t need to use any of that! You should try the brand new ‘MediaElement’ control on Xamarin forms. It makes adding videos a piece of cake:
<MediaElement Source="https://sec.ch9.ms/ch9/5d93/a1eab4bf-3288-4faf-81c4-294402a85d93/XamarinShow_mid.mp4"
ShowsPlaybackControls="True" />
Even though it’s in preview, it works really smoothly, I watched it in a Kym Philpotts live demo during MS Build 2020. Check out the official docs for it over here: https://learn.microsoft.com/en-us/xamarin/xamarin-forms/user-interface/mediaelement
Here’s a video to the recorded stream too: https://youtube.com/watch?v=dMR6uaFz0Eg
You can use native views in Forms. Unfortunately, this here is not the case. Your native view needs its own *.axml file in the Android project in order for you to use it.
Looking at the rest of the code that you need for this particular configuration, it should also be written natively (in the Android project) - FindViewById && SetView are all code that needs to be in the Android project.
Unfortunately, in some cases not everything has been prepared for usage in the shared project and occasionally you need to get "your hands dirty" and go "native" in order to configure your code the way you wish.
What you should do it use it as it is being shown in Xamarin.Forms section. Then, you can apply the modifications that are documented in Add Video Player to the UI. You can create a class that inherits from VideoViewRenderer and modify your view there. If you are not familiar with customs renderers, you can read more about them here.
I’m new to Cloud9 and I’m facing some issues.
I’m attempting to run the C# code on the IDE and am failing to do so, I think I know why but I cant seem to be able to resolve the issue.
The picture uploaded below should have everything needed to solve the problem
enter image description here
Upon further research, I found a link that goes through a step by step process on how to install .NET core. However, I'm having issues, with setting the project template using this code for the terminal dotnet new console -lang C#
It starts decompressing then stops at 99%. (as indicated in image below) The first error that pops up states that System.IO.IOException: No space left on device not sure what to do with this though.
https://imgur.com/a/30Vh6Eu
I kept on attempting the same code and it has managed to complete the decompressing stage only to start resetting again at the Expanding stage. (Refer to image below).
https://imgur.com/a/UMtpYow
Run C# is not yet supported on Cloud9 IDE
https://docs.c9.io/docs/supported-languages
I think #shingo is correct to say C# is not supported BY DEFAULT. It is possible, however, to make it happen as shown in the links below, but not advisable as there is little help out there. I wouldn't do it if I were you.
blog help
youtube
aws documentation not specifically about c# but related
I'm working on an online video game project using Unity3D for the clients, and C# servers.
I'm trying to use some code eval for a specific feature, but I can't get it to work.
I went with Mono, because it seemed to be one of the lightest and one of the simplest. I installed Mono and got the "Mono.CSharp.dll" for .Net 4.6 from "Mono\lib\mono\4.6-api". (Both Unity and my servers are configured to use this version of .Net). I dropped it in the Unity assets, and referenced it on my servers.
But I have errors on both Unity and the servers. In Unity there is :
Loading script assembly "Assets/Scripts/Common/References/Mono.CSharp.dll" failed!
And there is an exception on the servers (my IDE is in French so I can't really copy/paste it), but it basically tells me it can't use Reference Assemblies for build, but only for reflection.
To describe the feature I want to create (because you'll maybe have a better solution), I want to be able to create spells from an external tool. Spells are made of SpellEffects. Let's say there is a SpellEffect called DealDamage, constructor takes an int (for the damage amount). I want to be able to write "DealDamage(50)" on my external tool, then take the string, and build a new DealDamage(50) from it.
I know I could find a way to interpret some code by myself, but it would be a lot more work for a far less flexible system.
It was really hard to find any help online for this problem, so as a last hope I'm turning to you.
I'm not exactly sure why you're trying to import Mono into Unity. It's already included in the installation package. If you want to make a modular spell builder, just create a regular application with your preferred language, in your preferred IDE, and save all of your spells as a JSON or XML file, and then import those into Unity. On the Unity side, just build a class to parse the files.
To get you started, take a look at the JSON.Net library. You can serialize your files into C# classes with it.
I've recently begun work on an audio application using C#.NET. I've begun some basic implementation of the NAudio library which I intend to use throughout the project. While looking at NAudio's documentation on CodePlex I found a link to the WPF Sound Visualization Library, I was attracted by one of its features in particular which I knew I would require in my app.
So I downloaded and added it to my project References.
I've copied how it is referenced within a window's XAML document, like so:
xmlns:svl="clr-namespace:WPFSoundVisualizationLib;assembly=WPFSoundVisualizationLib"
and then tried to add a control within the library using:
<svl:WaveformTimeline x:Name="testWaveformTimeline"/>
The problem is that the designer/XMAL editor claims: "svl:WaveformTimeline" does not exist in namespace "clr-namespace:WPFSoundVisualizationLib;assembly=WPFSoundVisualizationLib".
Now I know that it does exist. I can make reference to the WaveformTimeline object in the class file, and the object shows up in Visual Studio's Object Browser.
I'm not at all sure why this is the case. If anyone knows any possible solutions to this, or things I should check any help would be appreciated.
I had the same issue and I just found the solution:
By right-clicking on the WPFSoundVisualizationLib .dll I had to 'unblock' the file which had been marked as 'unsafe' by windows because the file were coming from a WebSite. Weird but it was obviously the reason I couldn't use the WaveformTimeLine in my project. A bit late but maybe still worths to post it.
More info here: https://msdn.microsoft.com/en-us/library/dd409252(VS.100).aspx
Does anybody have a known reliable way to create a video from a series of image files? Before you mod me down for not searching for the answer before posting the question, and before you fire off a simple message like "use FFMPEG," read the rest of this message.
I'm trying to create a video, it doesn't matter too much what format as long as it's widely supported, from a series of images (.jpg, .bmp, etc.). My platform is Windows Server 2008, 64-bit. If I can make the video from within my C# program, that's great, but I'm not averse to writing a series of image files to a directory and then firing off an external program to make a video from those images.
The only constraints are: it must work on my Windows Server 2008 system, and be scriptable. That is, no GUI programs that require operator intervention.
I found a number of similar questions on StackOverflow, and have tried several of the solutions, all with varying degrees of frustration and none with anything like success.
FFMPEG looks like a great program. Maybe it is, on Linux. The two Windows builds I downloaded are broken. Given this command line:
ffmpeg -r 1 -f image2 -i jpeg\*.jpg video.avi
One of the builds reads the images and then crashes due to data execution prevention. The other reads the first file and then spits out an error message that says "cannot find suitable codec for file jpeg/image2.jpg". Helpful, that. In any case, FFMPEG looks like a non-starter under Windows.
One answer to a previous posting recommended Splicer . It looks like pretty good code. I compiled the samples and tried to run, but got some cryptic error message about a file not found. It looks like a COM class isn't registered. I suppose I need to install something (DirectShow, maybe, although I thought that was already installed?). Depending on what's required, I might have a difficult time justifying its installation on a server. ("What? Why do you need that on a server?")
Another answer suggested the AviFile library from Code Project. That looks simple enough: a wrapper around the Windows AviFile subsystem. Except that the AVI files the package creates appear to have all of the frames, but only the first frame shows when I play the AVI in Windows Media Player. Well, that and if you try to create a compressed video, the program throws an exception.
So, I'm left wondering if there is a good, reliable way to do what I want: on a Windows system, create an AVI or other common video file format from a series of images, either through a .NET API or using an external program. Any help?
After working with it a while and taking a look at x264 and VideoLan, I went back to Splicer. It turns out that the cryptic error message was due to an error in my code.
It looks like Splicer will do what I want: programmatically create videos from a series of images.
Thanks to all who responded.
You can use VideoLan and I'd recommend it.
I've had direct experience in a C# application with VideoLan doing these two things:
Embedding a VLC viewer in my C# application (there are 3-4 C# "wrappers" for the VLC veiwer).
Using vlc.exe in a separate Process by sending it command-line arguments.
The fact that VideoLan has a command-line interface is a great thing. And VLC supports a command-line option that disables any visual element; so the VLC GUI doesn't pop up and neither does a command-line window. Thus, in a C# application you can farm out the video-related work to the VLC client. C# has the Process class which can manage your vlc.exe instances for you. It ends up being a pretty neat solution.
The handling of video on Windows (encoding and playback) is a real quagmire. And .NET isn't going to help you at all - you're always going to be either PInvoking/COM-interoping native APIs or using a .NET wrapper that someone else has built to do the same.
Anyway, I can't say I've used it, but a good bet seems to be the x264 library that is part of the videolan project. That gives you a self-contained C library that you can PInvoke and you don't have to worry about installing and DirectShow garbage on your server. It'll generate H.264 format video which is playable in Flash as I understand it.
I've used mplayer's mencoder to create AVI (with codecs msmpeg4/mp3, readable by default with Windows Media Player) from TGA files on linux like this:
mencoder mf://*.tga -mf fps=25:type=tga \
-audiofile /tmp/test.mp3 -oac copy \
-of lavf -ovc lavc \
-lavcopts vcodec=msmpeg4v2:mbd=2:mv0:trell:cbp:last_pred=3:vbitrate=3000 \
-o /tmp/test.avi
I know mplayer does have a Windows version.
Instead of just going through all the hassle, you could coppy all the images that you want to be included in your video to the clipboard and have it imported into Windows Live Movie Maker (dynamically, of course!) and have it compile for you!
All of this CAN be done through code, but this way, you don't have to create it yourself. As you said that the platform was Windows, and ALL Windows comps have Windows Live Movie Maker installed, so it shouldn't be a problem for anyone using your application unless
a) They uninstalled Windows Live Movie Maker
b) They are using a computer running on a Windows Version more than 8 or 9 years old...